A member asked:

Allergic to effexor (venlafaxine) xr.. been taking it for half a yr drs didn't know why i had rashes/itchy skin swollen etc. :-( been taking for half a year?

A doctor has provided 1 answer

Acquired allergies : Most reactions to medications including hives and dermal hypersensitivity reactions are acquired and occur after you have taken the medication for a while. Once you are allergic, if you stop and then take the medication again, the allergic reaction can happen more quickly.

Answered 5/12/2016

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