This link seems to detail all of the possible side-effects: http://www.nlm.nih.gov/medlineplus/druginfo/meds/a602016.htm... — I think many would agree some of the side-effects which include; difficulty breathing or swallowing, swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs, anxiety, depression are definitely serious. And I would also argue that even though some of the other side-effects like skin peeling, rashes and whatnot aren't as serious, they're still pretty bad side-effects.
It's rare that most drugs these days don't have a potential side-effect or two, but if you don't need to take these pills I think there's no point in potentially risking some serious health issues like depression as a result of taking something you don't need.
Increased immune response (including heightened sensitivity to existing allergens, and potentially developing new ones), raised body temperature, general dehydration, and erratic pulse, especially if used as a sleep replacement instead of as a waking-hours enhancement.
It's rare that most drugs these days don't have a potential side-effect or two, but if you don't need to take these pills I think there's no point in potentially risking some serious health issues like depression as a result of taking something you don't need.