Use exactly as directed on the label, or as prescribed by your doctor.
Vitamin A oral is taken by mouth.
Vitamin A injection is injected into a muscle. A healthcare provider will give you this injection if you are unable to take the medicine by mouth, and can teach you how to properly use the medication by yourself.
Read and carefully follow any Instructions for Use provided with your medicine. Ask your doctor or pharmacist if you don't understand all instructions. Prepare an injection only when you are ready to give it.
The recommended dietary allowance of vitamin A increases with age. Follow your healthcare provider's instructions. You may also consult the Office of Dietary Supplements of the National Institutes of Health, or the U.S. Department of Agriculture (USDA) Nutrient Database (formerly "Recommended Daily Allowances") listings for more information.
A child's dose of vitamin A is based on the age of the child. Ask a doctor or pharmacist if you have questions about giving vitamin A to a child.
Swallow a vitamin A capsule whole and do not crush, chew, break, or open it.
Eating fatty foods can help your body absorb vitamin A.
Never use more than the recommended dose of vitamin A. Avoid taking more than one vitamin product at the same time unless your doctor tells you to. Taking similar vitamin products together can result in a vitamin overdose or serious side effects.
The total daily amount of vitamin A you receive includes vitamin A in the foods you eat combined with taking vitamin A as a supplement.
Store at room temperature away from moisture, heat, and light.
 Detailed Vitamin a dosage information
Free Drugs.com Discount Card
Save up to 80% on your prescriptions.
Accepted at over 65,000 pharmacies.
Get Discount Card
What happens if I miss a dose?
Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.
Call your doctor for instructions if you miss a vitamin A injection.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose of vitamin A can cause serious or life-threatening side effects.
Overdose symptoms may include dizziness, drowsiness, lack of energy, feeling irritable, vision changes, severe headache or pain behind your eyes, upper stomach pain, vomiting, dark urine, or yellowing of the skin or eyes.
What should while taking vitamin A?
Avoid drinking alcohol. It may increase your risk of liver damage while taking vitamin A.
Avoid taking more than one vitamin product at the same time unless your doctor tells you to.
Avoid taking orlistat (alli, Xenical) or mineral oil while you are taking vitamin A.
