Question

Which of the following vitamin at higher doses causes cystoid macular edema ?

• A. Vit A
• B. Vit D
• C. Vit E
• D. Niacin

Answer 1

The Correct Option is D

Cystoid macular edema is a condition that involves swelling of the macula, which is part of the retina in the eye. This condition can be caused by various factors, including certain medications or supplements.

Among the vitamins listed, it is Niacin, also known as Vitamin B3, that at higher doses is known to cause cystoid macular edema. Niacin is used in the treatment of hyperlipidemia, but at high doses, it has several potential side effects related to the eyes, including macular edema.

Explanation:

• Niacin (Vitamin B3): When taken in high doses, niacin can cause flushing, itching, and potentially more serious side effects like cystoid macular edema. It is important for individuals taking high doses of niacin to have regular eye examinations.
• Vitamin A: Although it is essential for normal vision, high doses of Vitamin A are not typically associated with macular edema but rather with liver damage and increased intracranial pressure.
• Vitamin D: Excessive amounts of Vitamin D can cause hypercalcemia, but it is not known to cause cystoid macular edema.
• Vitamin E: Known for its antioxidant properties and is generally considered safe, but high doses do not cause macular edema.

Thus, the correct answer is Niacin as it is the vitamin associated with causing cystoid macular edema at high doses.