Allegra-D 24 hour tablets are sold behind the pharmacy counter in most US states without needing a prescription*. Please contact your local pharmacy to learn more. *Prescriptions are needed in Mississippi and Oregon.

The chances of experiencing drowsiness with Allegra are very low. In fact, it's one of the antihistamines that's least likely to make you feel sleepy. But drowsiness with Allegra is still possible. The risk of drowsiness is higher if you also take other medications that make you tired, or if you drink alcohol.

It contains a decongestant that works to reduce swelling of nasal passages, helps break up tough nasal congestion, and eases sinus pressure caused by allergies or the common cold. That is why it's the #1 allergist recommended non-drowsy allergy brand.

Also, if you're used to taking Allegra in the morning, try switching to a bedtime dose. You're less likely to be drinking juice that time of night, and some studies have shown that gives you peak control just when you're waking up the next morning.

Q: Is Allegra-M Tablet a steroid? A: No, the components of this tablet are not steroids. They are anti-allergic medicines and reduce allergic reactions such as running nose, sneezing, itching, etc.

Skip Short-Acting Allergy Meds at Night Some medications for treating allergies, like Zyrtec (cetirizine) and Allegra (fexofenadine) last 24 hours and don't need to be taken at night.

The chances of experiencing drowsiness with Allegra are very low. In fact, it's one of the antihistamines that's least likely to make you feel sleepy. But drowsiness with Allegra is still possible. The risk of drowsiness is higher if you also take other medications that make you tired, or if you drink alcohol.

“Antihistamines help with itching and sneezing, but alone do nothing to help the congestion that keeps you up at night.” Decongestants are the “D” part in allergy medications like Allegra-D®, but they can have a stimulant effect that disrupts sleep in some people.

Taking too much fexofenadine (Allegra) or using more than one medication containing an antihistamine (including products used on the skin) can lead to an accidental overdose. This can cause serious side effects, such as seizures, hallucinations, or even death.

Newer antihistamines like Allegra and Claritin are generally safe for daily use. But allergy medications with decongestants, such as Claritin-D or Benadryl-D, could make your allergies worse with long-term use.

Allegra generally starts working about 1 hour after you take it. The effects of a 60 mg dose last about 12 hours, and a 120 mg or 180 mg dose last about 24 hours. Claritin begins to work about 1 to 3 hours after you take it, and the effects of a 10 mg dose last about 24 hours.

Newer antihistamines like Allegra and Claritin are generally safe for daily use.