How Much Benadryl Can I Take Safely?

Written by
Juhi Modi

Medically reviewed by
HaVy Ngo-Hamilton, Pharm.D.
| May 25, 2022

Benadryl is a common over-the-counter medicine used to relieve symptoms of allergic rhinitis (hay fever) and the common cold, such as runny nose, sneezing, and watery/itchy eyes. It is also used to provide relief from irritated or itchy skin caused by insect bites, hives, eczema, sunburn, and other medical conditions like motion sickness and insomnia. All in all, it has a great variety of uses.

While it is an effective drug, the risk with exemplary over-the-counter medications like Benadryl is that you can easily continue taking it for symptomatic relief without noticing that you are going over the recommended dosage. Doing so can lead to severe side effects. 

This article will discuss the appropriate doses and the risks of taking too much Benadryl.

What is Benadryl?

Brand name Benadryl contains the active ingredient diphenhydramine. It is an over-the-counter antihistamine that helps relieve symptoms of seasonal allergies, the common cold, and itchy skin due to bug bites or allergic reactions. 

Benadryl is available in many different forms, including:

• Oral (to be taken by mouth): tablets, chewable tablets, liquid-filled capsules,liqui-gels, and liquid solution
• Topical (to be applied to the skin): creams, gels, and sprays

Some combination products contain diphenhydramine as the main ingredient along with other ingredients. For example, Benadryl Allergy Plus Congestion for Sinus Pressure & Nasal Congestion Relief contains diphenhydramine, an antihistamine, and phenylephrine, a nasal decongestant.

What is the correct Benadryl dosage?

The correct Benadryl dosage depends on several factors. Among those factors is the condition you’re treating, your age, and the form of Benadryl you’re using. Your physician will advise you to take the lowest effective dose of Benadryl for the shortest possible time as best practice recommends.

Regarding effective Benadryl dosing, commonly used and recommended doses of Benadryl are as follows:

For hay fever, allergies, and common cold symptoms

The recommended dose for adults and children 12 years and older is 25 mg to 50 mg every 4 to 6 hours. 

The recommended dose for children between the ages of 6-12 is 12.5 mg to 25 mg every 4 to 6 hours. 

Children under the age of 6 e should not take oral Benadryl without a doctor’s prescription. 

For itchy skin from insect bites, stings, hives, allergic reactions, or other causes

Adults and children from age 2+ can use the topical form of Benadryl and apply gel, cream, or spray to the affected area up to 4 times daily unless the area is widespread and the oral form is advised by a healthcare professional. Children under 2 years of age should use Benadryl topical products only if advised by a physician.

This is a general dosing guide. Some patients, for example, elderly patients, may need to take lower doses of this medication. If you have any specific questions about Benadryl dosages regarding your age and condition, you should consult your doctor or pharmacist. 

What is the maximum dosage of Benadryl?

The maximum dose of Benadryl for adults and children over 12 years of age is 300 mg per day. The maximum dose of Benadryl for children between the ages of  6 to 12 is 150 mg per day. Do not take more than 6 doses of oral Benadryl in 24 hours. 

Benadryl topical products (creams, gels, sprays) should not be applied to the skin more than 4 times a day.

It is important to check all your other antihistamines and ensure that your other medications don’t contain the same active ingredient, i.e., diphenhydramine. The maximum dose mentioned above is the dose you can safely take from all products and different forms combined.

What are Benadryl’s side effects?

The common side effects of Benadryl include sleepiness, dizziness, headache, dry mouth, dry eyes, and weakness. If these symptoms are severe or do not go away after a few days, talk to your doctor or pharmacist.

Benadryl can also cause more serious side effects, such as problems with cognition (thinking),  memory, fast heartbeat (tachycardia), and seizures. Contact your doctor if you experience these side effects and seek emergency medical care for serious side effects such as seizures. 

What are Benadryl risks and drug interactions?

Benadryl can cause drowsiness, which can impair your ability to drive, operate heavy machinery, or do anything that requires focus. Falling asleep at the wheel can result in accidents, so follow your doctor’s instructions and do not drive while taking Benadryl until you know how this medication affects you.

If you are taking other drugs, talk to a healthcare provider before taking Benadryl to avoid serious drug interactions. For example, taking Benadryl with benzodiazepines (Valium, Xanax, Klonopin) can increase the risk of confusion, drowsiness, and delirium. Mixing Benadryl and alcohol can lead to drowsiness and sedation, increasing the risk of accidents and injuries.

How many days in a row can you take Benadryl?

You should not use over-the-counter (OTC) Benadryl for longer than 7 days as treatment for cold and allergy symptoms. OTC Benadryl is intended for short-term use to provide temporary relief of allergy symptoms. If your symptoms do not improve after a week of Benadryl use, contact your doctor to obtain an accurate diagnosis and discuss alternative treatments.

What happens if you take too much Benadryl?

Scientists do not know a lot about the side effects of taking Benadryl long-term, but it has been linked to conditions such as:

• Constipation
• Weight gain
• Blurred vision
• Hallucinations 
• Memory problems, confusion, dementia
• Restless legs syndrome
• Depression and anxiety
• Tolerance and dependence

Can you overdose on Benadryl?

Yes, you can overdose on Benadryl. Signs and symptoms of a Benadryl overdose may include:

• Confusion
• Blurred vision
• Dry mouth
• Dizziness
• Heart arrhythmia
• Difficulty breathing
• Irritability
• Restlessness
• Confusion
• Hallucinations
• Shock
• Seizures
• Coma
• Death

If you or someone you know may have overdosed on Benadryl, call 911 or seek care at the nearest emergency room without delay.

Wrapping Up: Safe use of over the counter medications like Benadryl

It is not safe to take more than the recommended dosage of over-the-counter medicines like Benadryl. Taking too much Benadryl can cause serious problems, including hallucinations, abnormal heart rhythms, seizures, and even death. Always read the labels on OTC medications carefully and ensure that you take the recommended daily dosage. 

References:

1. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=702f9786-7ce9-43e4-921d-e1db09612127
2. https://medlineplus. gov/druginfo/meds/a682539.html#
3. https://www.benadryl.com/benadryl-dosing-guide

Benadryl Best Practices

Written by
Juhi Modi

Medically reviewed by
HaVy Ngo-Hamilton, Pharm.D.
| Jan 17, 2023

The brand name Benadryl contains the generic medication diphenhydramine. It is an over-the-counter antihistamine that is available in different forms like tablets, chewable tablets, liquid-filled capsules (liqui gels), oral solutions, and topical products, such as itch relief creams and sprays.

This dosing guide will help you understand how much Benadryl you can safely take to avoid severe side effects. In general, you should take the lowest effective dose for the shortest possible time. Taking Benadryl long-term has been linked to an increased risk of memory problems and dementia. If you are taking other medications or have certain health issues, you should talk to a healthcare professional to ensure that Benadryl is safe for you and there are no drug interactions with other medications. 

What medical conditions is Benadryl used to treat?

Benadryl works by blocking histamine, a natural substance in the body. Histamine is responsible for allergy symptoms. Therefore, by blocking histamine, Benadryl can help relieve symptoms of seasonal allergies, hay fever, allergic rhinitis, and the common cold, such as runny nose, sneezing, post-nasal drip, and red, watery, and itchy eyes. This antihistamine effect also makes Benadryl useful for treating itchy skin caused by allergic reactions and insect bites. Last but not least, as this is one of the most common uses of Benadryl, due to the sedating nature of Benadryl, this medication is often used to help with insomnia (trouble falling asleep) and motion sickness. 

Diphenhydramine is a common ingredient of many OTC colds and flu products containing other drugs like decongestants and cough suppressants. With more than one ingredient, these OTC colds and flu medications are considered multi-symptom products as they provide relief for sinus pressure, nasal congestion (stuffy nose), runny nose, and sneezing.  

What are the side effects of taking too much Benadryl?

Taking too much Benadryl or taking it with other antihistamines can result in severe side effects and drug interactions. Side effects can include excessive sleepiness, confusion, difficulty concentrating, memory problems, dry eyes, dry mouth, and a fast heartbeat.

Like with all over-the-counter medications, it is important to take only the recommended dosage of Benadryl. Taking more than the maximum dose of oral Benadryl can result in serious side effects. 

It is also worth remembering that many over-the-counter cold and allergy remedies contain the same active ingredient. You should read the package label carefully to ensure you are not taking more than one product containing diphenhydramine.  

What is the recommended dose of Benadryl?

The recommended doses of Benadryl vary according to how much active ingredient (diphenhydramine) is present in a specific product. Keep in mind that Benadryl dosing depends on the following factors:

• The indication — what condition are you treating?
• The age — Benadryl is considered unsafe for children under 2 years
• The dosage forms —  Benadryl products have a wide variety of dosage forms such as capsules, tablets, and oral solution. Therefore, it is important to know how much Benadryl you get in a dose. For example, the standard concentration of children’s Benadryl oral liquid is 12.5 mg per 5 mL; This means every 5 milliliters (mL) of the oral liquid, you will get 12.5 milligrams (mg) of diphenhydramine.    

Below is a brief dosing guide for Benadryl use.

Benadryl Allergy Extra Strength 

This formulation contains 50 mg of diphenhydramine per tablet. Adults and children over 12 can take 1-2 tablets every 4 to 6 hours. Do not take more than 6 doses in 24 hours. This product is not for children younger than 12 years.

Benadryl Allergy Ultratab and Benadryl Allergy Liqui Gels 

These formulations contain 25 mg of diphenhydramine per tablet or capsule. Adults and children over 12 can take 1-2 tablets every 4 to 6 hours. Children between 6 and 12 years of age can take 1 tablet every 4 to 6 hours. Do not take more than 6 doses in 24 hours. These products are not for children younger than 6 years.

Topical Benadryl Products

Topical products like Original Benadryl Itch Stopping Cream or Benadryl Extra Strength Spray for bug bites should be used no more than 3-4 times a day on the affected area. These topical products are suitable for adults and children 2 years of age and older.

Can you take 100 mg of Benadryl?

Yes, you can take 100 mg of Benadryl. The maximum daily dose of oral Benadryl is 300 mg for adults and children 12 years and older. The maximum daily dose for children between 6 and 12 years old is 150 mg. 

Can I take 2 Benadryl a day? 

Yes, you can take 2 Benadryl a day. Most adult formulations contain 25 mg to 50 mg of diphenhydramine hydrochloride (the main ingredient in Benadryl). You can take 1-2 tablets every 4 to 6 hours as long as it does not exceed 6 doses of Benadryl in a 24-hour period.

How many chewable tablets of Benadryl can you take in a day?

Children’s Benadryl Chewables contain 12.5 mg of diphenhydramine. People over the age of 12 years can take 2-4 chewable tablets (25 mg to 50 mg) every 4 to 6 hours. Children between 6 and 11 years old can take 1-2 chewable tablets (12.5 mg to 25 mg) every 4 to 6 hours. Children between 2 and 5 years old should take oral Benadryl chewables as directed by their doctor. Benadryl is not for children younger than 2 years old.

How many Benadryl can you take at once?

Adults can take up to 100 mg or 1-2 tablets of Benadryl at once. However, you should try to take the lowest possible dose for the shortest possible time to treat your symptoms.

How much is too much Benadryl in a day?

More than 300 mg in a day is too much Benadryl for adults. Keep in mind that children need to take lower doses, and you should always talk to a doctor before giving Benadryl to a child.

What are the symptoms of a Benadryl overdose?

A Benadryl overdose can cause signs and symptoms like confusion, urinary retention (decreased urination), fast heartbeat, low blood pressure, dry mouth, blurred vision, irritability, hallucinations, and changes in electrocardiogram readings. These signs and symptoms are dose-dependent and will be more severe with larger doses. Very large doses of more than 1 gram of diphenhydramine can lead to delirium, seizures, coma, and even death. If you or a loved one has taken too much Benadryl, go to the nearest emergency room for immediate medical care.

Wrapping up

It’s important to carefully read the package instructions on all over-the-counter medications to avoid serious side effects. Benadryl is easily available without a prescription and is widely used to relieve symptoms of common illnesses like allergic rhinitis, the common cold, and motion sickness. 

However, taking more than the recommended dose of Benadryl can result in serious health complications. Remember, many other medications contain diphenhydramine. Knowing which medications contain diphenhydramine is important so that you won’t take more than the recommended dose of Benadryl.

Also, keep in mind that some products may contain other ingredients in addition to diphenhydramine which can make side effects worse. If you have any known drug allergies, talk to your doctor or pharmacist about which Benadryl product is safe for you.

Remember that alcohol and some drugs used to treat certain medical conditions can interact with Benadryl. Certain combinations of medications can result in severe side effects due to drug interactions. Always check with your healthcare professional before taking Benadryl if you are on other medications.

References:

1. https://www.benadryl.com/benadryl-dosing-guide
2. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4592307/
3. https://poisoncontrol.utah.edu/news/2021/11/diphenhydramine-toxicity#

Benadryl Dosages, Forms and Benefits | SingleCare – Product Information

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Benadryl forms and strengths | Benadryl for adults | Benadryl for children | Dosage table of Benadryl | Dosage of Benadryl for Allergies | Dosage of Benadryl for motion sickness | Dosage of Benadryl for insomnia | Benadryl for pets | How to take Benadryl | FAQs

Benadryl is an over-the-counter medication that temporarily relieves allergy symptoms caused by a natural substance in the body called histamine. Diphenhydramine, the active ingredient in the branded drug Benadryl, is an antihistamine that blocks the activity of histamine and reduces symptoms such as runny nose, watery eyes, and itching.

Diphenhydramine also causes drowsiness and slows down the part of the brain that controls nausea. For these reasons, Benadryl may also be used to relieve occasional insomnia or prevent motion sickness.

For patients over 12 years of age, the standard dosage of Benadryl Allergy is 25 to 50 mg (milligrams) – one to two tablets or capsules – every four to six hours. Children aged 6 to 11 years can be given Benadryl at a maximum dose of 25 mg (one tablet or capsule) every four to six hours. Benadryl can be taken with or without food.

RELATED: What is a Benadryl Allergy? | Benadryl Allergy Coupons

Benadryl Formulations and Strengths

Benadryl tablets and softgels contain 25mg of diphenhydramine hydrochloride and are usually taken by adults and children 6 years of age and older. Benadryl Allergy Plus, however, also contains 10 mg of phenylephrine hydrochloride, a nasal decongestant. Benadryl Allergy Plus Congestion should not be given to children under 12 years of age unless directed by a doctor.

• Benadryl Allergy Ultratab : 25 mg diphenhydramine per tablet
• Benadryl Allergy Liquid Gels without dyes : 25 mg diphenhydramine per gel capsule
• Ben adryl Allergy Plus Congestion : 25 mg diphenhydramine / 10 mg phenylephrine per tablet

Benadryl Adult Dosage

The standard adult dose of Benadryl is one to two tablets or softgels (25-50mg) every four to six hours.

• Standard Adult Dose of Benadryl: One to two tablets/capsules (25-50mg) every four to six hours.
• Maximum adult dosage of Benadryl: Two tablets/capsules (50 mg) every four hours, maximum 12 tablets (300 mg) in 24 hours.

Benadryl dosage for children

Benadryl dosages may depend on the age or weight of the children. Children’s allergy to Benadryl is more suitable for children aged 6 to 11 years. Contains half the dose of diphenhydramine (12.5mg) as Benadryl Allergy, Children’s Benadryl Allergy, sold in a child-friendly liquid and chewable tablet form.

• Children’s dosage of Benadryl for children 2 to 5 years of age: Do not give unless directed by a physician.
• Benadryl dosage for children 6 to 11 years old: One to two chewable tablets or 5 to 10 ml every four to six hours, maximum 12 tablets or 60 ml in 24 hours.
• Pediatric dosage of Benadryl for children 12 years of age and older: Two to four chewable tablets or 10 to 20 ml every four to six hours, maximum 24 tablets or 120 ml in 24 hours.

RELATED: What is Children’s Benadryl? | Benadryl coupons for children

Benadryl (adult drug) can be given to children between 6 and 11 years of age, but should not be given to children under 6 years of age. Although Benadryl Allergy can be used to relieve insomnia. in children 12 years of age and older, it should not be used as a sleeping pill in children under 12 years of age.

• Standard dose of Benadryl for children under 6 years: Do not give unless directed by a doctor.
• Standard dose of Benadryl for children 6 to 11 years old: One tablet/capsule (25 mg) every four to six hours.
• Maximum dosage of Benadryl for children aged 6 to 11 years: One tablet/capsule (25 mg) every four hours, maximum six tablets (150 mg) in 24 hours.

Children aged 6 to 11 should not be given Benadryl Allergy Plus Congestion except under the direction of a pediatrician.

901 25 Not prescribed without a doctor’s order.

Benadryl dosage for allergy symptoms

Benadryl relieves symptoms caused by allergies, hay fever, or the common cold, including runny nose, nasal congestion, sinus pressure, sneezing, rash, watery or itchy eyes, and itchy nose. It is also indicated for the relief of pruritus (pruritus) caused by the release of histamine due to an allergic reaction (contact dermatitis), urticaria (urticaria), or insect bites.

• Adults and adolescents (12 years of age and older): 25–50 mg every four to six hours.
• Pediatric patients (6-11 years): 25 mg every four to six hours.
• Patients with renal insufficiency:
  • Creatinine clearance 10-30 ml/min: No adjustment.
  • Dialysis: no adjustment and no additives.
• Other warnings: Talk to your doctor before taking Benadryl if you have any of the following:
  • Ocular hypertension or glaucoma
  • Hyperthyroidism
  • Cardiovascular disease
  • High blood pressure
  • Asthma or COPD
  • Gastrointestinal obstruction or peptic ulcer 900 38
  • Enlarged prostate
  • Bladder neck obstruction

Benadryl dosage for motion sickness

Benadryl can be used to prevent and treat motion sickness.

• Adults and adolescents (12 years of age and older): 25 to 50 mg 30 minutes before travel and every six to eight hours while traveling.
• Pediatric patients (6-11 years old): 12.5 to 25 mg 30 minutes before travel and every six to eight hours during travel.

Benadryl Dosage for Insomnia

Benadryl may be used for the occasional relief of insomnia or travel-related insomnia in adults and adolescents 12 years of age and older.

• Adults and adolescents (12 years of age and older): 25 to 50 mg 30 minutes before bedtime.
• Pediatric patients (6-11 years): Do not give unless directed by a physician.

Benadryl Dosage for Pets

Benadryl is not approved for use in pets, but veterinarians prescribe diphenhydramine in dogs, cats, and large animals to treat allergic reactions, nose allergies, itching, hives, motion sickness, and anxiety problems. Veterinarians also use diphenhydramine to treat certain types of cancer (mast cell tumors), shock, life-threatening allergic reactions, and other conditions.

The standard veterinary dosage is 2 to 4 mg diphenhydramine per kilogram of body weight (1 to 2 mg per pound) two or three times a day. However, check with your veterinarian before giving your pet Benadryl or any other over-the-counter medication.

RELATED: How to treat allergies in cats and dogs six o’clock or doctor’s instructions. Benadryl can be taken with or without food.

• Follow the instructions on the medicine label if you are taking this medicine without a prescription.
• If you are taking this medicine with a prescription, your doctor will tell you how much to use. Do not use more than indicated.
• Swallow the tablet or softgel whole. Do not crush, break or chew it.

Safety Tips

When taking or using Benadryl, you can consider the following safety and efficacy tips:

• Always check the expiration date. If the medicine has expired, dispose of it safely and buy a new box.
• Benadryl should be stored at room temperature (68°C -77F)
• Check all other medicines you or your child are taking to make sure they also do not contain diphenhydramine or phenylephrine. Both are commonly found in combination with cold, flu, or allergy medications. Pay special attention to topical itch medications that may contain diphenhydramine. These drugs, including topical diphenhydramine, should never be used with Benadryl.
• Do not take Benadryl with alcohol or sedatives.
• People who have glaucoma, breathing problems due to emphysema or chronic bronchitis, or difficulty urinating due to an enlarged prostate should talk to a doctor before taking Benadryl.
• Pregnant or breastfeeding women should consult their physician before taking Benadryl.
• Although Benadryl is approved for use in children 6 years of age and older, Benadryl Allergy should not be used as a sleep aid in children under 12 years of age.
• For motion sickness, take Benadryl 30 minutes before travel or movement. If you are going on a long trip, take the following doses every six to eight hours.
• Record the time for each dose in a diary or schedule so that the next dose is not given too soon.
• Benadryl is a sedative, so do not operate machinery or drive if you feel tired, drowsy or lose concentration. Before taking diphenhydramine, it is recommended to remove obstacles and dangers in the house.

Benadryl Dosage FAQ

How long does Benadryl last?

When taken as directed, Benadryl Allergy usually starts working 30 minutes after ingestion and reaches peak levels in the body in about two hours. In general, food does not affect the absorption of Benadryl and does not reduce its effectiveness. However, regular use of Benadryl can lead to tolerance. Over time, the standard dose may gradually lose effectiveness.

How long does Benadryl stay in your body?

At the recommended dosage, the effects of Benadryl should last between four and six hours, but this may vary. Generally, the amount of time Benadryl stays in the system increases with age.

Health care providers measure how long a drug stays in the body by its half-life, which is the time it takes for the body to eliminate half the amount of the drug in the body. The half-life of diphenhydramine in children is four to seven hours (average five hours). For adults, the elimination half-life is seven to 12 hours (mean nine hours). For the elderly, the elimination half-life is nine to 18 hours (mean: 13.5 hours).

What happens if I miss a dose of Benadryl?

No problem if you don’t take a dose of Benadryl. Take the missed dose at any time. The dosing schedule will be reset, so wait at least four hours before taking your next dose. Do not take extra medicine to make up for a missed dose.

How can I stop taking Benadryl?

You can safely use Benadryl regularly to treat allergic reactions, insomnia, or motion sickness. It should only be used occasionally as a sleep aid. Diphenhydramine – This is sometimes abused. Chronic use of Benadryl, especially to relieve anxiety or insomnia, can lead to addiction and withdrawal symptoms if Benadryl is stopped quickly. High doses of Benadryl can cause severe heart problems, seizures, coma and death. Before you stop taking Benadryl, talk to your doctor about lowering your Benadryl dose or using alternative medications or treatments to reduce anxiety or treat insomnia.

You should stop taking Benadryl and consult your doctor if you experience excessive nervousness, drowsiness, allergic reactions, or if symptoms do not improve after seven days.

What can be used instead of Benadryl Allergy?

Health care professionals generally do not recommend the use of first-generation antihistamines such as diphenhydramine, the active ingredient in Benadryl. Second-generation antihistamines are as effective as diphenhydramine but do not cause as much sedation or drowsiness. Instead of Benadryl Allergy, you can choose several second-generation OTC antihistamines such as Claritin (loratadine), Alavert (loratadine), Allegra (fexofenadine), Zyrtec (cetirizine), and Xyzal (levocetirizine).

What is the maximum dosage of Benadryl?

The maximum dose is 50 mg (two tablets or softgels) every four hours to a maximum of 300mg (12 tablets or softgels) in any 24 hour period for adults and adolescents 12 years of age and older.

For children aged 6 to 11 years, the maximum dose is 25 mg (one tablet or softgel) every four hours, but not to exceed 150 mg (six tablets or capsules) in any 24 hour period.

What interacts with Benadryl?

Food does not affect the absorption or effectiveness of Benadryl.

Some over-the-counter and prescription drugs may interact with Benadryl, and some may reduce the effectiveness of Benadryl. Medicines that depress or slow down the central nervous system, such as tranquilizers, alcohol, or sedatives, may increase the side effects of Benadryl, such as drowsiness, dizziness, sedation, dry mouth, and blurred vision. Always check with your doctor before taking Benadryl Allergy with central nervous system depressants or other medicines.

Benadryl Allergy Plus Congestion also contains phenylephrine, a stimulant. When taken with monoamine oxidase inhibitors (MAOIs), a family of medications that includes certain types of antidepressants, antibiotics, and drugs for Parkinson’s disease, phenylephrine can cause dangerous and potentially life-threatening increases in blood pressure. Do not take Benadryl with an MAOI or within 14 days of stopping an MAOI inhibitor. Check with your doctor, pharmacist, or other health care provider if you think a medicine you are taking may be an MAO inhibitor.

Resources:

• Benadryl Allergy, Epocrates
• Children’s Benadryl, Epocrates
• Dosing Guide, Johnson & Johnson
• Benadryl Allergy Ultratab Tablets, Johnson & Johnson 900 38
• Dye-Free Benadryl Allergy Liquid Gels, Johnson & Johnson
• Benadryl Allergy Plus Congestion, Johnson & Johnson
• Compound Summary, National Library of Medicine
• Diphenhydramine, StatPearls
• Diphenhydramine for Animals , VCA Hospitals
• Chronic Diphenhydramine Abuse and Withdrawal Syndrome , Neurology: Clinical Practice
• Antihistamine Doses , MSD Veterinary Manual
• Far macological treatment of motion sickness, LOUSE. Pharmacist
• FDA warns of serious problems with high doses of allergy drug diphenhydramine. , FDA

How long after Claritin can I take Benadryl (and why)? –

Last updated: December 2, 2022 / author
Sandeep Bhandari

/ Fact verified / 4 minutes

Exact answer: Twenty hours

Claritin, more commonly known as Loratadine, is also sold under other brand names such as Claratin and Claritin. It is one of the medicines on the list of essential medicines provided by the World Health Organization. This drug is widely used in the treatment of several types of allergies in different patients.

Health

Test your knowledge of health-related topics

1 / 10

Physical health is…

How fit you are and how healthy your body is.

The pH in your body, which is related to your emotions.

How focused you are on other people’s bodies.

None of the above

2 / 10

What is the best way to improve sleep quality?

Maintaining a consistent sleep schedule

Regular exercise

No caffeine before bed

All of the above

3 / 10

What is the main cause of chronic obstructive pulmonary disease (COPD)?

Genetics

smoking

Air pollution

All of the above

4 / 10

What type of arthritis is most common?

Rheumatoid arthritis

osteoarthritis

Psoriatic arthritis

gout

5 / 10

How best to protect yourself from the harmful rays of the sun?

Wear a hat

Apply sunscreen

Wear sunglasses

All of the above

6 / 10

What is the best way to reduce the risk of cardiovascular disease?

No smoking

Diet low in saturated fat

Maintaining a healthy weight

All of the above

7 / 10

What is the best way to maintain a healthy weight?

Counting calories

Eat smaller meals

Regular exercise

All of the above

8 / 10

What is the leading cause of death worldwide?

cancer

Heart disease

stroke

Traffic accidents

9 / 10

What is the best way to improve mental health?

MEDITATION

Talk to someone about your feelings

Physical activity

Spending time alone

10 / 10

Which vitamin helps strengthen bones and teeth?

Vitamin A

Vitamin C

Vitamin D supplements

Vitamin E

your account

Total

twenty-two carbon atoms and two nitrogen atoms, as well as four oxygen atoms. The hydrogen atom is responsible for filling the remaining valences. The molecular weight of the drug is 382.89g per mole, and is administered orally by mouth.

How long after Claritin can I take Benadryl?

Claritin is available in various forms as tablets and syrups. It is also present in the form of an oral suspension. The half-life of the drug is close to eight hours. The melting point of Claritin is very high at approximately 182 degrees Celsius or 359 Fahrenheit. The bioavailability of the drug is almost one hundred percent, and it is one of the most effective drugs in the treatment of diseases. This medicine is one of the most commonly prescribed medicines for patients with allergies caused by various infectious agents.

Claritin was first synthesized in 1972, and various drug trials were carried out on several patients to test the effectiveness of the drug. The drug was finally approved for medical use after about two decades, in 1993. Claritin notes good results in the treatment of patients suffering from urticaria and allergic rhinitis. Schering-Plough is credited with synthesizing the drug at a small pharmaceutical company based in the United States. This medicine is also widely sold along with another medicine called Benadryl.

901 25 Few side effects, but low efficacy

It is not recommended to take Claritin and Benadryl at the same time due to possible complications. If Benadryl is taken after twelve hours of Claritin, then there are few side effects, but the effectiveness is very low. On the contrary, if the time interval is increased to twenty hours, then only one or two side effects are observed, and the effectiveness of the drug also increases many times over.

Why does it take so long after Claritin to take Benadryl?

Benadryl, also known as Unisom and Sominex, is a popular drug used to treat nausea and cold symptoms. It is also helpful in conditions such as allergies. The drug can be taken orally through the mouth or administered intravenously. It can also be applied to the patient’s skin. The molecular formula of the drug contains seventeen carbon atoms and one nitrogen atom, as well as a single oxygen atom. The hydrogen atom is responsible for filling the remaining valences. The molecular weight of the drug is 255.355 grams per mole.

Benadryl takes so long to take after Claritin due to the drug composition of both drugs. Both compounds have similar side effects and using them together can increase the chances of getting many unfavorable wrinkles. If both are used together, then the contents of both drugs are mixed with each other, and the drugs do not work very effectively. Before taking both drugs, you should consult your doctor.

The two drugs also have some side effects. The most common side effects include anxiety and headaches. Patients may also experience sleep problems and nausea after taking this medication. However, it is still unclear whether the drug can be taken during pregnancy, but no side effects have been observed in either the mother or the child. It is also recommended that you do not drive under the influence of these drugs, as this can lead to loss of concentration and cause an accident.

Conclusion

Finally, we can conclude that Claritin is a medicine that is used for patients suffering from diseases such as allergies. The drug was first introduced in 1972; however, a few decades later, in 1993, it was approved for medical use. It is highly effective and is also considered safe by medical experts all over the world.

On average, the patient must observe a time interval of twenty hours between Claritin and Benadryl in order to prevent disease. It has been found that when both of these drugs are taken together, the chances of getting an adverse effect are increased. It is always extremely important to visit a medical practitioner and learn about drug use in order to be on the safe side.

Recommendations

1. https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1600-0420.1999.tb01175.x
2. https://jpet.aspetjournals.org/con tent/86/3 /229?utm_source=TrendMD&utm_medium=cpc&utm_campaign=J_Pharmacol_Exp_Ther_TrendMD_0

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Sandeep Bhandari

Sandeep Bhandari is the founder of ExactlyHowLong.com.

I am a professional full-time blogger, internet marketer and trainer. I love everything connected with the Internet and every day I try to learn new technologies.