Doctor insights on:
Allegra D Not Digesting
Fexofenadine is an antihistamine which is used to treat allergies such as hayfever, and hives. It can be taken once or twice a day. It is a second generation antihistamine and does not cause as much drowsiness as other antihistamines such as Diphenhydramine (benaryl) or chlorpheniramine. Always be careful about drowsiness with any antihistamine especially if driving ...Read more
Forever: You can take it indefinitely at the recommended dose. ...Read more
Yes- what symptom?: Allegra d is a combo of fexofenadine and pseudoephedrine. The 12-hour preparation has 120 mg of sudafed in it, a lot of decongestant, if you are sensitive. This causes the jitters, and may cause the nausea. If your main symptom is congestion, the answer could be no. If itching, sneezing, etc, try plain fexofenadine. Nasal prescription sprays also work and have less side effects because local only. ...Read more
Allegra (fexofenadine) d is a combination of non drowsy antihistamine and pseudo Ephedrine (sudafed). For many people decongestant portion causes jitteriness. Since it is a fixed combination with a slow releasing high dose of pseudoehedrine you have no control over the higher dose. You may try allegra, (fexofenadine) and add sudafed
(30 mgm) separately and tolerate it better. May not cause nausea. ...Read more
Insomnia, jitters: Allegra d contains 2 drugs. Fexofenadine usually has few side effects, but can be drying to the nasal membranes and mouth, and can have side effects, so check further if you have some. The d portion, on the other hand, is sudafed, and it commonly causes jitters, insomnia, fast heart rate, nausea and headache. It can raise the blood pressure and cause arrhythmias. ...Read more
Allergy: Yes you can take it every day. There should be no long term effects ...Read more
I accidently took 2 24hr Allegra d how long will it stay in ur body? I been having side effects for over a week.
1-3 days at most: If you are having side effects after one week since taking this dose then there must be another explanation for your symptoms. Try asking another question entering these persistent symptoms or you could see your regular doctor for an explanation. ...Read more
I accidentally took 2 Allegra-D; 1@ 10pm and 1 @ 6:30am today. Should I worry? Just feeling a little woozy, but otherwise ok.
I am 25, healthy. Took allegra d 24 hours (240mg pseudoephedrine) within 20 hours of my last dose. Is there anything to be concerned about?
No: There should not be any problems.Get a more detailed answer ›
I've been taking Allegra D daily for years & it helps a lot with my allergies. Is long term Pseudophedrine use bad? What about developing a tolerance?
Fortunately this product has been around for many years. It is ALWAYS best to stop a medication if you can. Try Breakfast in Bed. Hot tea, etc BEFORE you get out of bed might prevent allergy symptoms.
Personally I prefer nasal type sprays because their effect is limited to nose only, not to entire body. ...Read more
Yes you can, however:
If you are taking the tylenol pm to help you sleep, it might not work in case you are taking the allegra-d 24 hours, but if taking the allegra-d 12 hours in the morning then the tylenol pm would work at night.
Good that you asked, always exercise caution with multiple medications ...Read more
Antihistamine differ: They are not. Both are over the counter antihistamines. The similarity ends there. Allegra d contains Pseudoephedrine as a decongestant and fexofenadine as an antihistamine. Fexofenadine is non-drowsy. Benadryl is also an antihistamine called diphenhydramine. It is also the active ingredient in most otc sleeping pills and can be very sedating. ...Read moreSee 1 more doctor answer