Final answer:
A patient is likely experiencing withdrawal symptoms from oxycodone (Oxycontin) after medication discontinuation. Oxycodone is a psychoactive opioid which can cause significant withdrawal effects when stopped abruptly.
Step-by-step explanation:
A patient presenting with symptoms after discontinuation of a medication might be experiencing withdrawal effects, which are commonly associated with the discontinuation of psychoactive drugs. Among the options provided, oxycodone (Oxycontin) is an opioid medication that can cause significant withdrawal symptoms if abruptly discontinued, as physical dependence may develop with its use. The symptoms could include but are not limited to anxiety, agitation, muscle aches, insomnia, sweating, abdominal cramping, diarrhea, nausea, and vomiting.
In the context of other choices, Disulfiram (Antabuse) is used in alcohol dependency management, Clonidine (Catapres) is used for treating high blood pressure and some symptoms of opioid withdrawal, and Hydroxyzine (Vistaril) is an antihistamine with anti-anxiety effects. However, these are not typically associated with the severe physical withdrawal symptoms seen with opioids like oxycodone.