Both the time it will take for a drug to be effective, and the time it will take for it to leave the body completely, depend on a drug's half-life. The half-life is the amount of time necessary for the concentration of the drug in the bloodstream of the body to be reduced by one-half. The time it will take for a drug to reach a steady state, or full effectiveness, in the system is based on that half-life.
Definition. An adverb is the part of speech (or word class) that's primarily used to modify a verb, adjective, or other adverb. Adverbs can also modify prepositional phrases, subordinate clauses, and complete sentences. Adjective: adverbial. Positions of an Adverb.
An adverb can also modify (describe) an adjective or another adverb. Examples: Adverb modifying a verb: He writes well; Adverb modifying another adverb: He writes very well; Adverb modifying an adjective: He is very well; In the first two examples the word 'well' is an adverb. In the last example, it is an adjective. This is one example in which the same word can be both an adjective and an adverb but not in the same sentence.