http://www.77canadapharmacy.com/Drixoral.phphttp://en.wikipedia.org/wiki/Dexbrompheniramine 3-(4-bromophenyl)- N,N-dimethyl- 3-pyridin-2-yl-propan-1-amine
http://en.wikipedia.org/wiki/Brompheniramine 3-(4-bromophenyl)-N,N-dimethyl-3-pyridin-2-yl-propan-1-amine
products (Bromfed, Dimetapp, Bromfenex, and Dimetane)
http://en.wikipedia.org/wiki/Chlorphenamine 3-(4-chlorophenyl)-N,N-dimethyl-3-pyridin-2-yl-propan-1-amine
Chlor-Trimeton
I don't know if you can still buy Chlor-Trimeton with pseudoephedrine but they used to sell a Chlor-Trimeton D with both.
You can still buy Chlor-Trimeton & pseudoephedrine separately since they used to put them together it should be safe to take one of each separately.I know this is not Drixoral but might make a fair substitute.
From what I read Drixoral is moving their manufacturing plant so it will be available again.If that's really the truth.I think the pharmaceutical companies really want people to use the newer antihistamines like Claritin (to make more money).So may be phasing out the old ones.
I couldn't find Dexbrompheniramine or Brompheniramine by itself but you might ask a pharmacist or doctor if there is an OTC that is just one of those.Then add the pseudoephedrine as a separate pill.
The pseudoephedrine is the one they use to make meth.So it's the main problem.
Hope this helps.