| abortifacient |
a drug or other agent used to cause abortion. [1/2 definitions] |
| acetaminophen |
a drug used to relieve pain and reduce fever but which does not significantly reduce inflammation. |
| aconite |
the drug obtained from the root of monkshood. [1/2 definitions] |
| acyclovir |
an antiviral drug used in the treatment of herpes simplex viral infections, chickenpox, and shingles. |
| addict |
one who depends on or craves a habit-forming substance, such as a drug. [1/4 definitions] |
| aloe |
(pl.) a drug derived from the bitter juice of the aloe leaves (used with a sing. verb). [1/2 definitions] |
| amitriptyline |
a tricyclic antidepressant drug used to treat depression, attention deficit hyperactivity disorder (ADHD), and other mental disorders. |
| amphetamine |
a drug that stimulates the central nervous system, depressing appetite and heightening activity. |
| analeptic |
a drug that restores strength to the body after a disease or the use of sedatives. [1/2 definitions] |
| analgesic |
a drug, lotion, or the like that relieves pain. [1/2 definitions] |
| anaphylaxis |
extreme allergic reaction to a substance, typically a foreign protein or drug, following a previous exposure to the same substance. |
| anesthesia |
a drug or other agent used to bring about unconsciousness or absence of pain. [1/2 definitions] |
| anesthetic |
a drug that causes anesthesia in the whole body or in a localized area. [1/2 definitions] |
| antihypertensive |
a drug or other agent that reduces hypertension. [1/2 definitions] |
| antimalarial |
a drug used to prevent or fight malaria. [1/2 definitions] |
| antiperiodic |
a drug that prevents the periodic recurrence of disease. [1/2 definitions] |
| antiseptic |
a substance or drug with the ability to kill microorganisms that cause disease or decay. [1/4 definitions] |
| antispasmodic |
a drug or other substance that prevents spasms. [1/2 definitions] |
| aphrodisiac |
a substance, such as a food or drug, that arouses sexual desire. [1/2 definitions] |
| arsenical |
a compound containing arsenic that is used as a drug, herbicide, pesticide, or the like. [1/2 definitions] |
| aspirin |
a drug used to relieve pain and reduce symptoms of fever or inflammation. [2 definitions] |