Pill Side Effects

Stop taking vitamin A and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives).
Other, less serious side effects may occur with large doses or prolonged use of vitamin A. Notify your doctor if you experience

tiredness;

nausea, vomiting, or decreased appetite;

irritability;

headache;

dryness or cracking of the lips or skin; or

hair loss.