Explanation: individuals can develop tolerance to both illicit drugs and prescription medications which occurs as a result of repeated use of the drug and the body adapts to the continued presence of the drug leading to the body becoming desensitized to the drug’s effects. As a result, the individual with a drug tolerance has to take larger doses of the drug (or source for more potent drugs) in order to achieve the same effect as they did earlier in their drug use. Tolerance is defined a person's diminished response to a drug that is as due to repeated drug use.
Explanation: When there is repeated use of drugs, the body gets familiar with the drugs and thus reduces the effects of the drug in the body. Hence, the need to increase the dosage in order to start feeling the effects again. This is exactly what is happening to Tayla in the example given above; her body system became tolerant of marijuana and she needs it in higher dosage in order to achieve the previous effect it had on her.
