I don't know where you did your research but I never came across animal urine as a tablet excipient when I worked in the pharmaceutical industry (FYI the excipients are all the chemicals that would be left in the tablet if you took the active ingredient away.) The worst thing you're likely to find in your brufen or aspirin tablets is gelatine, and that's only a problem for veggies. However, the active ingredients in some hormone replacement therapy products are extracted from horse urine. Hormones are very complicated chemicals and this method of production is easier than synthesising them chemically. Stick to religion and leave science to the scientists.