Not an ad, just my experience: I googled the company, Valisure, that was mentioned in this article and another in the NYT. In addition to selling drugs that they've tested, they'll also take a sample and test your own prescriptions. Price is $40 for their "impurities/carcinogen" analysis. Worry may well be overblown at this point, but my kid was prescribed ranitidine and some peace of mind is worth 40 bucks to me.