Doctor insights on:
What Is The Highest Dose Of Antihistamine I Can Take
Can you take generic multi symptom nighttime medicine with nighttime Thera-Flu? I don't usually get drowsy from just one dose of antihistamine. I have adhd so it's hard for me to get sleepy from that. So is it okay to take both?
No: Those preparations contain multiple drugs similar to thera-flu, the problem isn't with antihistamines only, other components could interact, or interact with whatever medicines you are on or if you are under treatment for adhd, please consult your doctor and read the labels carefully, good that you asked, always exercise caution with multiple medications, ...Read more
Antihistamines: Safety of high dose medications is often unknown. Our experience comes from case reports of persons who intentionally or accidentally consumed unusually excessive quantities. When Claritin (loratadine) was first investigated, safety studies were done at 40 mg (4 times the current recommended dose). We take 10 mg because effectiveness is not significantly different between 10 mg and 40mg. ...Read more
How long will it take for prolactin levels (17.5 in male) to drop after discontinuing high doses of antihistamine for three consecutive months that caused elevated numbers? Will hair stop shedding?
Is it bad to take an antihistamine during a cold, i.e. does suppressing mucus make the cold last longer?
No value: Antihistamines have no value in the treatment of viral illnesses. ...Read more
Unclear: Different antihistamines have different potencies. 10 mg of Zyrtec is equivalent to 180mg of Allegra (fexofenadine). Mg doseage as in all medicines are drug specific. In regard to toxic levels, each has its own known limit. However, too much antihistamine can lead to deadly arrythmias/ Please use the recommended dose. ...Read more
I know it is not recommended to take more than one antihistamine pill per 24 hours, but some only last ~8 hours. Which one's lasts for 24 hrs?
Yes: Taking antihistamines with betablockers like propranol is typically very safe. ...Read more
Depends: Most people respond best to zyrtec or xyzal, (levocetirizine) as long as they don't get drowsy with them. Everybody reacts differently to different antihistamines, though; most people with urticaria will try many of the available antihistamines, alone or in combination, under a physician's supervision, to get the best control of their hives. ...Read more
Yes. : Yes. They will not interact in a negative way. ...Read more
Probably: It should be O.K. To take both of them together, but be aware of possible oversedation or drowsiness with them. Also, monitor the effects they have on you before you drive or operate other machinery. You may need to have the dose of your antihistamine lowered or take it temporarily if you do experience side effects. ...Read more
Xanax (alprazolam): I would not recommend it, due to excess sedation. If antihistamines are taken on an as needed basis, & your doctor is aware, it may be ok. ...Read more
Yes: Yes. You could take those medications together without any problems. ...Read more
Yes but...: Antihistamines can be taking twice a day safely if required but there are other treatments available. If by allergic reaction you are referring to seasonal allergies, the gold-standard therapy is daily nasal steroid sprays and/or antihistamine nasal sprays. Nasal saline rinses, avoidance measures, and if refractory to treatment, allergy shots can also be helpful. See an Allergist for more details. ...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
Antihistamines are traditionally used to treat allergic reactions. I am curious as to what exactly what happens to you in response to specific antihistamines: benadryl, (diphenhydramine) zyrtec, Claritin etc.
Pepcid is a medication that inhibits acid production by the stomach and would be helpful for treatment of heartburn, indigestion (dyspepsia) , gastitis (stomach inflammation) or reflux of acid ...Read more
Yes but why: If you take two antihistamines at once you will bring out the less desirable side effects such as drowsiness and dry mouth. There is really no benefit from this and could lead to an overdose if you did this long term. It's best to take one at a time give it a few days to determine if that antihistamine is working and if not change to another. ...Read more
Antihistamines: You should follow the prescription given to you or the maximum amount on the medication insert, do not self medicate. If higher doses are necessary, they should be guided by an experienced allergist. ...Read more
Probably not: Antihistamines are one of the safest classes of medications and have been available since the 1940s. At usual doses, there is very few side effects and no harm that will come from taking an antihistamine, especially the newer generation ones such as claritin, clarinex, zyrtec, xyzal (levocetirizine) or allegra. ...Read more
Here are some...: Both Amiodarone and ramipril are used for irregular heart beat and high blood pressure, and antihistamine, theoretically, should not have direct adverse side effects with the above both drugs. But, as we age, our functional reserve declines so becoming more vulnerable to additive effects from multiple drug use. Hence, ask your doc first so to minimize unwanted side effects. ...Read more
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