Affiliate commission varies greatly from one program to another. Greatest commissions are usually offered by so called "higher risk" merchants - in pharmacy, gambling and adult industries. Here commission rate usually equals 20-25%, in some cases and on individual basis reaching even fantastic 35-40% for some of the most "advanced" partners.
In my opinion, what is good about pharmacy is that it can be promoted at absolutely any website, with any content - maybe, not specifically related to healthcare. And unlike porn or gambling - this will not spoil your reputation, because pharmacy is considered reputable business.
And what's your opinion? What type of affiliate programs you join? What are main PROs and CONTRAs?
Best regards, Seopharmacy