Your friend's grandfather just had a prescription filled.When you look up the brand name for the drug on the Internet, you discover the drug primarily affects levels of serotonin in the brain.Based on this information, it is most likely that your friend's grandfather is being treated for:

Question

Quizplus · Accepted Answer

Serotonin is a neurotransmitter that regulates mood, so drugs that affect serotonin levels are often used to treat depression. While anxiety and Parkinson's disease can also involve changes in serotonin levels, they are not typically treated with the type of medication that would be prescribed for depression. Alzheimer's disease primarily affects memory and cognition, and medications used to treat it would not typically focus on serotonin levels.

Your Friend's Grandfather Just Had a Prescription Filled