Can Cetirizine be harmful?

[tryptonaut]

I'm asking because I'm sometimes taking Reactine Duo pills because they contain pseudoephedrine.
I don't care for the Cetirizine (an antihistamine that's useful against allergies) I only care for the pseudoephedrine.
The effect is good because the pills contain 120mg pseudoephedrine hydrochloride, that's quite something - you can either swallow them as is (time released) and get a small boost for many hours, or you can crush them and get a strong ephedrine boost immediately.

I know about the dangers of ephedrine (blood pressure, heart rate etc.) but I have no idea if cetirizine can be harmful if taken too often. I mean on the package it says take them for 2-4 weeks (which is usually the time frame of an allergic reaction to certain pollen). Can the stuff be harmful if I take it like once or twice a week for a longer period of time?
The pills contain 5mg of cetirizine each, which is, as far as I have found, not a high dose.

 

[Arcticpheonix]

I looked at http://www.drugs.com/cetirizine-hcl.html and it didn't really mention much in the way of long term effects. It's short term side effects looked pretty normal (you're usual placebo stuff) with the few more serious things you'd expect (uneven heartbeat, restlessness, etc.). I'd say that if you're THAT worried, you could look into how to extract the Pseudoephedrine. It's used to make meth (I think...or something like that) so any guide that tells you how to make that will include how to extract the pseudoephedrine. Of course this is WAY illegal in most places so I won't tell you to do it, but this is how it could be done if one wished to.