Phenomenon of declining physiological effects of taking a drug after sustained use is referred to

Drug tolerance.

Explanation:

Drug tolerance occurs when an individual has taken drugs at a certain dosage continuously, causing its effects to decrease over time. Thus, to create the same effects, the individual must increase their dosage.

Unfortunately, a side effect from doing this is the possibility of drug dependence or addiction. However, it is possible manage the drug use responsibly to avoid drug tolerance by taking drug holidays - when an individual chooses to not take his or her drugs to decrease the risk of tolerance.

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i don't think so because different teachers have different materials. tehy teach differently, unless you know for sure your teacher is the exact same as others. i would just contact ur teacher