I have a hard time with the cold medicine law in CA. My 3 boys' ages necessitate the purchase of 3 different strengths of cold medicine, so when they all get colds I am prohibited from buying multiples of the 3 kinds of the medicine I want. (I do like to buy in bulk--their colds can last for 10 days easy!)
What I do is pick several different strengths of several different brands and take them all to the counter, hoping that I can patch together some combination that will pass muster. So the cashier takes away what I'm prohibited from buying.
The whole thing is pretty sad for a non-communist country.