med·i·cate / ˈmediˌkāt/ • v. [tr.] (often be medicated) administer medicine or a drug to (someone): both infants were heavily medicated to alleviate their seizures. ∎ treat (a condition) using medicine or a drug. ∎ add a medicinal substance to (a dressing or product): [as adj.] (medicated) medicated shampoo. DERIVATIVES: med·i·ca·tive / -ˌkātiv/ adj.