I always buy for myself, well obviously, but as far as the pharmacists are concerned also.
The one time, short of buying from the same place too often, that I have got turned down for a sale, was when I had said I had a cough (and I did), but when asked by the pharmacist why I was walking with a cane, I said because my knee was killing me.
Then the fucker refused to serve me, because its an opiate painkiller, but they can only sell it for treating coughs.
I only ASKED for it, for the cough.
Plenty of other places, the pharmacist has actually told me it will help with the pain, more or less, as a side effect. Seemed pretty stupid to me, refusing to sell something because it might have a beneficial side effect...never been refused because something might have a BAD side effect, but incidentally being helpful, no, sorry, can't have it then.
I don't find they are usually too fussy here as long as you don't constantly go to the same place time after time in a short period, appearance-wise, I'm generally well dressed, but in a leather trench or small, very tight-fitting leather jacket, combat pants and newrock boots, add in the fact I'm 24, with a goatee, walk with a cane, always wear dark wraparound shades/dark aviator type goggles, have my labret pierced with a stepped/tapered metal spike and have two rings on one side of my bottom lip I am actually quite surprised they don't seem to automatically pass judgement based on that.