Final answer:
Amanda is most likely experiencing substance withdrawal, which is characterized by negative symptoms that occur when drug use is stopped. These symptoms can be physical and psychological. Resuming drug use often provides relief from these symptoms.
Step-by-step explanation:
Amanda is most likely experiencing substance withdrawal due to her attempts to discontinue her use of opiates. Substance withdrawal refers to the negative symptoms that occur when drug use is stopped, and it can include physical symptoms such as pain, tremors, and seizures, as well as psychological symptoms like anxiety, depression, and hallucinations. Amanda's decision to resume taking drugs in order to alleviate these symptoms is a common response to withdrawal, as the symptoms usually stop when the drug is consumed again.