RadioWestCommon Antidepressants May Be Less Effective At Higher Elevation, Study SaysRadioWestThe study tested common antidepressants on rats at different altitudes. It included drugs like Prozac, Paxil, Lexapro and Zoloft. It's a group of drugs called SSRIs that make up about 80 percent of prescribed antidepressants. Rats were given the drugs ...