Question! Where can I find Chlor-Trimeton 12hr 12mg allergy pills? (near San Diego, CA) It seems that whenever a new allergy medicine comes on the market (Claritin, Zyrtec), CT disappears for a year or so. Available in Canada as Chlor-Tripolon but only for a short while as everyone in the US starts buying it on-line when CT disappears. This time, I haven't noticed any new product roll-out. Question 2- WHY does it disappear? I've been taking it regularly for over 50 years and only recently (last few years) has it been doing this disappearing act. ## I second Phils question. Chlor-Trimeton 12hr is very good for me. Why does it keep disappearing here in Michigan too! ## I just noticed Allegra became OTC(over the counter). Chlor-Trimeton always disappears when a new allergy product ...