A
Abortifacients
Accutane
Acetylsalicylic acid (use: Aspirin)
Agent Orange
Alcoholic beverages
Alcohols
Amino acids
Amphetamines
Anabolic steroids (use: Steroids)
Analgesic drugs
Anesthesia
Angel dust (use: PCP)
Antibiotics
Anticonvulsive drugs
Antidepressant drugs
Antiinflammatory drugs
Antipyretic drugs (use: Antiinflammatory drugs)
Artificial sweeteners (use: Sweetening agents)
Ascorbic acid
Aspartame
Aspirin
AZT (use: Zidovudine)