generic make me sleepy - brand name doesn't?
May 6, 2011 10:40 AM Subscribe
Why would a *generic* version of an antihistimine make me drowsy when the brand-name version does not?
posted by xetere to Health & Fitness (14 answers total) 1 user marked this as a favorite
I've been taking Zyrtec for a while to help with my allergies. Never made me drowsy. My wife bought the generic version and I am spacy. I understand that some people do get drowsy from Zyrtec, but I never did. Since the active ingredient is the same (Cetirizine) I would think that I wouldn't get spacy from the generic version.
So why would generic make me spacy. I am assuming that the inert ingredients and fillers are different, but how different could they be? Wouldn't it just be starch or similar?
And yes I did check the label to make sure the generic didn't have Cetirizine and some old antihistimine that would knock me out. Active ingredients are exactly the same.
So yeah, I am going back to name brand, but I am really curious what would cause the different reactions when the actual medicine component is the same. Are there different *flavors* of Cetirizine, or would fillers cause such different effects?