Is this an allergic impulse to an Antihistamine?

i took one pill as I have been sneezing alot(allergies) i took one about 2 hrs ago,and in a minute i feel a bit light headed. this have happened multiple times before when I have taken 1. is this a criticism? the effect also lingers the next day(took it in PM,and again,have happened when I have taken one previously,always lingers)
Answers:
This is not an allergic reaction, just a side effect.

Just a guess, but did you thieve Benedryl (aka Diphenhydramine)? It is an antihistamine, but it is also used as a sleeping pill, so getting light headed is what you'd expect.
Yes this is most probable a reaction from the pill your taking. It doesn't sound like an allergy to the medication, but the pill may be effecting your blood pressure cause the light headed feeling you mentioned. The best entry to do is talk to your doctor about the issue, even if it's an over the counter med. Your doctor will most likely suggest another medication that may work better for you. Or you could cooperate to your local pharmacists, they can also make suggestions. Good Luck Source(s): 7 years as an EMT
Looks Like a Reaction, but Not an Allergic Reaction.
yes it is a reaction.

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