There are many hundreds of thousands of possible drugs. Any chemical substance with biological activity may be considered a drug. This list categorises drugs alphabetically and also by other categorisations. List of lists of drugs General List of bestselling drugs List of drugs by year of discovery List of drugs that can be smoked By chemical structure List of 2C-* drugs List of benzodiazepines List of cocaine analogues List of methylphenidate analogues List of antidepressants List of DO* drugs List of androgen esters List of corticosteroid esters List of estrogen esters List of tetracyclic antidepressants List of tricyclic antidepressants List of substituted α-alkyltryptamines List of substituted amphetamines List of substituted benzofurans List of substituted cathinones List of substituted methylenedioxyphenethylamines List of substituted phenethylamines List of substituted tryptamines List of lysergimides By biological activity List of androgen esters List of androgens/anabolic steroids List of anaesthetic drugs List of antiandrogens List of antibiotics List of antipsychotics List of antiviral drugs List of corticosteroid esters List of corticosteroids List of designer drugs List of drugs affected by grapefruit List of estrogen esters List of nasal decongestants List of nonsteroidal anti-inflammatory drug List of opioids List of progestogens List of psychedelic drugs List of psychotropic medications List of selective estrogen receptor modulators List of tetracyclic antidepressants List of tricyclic antidepressants Investigational List of investigational analgesics List of investigational antidepressants List of investigational antipsychotics List of investigational anxiolytics List of investigational hallucinogens and entactogens List of investigational obsessive–compulsive disorder drugs List of investigational sex-hormonal agents List of investigational sexual dysfunction drugs List of investigational sleep drugs By medical application List of drugs known for off-label use List of psychiatric medications List of psychiatric medications by condition treated List of veterinary drugs By other institutional aspects List of approved antidepressants List of controlled drugs in the United Kingdom List of drugs banned from the Olympics List of Schedule I drugs (US) List of Schedule II drugs (US) List of Schedule III drugs (US) List of Schedule IV drugs (US) List of Schedule V drugs (US) List of withdrawn drugs List of World Health Organization Essential Medicines See also Channel modulator, for links to articles referring to drugs that modulate ion channels. List of monoclonal antibodies List of off-label promotion pharmaceutical settlements List of schedules for drugs and poisons List of steroid abbreviations