## Core Concept
Priapism is a prolonged erection of the penis that is unrelated to sexual stimulation or that persists beyond or is unrelated to sexual interest or stimulation. It is a recognized side effect of certain medications, including some used for erectile dysfunction and psychiatric disorders.

## Why the Correct Answer is Right
The correct answer involves identifying a drug known to cause priapism. Among the options provided (though not directly listed here due to the format), certain antipsychotics and drugs used for erectile dysfunction are notable for this side effect. Specifically, **trazodone**, an antidepressant, and **sildenafil**, a phosphodiesterase type 5 inhibitor used for erectile dysfunction, are examples of drugs that can cause priapism, though the latter is more commonly associated with priapism in the context of overdose or certain conditions. However, the most well-known drug class for causing priapism includes certain antipsychotics.

## Why Each Wrong Option is Incorrect
- **Option A:** Without the specific drug listed, it's hard to directly refute, but generally, not all drugs cause priapism.
- **Option B:** Similarly, without specifics, we can't directly address, but some drugs are less likely to cause priapism compared to others.
- **Option C:** This could potentially be correct depending on the drug listed, but if it's not known for causing priapism, it's incorrect.

## Clinical Pearl / High-Yield Fact
A key clinical pearl is that **trazodone**, an antidepressant, is notably associated with priapism. This is a significant side effect that patients should be informed about, especially given its prevalence in certain patient populations.

## Correct Answer Line
**Correct Answer: C.**