All of the following are adverse effects of nicotinic acid except ?
## Core Concept
Nicotinic acid, also known as niacin or vitamin B3, is used to treat hyperlipidemia due to its ability to decrease LDL and triglycerides while increasing HDL levels. However, it can cause several adverse effects that limit its use.
## Why the Correct Answer is Right
The correct answer is related to the known side effects of nicotinic acid. Common adverse effects include flushing, itching, gastrointestinal disturbances (like nausea and diarrhea), and hepatotoxicity. Among the options provided, the one that does not align with these known side effects will be the correct answer.
## Why Each Wrong Option is Incorrect
- **Option A:** Flushing is a well-known side effect of nicotinic acid. It's one of the most common adverse effects, caused by vasodilation.
- **Option B:** Hepatotoxicity is another significant side effect, especially at higher doses. It can range from mild elevations in liver enzymes to severe hepatitis.
- **Option C:** Gastrointestinal disturbances are common, including nausea, vomiting, and diarrhea.
- **Option D:** This option would represent the correct answer if it describes an effect not typically associated with nicotinic acid.
## Clinical Pearl / High-Yield Fact
A key clinical pearl is that flushing caused by nicotinic acid can be mitigated by taking aspirin 30 minutes before the dose or by using a sustained-release formulation. Also, remember that nicotinic acid can cause hyperglycemia and should be used cautiously in diabetic patients.
## Correct Answer: D. Hypercoagulability
Nicotinic acid is not commonly associated with causing hypercoagulability; instead, it's known for its effects on lipid profiles and potential to cause flushing, gastrointestinal issues, and liver enzyme elevations.
**Correct Answer: D. Hypercoagulability**