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Doctor insights on: Older Antihistamines

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Now knowing that older antihistamines like hydroxyzine make you gain weight, how soon after I stop taking it will I start to lose the weight?

Now knowing that older antihistamines like hydroxyzine make you gain weight, how soon after I stop taking it will I start to lose the weight?

Depends: Once your appetite returns to normal, you will have to eat less (particularly carbs) and exercise more to lose the weight which was gained. The speed of loss depends on how much less you eat and how much more you exercise. ...Read more

Benadryl (Definition)

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


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Can i give my 5 yr old an antihistamine before eating out for fear that might eat foods not allowed for him because he has allergies

Can i give my 5 yr old an antihistamine before eating out for fear that might eat foods not allowed for him because he has allergies

Benadryl (diphenhydramine) or Epipen: Which antihistamine are you planning to give? And do you know what they're allergic too? Most times you only give antihistamines if you know your going to be exposed to an allergen. If you feel you must give one, do not give Benadryl (diphenhydramine) until age 6. The other problem with medicating children is that adults tend to give to much. My advice is to get a prescription for Epipen to use for emergencies... ...Read more

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Im a 23 year old male and antihistamines completely knock me out to the point where its hard to wakeup. Im on the smaller side so could that effect it?

Im a 23 year old male and antihistamines completely knock me out to the point where its hard to wakeup. Im on the smaller side so could that effect it?

Different med: Most antihistamines are based on age rather than weight. Also, first generation (old) antihistamines commonly cause drowsiness. Most people do not have drowsiness with the new generation antihistamines such as claritin, (loratadine) zyrtec, allegra. However, for whatever reason, some people are sensitive to usual doses. A lower dose could be tried, or an allergist can assist with other therapies. ...Read more

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I gave expired antihistamine syrup to my 30 months old son incidentally...Is it dangerous?What s the side effect on him?

I gave expired antihistamine syrup to my 30 months old son incidentally...Is it dangerous?What s the side effect on him?

Expired drugs: There should be no side effects as expiration is usually based on loss of drug effectiveness. Drug companies err on the side of shortening times to expiration. Actually many drugs are effective long after expiration dates. Expired drugs are commonly used effectively by volunteer organizations when no other drugs are available. Relax! ...Read more

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How old does a kid have to be to start using antihistamines?

How old does a kid have to be to start using antihistamines?

Antihistamine & baby: Some babies receive antihistamines in utero. Benadryl (diphenhydramine) was shown to be safe in pregnancy by a class action suit being brought against it failing to show any deformities that were unexpected compared to the rest of the population. But before using any antihistamine in a tiny baby, check with your doctor. Don't use antihistamines for colds. They make secretions thick and increase sinus infection. ...Read more

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What damage can antihistamines cause to 12 year old if giving without proper cause?

What damage can antihistamines cause to 12 year old if giving without proper cause?

Fatigue: Benadryl (diphenhydramine) can cause fatigue from overuse in most people. Claritin does not usually have this issue. Antihistamines also can cause urinary retention due to their anticholinergic effects. As with any medication, they should only be taken if their benefits outweigh their risk for the problem being treated. If someone has significant allergy symptoms, taking a non-sedating antihistamine is helpful. ...Read more

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Which antihistamine is safe for a 2 week old infant for Allergy ?

Which antihistamine is safe for a 2 week old infant for Allergy ?

None: None that I am aware of. I am not sure he has an allergy either at 2 weeks of age. He may instead just have a cold. I would just use a gentle nasal saline spray and use a suction device like Nosefrida. My wife uses it on our 3 year-old. Use a cool mist humidifier too. And, have him see his pediatrician if no improvement. Most drugs used in infants starts at 2 years of age. ...Read more

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Is there an antihistamine i can safely give to my 11 month old to stop the sneezing?

Zyrtec (cetirizine): A half a teaspoon for Cetirizine or zyrtec (cetirizine) a day should help, but if the sneezing is from a cold, it will not help. ...Read more

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I have aquagenic urticaria is there anything else I can do other then just antihistamine everyday? I have had it for 12 years now. 20yr old female

I have aquagenic urticaria is there anything else I can do other then just antihistamine everyday? I have had it for 12 years now. 20yr old female

No: There is no cure for this condition which may subside by itself with time You are taking benadryl (diphenhydramine) which often makes people drowsy and tired. Consider trying Zyrtec or Allegra instead and you will likely have a better quality of life. ...Read more

Dr. Paul Carter
601 doctors shared insights

Antihistamine (Definition)

Sedating and non-sedating antihistamines prevent and treat allergic reactions, and are ...Read more