Final answer:
Relapse is likely when drug use is terminated in psychopharmacology, owing to the psychological dependence and tolerance that may develop, leading to withdrawal symptoms upon discontinuation.
Step-by-step explanation:
One of the disadvantages of psychopharmacology is that relapse is likely when drug use is terminated. This is particularly relevant in the context of drugs that are used to control psychotic symptoms, such as antipsychotics or neuroleptic drugs.
While these drugs can reduce symptoms like hallucinations, delusions, and aggressive behavior, psychological dependence may develop, and tolerance can occur, where more of the drug is required for the same effect. Upon cessation, withdrawal symptoms can appear, making it challenging for patients to stop taking the medication without experiencing negative effects, thereby increasing the likelihood of relapse.