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Doctor insights on: Benadryl Dosage

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How much Benadryl (diphenhydramine) is considered too much?

How much Benadryl (diphenhydramine) is considered too much?

Benadryl (diphenhydramine): Either the recommended amount based on weight through the directions on the box or following your doctors recommendations if the recommended dose they made is higher. ...Read more

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Dr. John Chiu
1,045 doctors shared insights

Diphenhydramine (Definition)

Diphenhydramine is a sedating antihistamine which is a kind of antihistamine type drug (common ...Read more


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How do I figure out the Benadryl (diphenhydramine) d dosage for children by weight?

How do I figure out the Benadryl (diphenhydramine) d dosage for children by weight?

1 tsp/25 lb: The regular dose is a teaspoonful of the liquid per 25 lb. This is also about 1mg/kg. ...Read more

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What is a legal dosage of Benadryl and arsenic liquid?

What is a legal dosage of Benadryl and arsenic liquid?

See below: There is no legal dose for arsenic. It is a poison, not a medication. For Benadryl, talk to the pharmacist where you buy it. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if have sex. ...Read more

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Dosage of Benadryl (diphenhydramine) for a 21 month old 21 lb toddler?

Benadryl (diphenhydramine).: A potent antihistamine with lot side effects. Don't recommend. For what purpose are you using it and there are safer alternatives for children. Didn't state reason want use it. I say caution as there are safe alternatives to whatever u think u are treating. Please be careful. In children, meds like this seldom necessary. Avoid side effects. Consult dr. ...Read more

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Can i give my 10 month old Benadryl (diphenhydramine) if so what dosage?

Benadryl (diphenhydramine): Yes, but the dose is based on weight, not age. I believe there is a website that calculates dosages of otc meds for parents. I think it's called "kiddose". ...Read more

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Is it safe for me to take 75 mg of Benadryl? Each pill is 25 mg. What would be my maximum dosage? What is and what is not safe? I'm using it to sleep.

Is it safe for me to take 75 mg of Benadryl? Each pill is 25 mg. What would be my maximum dosage? What is and what is not safe? I'm using it to sleep.

100 mg?: The margin of safety is quite high although you may end up with dry mouth and even constipation at higher doses. If Benadryl at 100 mg does not put you to sleep, it is unlikely that higher dose would do the job. Consider practicing better sleep hygiene (no bright light exposure a couple of hours prior to sleeping, avoid eating late etc). If problem persists, consult your doctor. ...Read more

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Is it safe to give a 21 lb (6 mo) baby a dose of benadryl-d for congestion/allergies/sinus trouble? If so, what is the dosage? Thanks

Is it safe to give a 21 lb (6 mo) baby a dose of benadryl-d for congestion/allergies/sinus trouble? If so, what is the dosage? Thanks

Too young?: It's usually not recommended to medicate babies this young. S/he doesnt have sinuses so, please do not try to treat for 'sinusitis'. Check with your pediatrician before giving any over-the-counter med to your baby. In the meantime, you can give very small sprays of saline into baby's nose and use bulb suction to remove mucus. ...Read more

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Need to know proper dosage of children's Benadryl (diphenhydramine) for my daughter who will be 3 in july. She is 34 pounds. She has watery eyes and is sneezing! help?

Need to know proper dosage of children's Benadryl (diphenhydramine) for my daughter who will be 3 in july.  She is 34 pounds.  She has watery eyes and is sneezing! help?

6.25mg every 4-6 hrs: The typical dose of benadryl/diphenhydramine in 2-4 year olds is 6.25 mg orally every 4-6 hours for allergy symptoms. Benadryl is typically sold in liquid form as 12.5mg per teaspoon, so you would administer one-half teaspoon to get the 6.25 mg dose. Be sure to contact your physician if symptoms persist or if she begins to cough, have a fever, or anything else that concerns you. ...Read more

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What is the correct dosage for children's Benadryl (diphenhydramine) allergy for 19 month toddler 21.5 lbs? Is it ok to use Benadryl (diphenhydramine) with alubeterol/prednisone inhalant

What is the correct dosage for children's Benadryl (diphenhydramine) allergy for 19 month toddler 21.5 lbs? Is it ok to use Benadryl (diphenhydramine) with alubeterol/prednisone inhalant

1 teaspoon or 5cc's: Benadryl (diphenhydramine) can be used with the Albuterol and Prednisone. The dosage of Benadryl (diphenhydramine) for your child's weight would be about 1 teaspoon (5cc) being that the concentration of the Benadryl (diphenhydramine) is 12.5mg per each teaspoon. Remember, if your child is having breathing problems, always consult with your Pediatrician. Take care. ...Read more

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How often can I give Benadryl (diphenhydramine) to a 7 MS old baby to prevent allergies/dry runny nose? And dosage? It's it ok to apply earache drops?

How often can I give Benadryl (diphenhydramine) to a 7 MS old baby to prevent allergies/dry runny nose? And dosage? It's it ok to apply earache drops?

Every 4 hrs: Up to every 4 hrs if needed. At age 7, the baby can likely tolerate 6 mg of benadryl (diphenhydramine). No problem with ear drops. However if this problem goes on for more than 2 wks, you should contact your pediatrician. ...Read more

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I took one Benadryl 2 hours ago can I take a dose of NyQuil?

I took one Benadryl 2 hours ago can I take a dose of NyQuil?

2 young 4 HealthTap: HealthTap docs are asked not to address questions posed by individuals under 16. As an aside, however, insomnia at your age deserves medical attention, not shotgun OTC agents. ...Read more

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How long does diphenhydramine stay in your system? I took 100mg before sleep, but 12 hours later, i'm still drowsy. The more dosage, the longer?

How long does diphenhydramine stay in your system? I took 100mg before sleep, but 12 hours later, i'm still drowsy. The more dosage, the longer?

Takes a while: It sounds like it is still in your system. The half life varies quite a bit from person to person although some sources will describe a half life of around seven hours. That means that seven hours later you can still have half of the medicine in your body. As you can see, you are probably going to need more time to clear it. Stay safe! ...Read more

Benadryl (Definition)

Diphenhydramine is a sedating antihistamine which is a kind of antihistamine type drug (common ...Read more