addictive (adjective) - causing a person to have a physical need for the drug

mind-altering drug (noun) - substance that changes a person's state of mind

dependent (adjective) - having a need for

to consume (verb) - to eat, drink, use, etc.

to ingest (verb) - eat; consume; put into your body

approximately (adverb) - about; close to

tends to (verb phrase) - is likely to; probably

to take in (verb phrase) - put into the body; to ingest; to consume

alert (adjective) - aware; awake; paying attention

doses (noun) - amounts; quantities; measures (of a drug)

anxiety (noun) - worry; concern; stress; tension

benign (adjective) - harmless; not dangerous

distinction (noun) - difference; something that makes them not alike

withdrawal symptoms (noun) - negative effects that you experience when you stop using a drug you have used for a long time

lethargy (noun) - tiredness; lack of energy; laziness; sleepiness

condition (noun) - situation; state of being

criteria (noun) - standards; requirements

gradual (adjective) - slow; little by little

tolerance (noun) - the drug no longer has as big an effect on your body

persistent (adjective) - continuous; constant; steady; not giving up

to aggravate (verb) - to make worse; to irritate; to cause more problems

to give up (verb phrase) - to stop using it

full-fledged (adjective) - total; complete

unpleasant (adjective) - painful; bad; not fun; not nice to experience

caution (noun) - carefulness; care

to kick a habit (phrase) - to stop doing something that you do often or are addicted to (e.g. smoking, biting your fingernails, etc.)

cold turkey (phrase) - all at once; suddenly

tapering off (phrase) - decreasing slowly