Abuse of central nervous system (CNS) stimulants is common. Addiction to some CNS stimulants can quickly lead to medical, psychiatric, and psychosocial deterioration. Drug tolerance, dependence, and sensitization as well as a withdrawal syndrome can occur.
The judicial branch decides what amendments are unconstitutional as well as acts of the president. However, if the judicial branch were to declare an act of the president unconstitutional, it would mean that Congress agreed to this act.
The judicial branch can declare laws passed by Congress or executive acts by the President of the United States unconstitutional, thus legally voiding them. However, all federal judges are nominated by the president and approved by the Senate. Additionally, Congress can remove a federal judge from office by impeachment.