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Can I take more than one antihistamine

A 50-year-old male asked:
Dr. Al Hegab
Dr. Al Hegabanswered
Allergy and Immunology 42 years experience
With caution : You can, but better be under doctor's supervision if you need more than one zyrtec tablet a day,. If nasal symptoms are bothersome, OTC steroid nas... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 26-year-old male asked:
Dr. Michael Palumbo
Allergy and Immunology 25 years experience
Xyzal (levocetirizine) and Clarinex: From experience some of the newer antihistamines such as Xyzal (levocetirizine) and Clarinex seem to be effective for longer time periods. Most antihi... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 31-year-old member asked:
Dr. Thomas Shen
Allergy and Immunology 31 years experience
Unclear: Different antihistamines have different potencies. 10 mg of Zyrtec is equivalent to 180mg of Allegra (fexofenadine). Mg doseage as in all medicines ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 34-year-old member asked:
Dr. Michael P Vaughn
Allergy and Immunology 36 years experience
Antihistamines: Safety of high dose medications is often unknown. Our experience comes from case reports of persons who intentionally or accidentally consumed unusual... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 57-year-old female asked:
Dr. Justin Greiwe
A Verified Doctoranswered
Allergy and Immunology 14 years experience
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 sea... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 19-year-old female asked:
Dr. John Chiu
Allergy and Immunology 59 years experience
Likely Ok: Antihistamines have a high safety margin although the older antihistamines may have more side effects. It is unusual to have mistakenly taken 3 pills ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 45-year-old member asked:
Dr. John Chiu
Allergy and Immunology 59 years experience
Yes: Antihistamines are well tolerated even when the dose is doubled.
Created for people with ongoing healthcare needs but benefits everyone.
A 47-year-old member asked:
Dr. Steven Hill
Family Medicine 25 years experience
Yes: Actifed is more of decongestant. Yes it may harm you.
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old male asked:
Dr. Oscar Novick
Pediatrics 60 years experience
Zyrtec (cetirizine): You can take another xyrtec but you may become very sleepy.
Created for people with ongoing healthcare needs but benefits everyone.
A 22-year-old female asked:
Dr. Al Hegab
Dr. Al Hegabanswered
Allergy and Immunology 42 years experience
No: Those preparations contain multiple drugs similar to thera-flu, the problem isn't with antihistamines only, other components could interact, or intera... Read More
Created for people with ongoing healthcare needs but benefits everyone.
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