The amphetamine containing drug Adderall is used by college and high-school students as a study and test-taking aid.
Opiate dependence even after short term use is can develop especially if a person uses a lot of opiates or even uses opiates occasionally over a long period of time.
Antidepressant discontinuation syndrome is more likely with a longer duration of treatment and a shorter half-life of the treatment drug.
Opiates act directly on the respiratory center in the brainstem, causing a slow in activity resulting in a decrease in breathing rate.