Doctor insights on:
Taking Antihistamines Everyday
Is taking antihistamine everyday bad for you in the long term? Will my immune system get impaired?
No and no.: There are no known longterm sequellae from antihistamines. I would stick with the long-acting, non-sedating ones, such as Allegra and Claritin, (loratadine) since the short-acting ones can make you drowsy. Antihistamines do not affect the immune system in any measurable way. ...Read more
My husband is always suffering fron rhinitis and always taking loratadine antihistamine almost everyday. Is it safe? Is there some other med that will cure his rhinitis?
Here are some options
Taking loratadine long term is safe. He could also try other antihistamines. Steroid nasal sprays are also safe to use long term and often more effective. Allergy testing may reveal avoidable triggers. The only treatment that even comes close to a cure is allergy immunotherapy. See an allergist to find the best option for your loved one. ...Read more
Antihistamines: At night should not have any effect on how well they work the next day. People don't get desensitized to antihistamines, though a lot think they do. If you are taking Benadryl (diphenhydramine) at bedtime, don't expect it to take care of you the next day though, as it is a short acting medication. ...Read more
Taking lethal over: Dose would do that. Lethal overdoses of antihistamines are rare. Are you considering taking an overdose of antihistamines? If so, please get help right away. You can use national suicide hotlines 24/7 at 1-800-suicide (1-800-784-2433) or 1-800-273 – talk (1-800-273-8255). If you have accidentally taken too many antihistamines please contact 1-800-222-1222 (poison control hotline). Take care. ...Read more
Yes: The drug will not affect the success of the vaccination or cause any negative reaction. ...Read more
Yes you scratch less: Antihistamines are one of the important medications that we use for eczema or atopic dermatitis. The condition starts with itching, which leads to scratching, which causes a rash to develop, and then there is more itching and a vicious cycle ensues. Antihistamines are used to decrease the itching. Sedating antihistamines can be used at night to help decrease scratching while asleep. ...Read more
Yes: I am not going to judge whether smoking weed is ok or not but if smoking weeds makes you drowsy and you are taking a sedating antihistamine such as Benadryl (diphenhydramine) or atarax, the sedating effects may be additive. Antihistamines, especially the non-sedating ones, usually have a good safety profile. ...Read more
Yes: Generally yes. However, benzonatate can cause drowsiness. The first generation antihistamines (such as benadryl, (diphenhydramine) doxepin, chlorpheniramine, and hydroxyzine), can also cause drowsiness. Hence, the affect could be additive. With that in mind, you might want to consider taking a second generation antihistamine such as cetirizine, xyzal, fexofenadine, etc. ...Read more
Food testing: Food intolerance testing is not scientifically based, meaning this is not a good test. The best test for food intolerance is to eliminate one food at a time to see if symptoms improve. Food allergy testing (specific IgE testing via blood or skin) is a scientifically validated test and is used for patients with history of hives, itching, swelling, wheezing, coughing, vomiting, etc soon after eating ...Read more
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
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?
2 days of hive outbreak has gotten worse - unsure what caused it but this is not the 1st time. Been taking off-brand antihistamine to no effect. Help!
See a dermatologist: May be allergy. Maybe not. Zyrtec (cetirizine) (cetirazine) OTC 10mg. May need 2 or 3. Larger dose can make you sleepy. If severe, add prescription hydroxyzine 25mg at bedtime. If present over 6 weeks it is chronic urticaria which is usually not allergy. Avoid aspirin, alcohol. Beware of any and all pills or meds of any kind. Need precise diagnosis for best result. ...Read more
Older ones do:
First generation antihistamines (benadryl, clor-pheramine, atarax) cross the blood brain barrier and cause lethargy.
Second generation (allegra, claritin, zyrtec, xyzal, (levocetirizine) clarinex) cause the blood brain barrier at a much lesser amount and more targeted to the h1 receptor. ...Read more
Yes but why: Although antihistamines are a very safe class of medications, the better question is why is there a need to take them daily? If antihistamines are being taken for treatment of nasal symptoms, see an allergist to identify the trigger. ...Read more
Several are good: Loratedine (Alavert, Claritin), Cetirizine (Zyrtec)and Fexofenadine (Allegra)are all effective. Dyphenhydramine (Benadryl) is short acting so if you want the reaction not to come back in the middle of the night then one of the above would be better. Remember that you should not give children under 2 antihistamines without checking with your doctor. Between 2-4 y/o you should also ask. Not for colds ...Read more
There are two important considerations. Efficacy and side effects. Caution must be taken with combination meds (antihistamines along with decongestants). Men with prostate issues and anyone with cardiac/BP issues.
Also glaucoma can be affected especially by first generation antihistamines such as Benadryl (diphenhydramine). Best bet, ask your doctor :-) ...Read more
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