Can you take Allegra D if it has expired?
Drugs lose potency as they age beyond the expiry date, but they can still be taken. They just won't be as effective as they used to be before they expired.
If Mucinex has a nasal decongestant (phenylephrine/pseudoephedrine) in it and Allegra D has phenylephrine/pseudoephedrine in it, you can not take the two together. Mucinex has a nasal decongestant in some of its products and so does allegra d so be careful not to get a double dose of these chemicals.
Yes, when I take Allegra D, it causes heart palpitate. I never noticed it before and it always seem to occur during allergy seasons. I finally realized that during allergy season, I usually take Allegra D. When I stop taking it, my palpitation disappears. Answer (2) Yes, the "D" component, pseudoephedrine, can cause palpitations. It is a common side effect.