How long after taking 1 equate allergy relief pill can i drink a beer?

Whenever: there are no contraindications to alcohol in using Zyrtec (cetirizine) (certrizine) which is a non-sedating antihistamine. Especially if you are truly talking about ONE beer. I always worry, thought, about people who need to know when they can drink something after drug X, or surgery Y. When people are that focussed on drinking, I think it may be an indicator of an underlying problem. Think about it.