The main concern with pharmaceutical drugs is adverse effects, which also apply to<unk> s with undefined effect. Long-term safety evidence is typically unavailable for<unk> s. Racetams, piracetams, and other compounds that are structurally related to piracetam, have few serious adverse effects and low toxicity, but there is little evidence that they enhance cognition in people having no cognitive impairments. In the United States, dietary supplements may be marketed if the manufacturer can show that the supplement is generally recognized as safe, and if the manufacturer does not make any claims about using the supplement to treat or prevent any disease or condition; supplements that contain drugs or advertise health claims are illegal under US law.
Nootropic
Dromotropic
Chronotropic
Bathmotropic
Holocrine
Anxiotropic
Uterotonic
Parasympatholytic