Loratadine let me down

Last week I had to suffer though a sinus infection, and I took plenty of drugs to deal with it. From my days of working at Eckerd's, I generally take the same things I have for years to treat each symptom separately, but I thought I would try out Loratadine (generic over-the-counter Claritin) for a change this time. I can remember when Claritin was first available - lots of folks I knew had prescriptions and were taking it everyday, since it was the first (or one of the first) antihistamines without the usual drowsiness. Anyway, I had always heard it was great, but for me, it was completely ineffective. Guess my snot is just trained for Benedryl! Actually, I used to have the best results with Dimetapp antihistamine tablets, but they don't even make those anymore - I miss those magic blue pills.