Trihexyphenidyl (Artane)Chemotherapy and hormonal medicines:
Antiandrogens (Casodex, Flutamide, Nilutamide)
Busulfan (Myleran)
Cyclophosphamide (Cytoxan)
Ketoconazole
LHRH agonists (Lupron, Zoladex)
LHRH antagonist (Firmagon)
Other medicines:
Aminocaproic acid (Amicar)
Atropine
Clofibrate (Atromid-S)
Cyclobenzaprine (Flexeril)
Cyproterone
Digoxin (Lanoxin)
Disopyramide (Norpace)
Dutasteride (Avodart)
Estrogen
Finasteride (Propecia, Proscar)
Furazolidone (Furoxone)
H2 blockers (Tagamet, Zantac, Pepcid)
Indomethacin (Indocin)
Lipid-lowering agents
Licorice
Metoclopramide (Reglan)
Nonsteroidal anti-inflammatory drugs (NSAIDs, ibuprofen, etc.)
Orphenadrine (Norflex)
Prochlorperazine (Compazine)
Pseudoephedrine (Sudafed)
Sumatriptan (Imitrex)
Opiate analgesics (painkillers):
Codeine
Fentanyl (Innovar)
Hydromorphone (Dilaudid)
Meperidine (Demerol)
Methadone
Morphine
Oxycodone (Oxycontin, Percodan)
Recreational drugs:
Alcohol
Amphetamines
Barbiturates
Cocaine
Marijuana
Heroin and other opioids
Nicotine