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How do I take vitamin A?


Vitamin A is available in forms such as capsules, tablets, liquid, and solution. Do not take more of this product than directed because too much can cause severe toxicity and be life-threatening. If you miss a dose, skip the dose, and return to your regular schedule, without double dosing. If you are taking the oral liquid form of vitamin A, you can drop it directly into the mouth or mix it with cereal, juice, or other food. Injections should always be done by a licensed health care professional.

How much vitamin A should I take a day?

The best way to take vitamin A depends on the reason it is being used. The amount you take relates to the strength of the product you are using. The number of doses taken daily, the time between doses, and how long you take vitamin A relate to the medical issue for which you are taking it. Also, you should be aware that many vitamin supplement products have not been exhaustively tested, their effectiveness and safety might not be proven, and product brands may differ and have various ingredients. Become informed about the contents of the product you choose, and use it as directed on its label or package, or as stipulated by your healthcare professional.

Should I let my doctor know I take vitamin A?

Always talk to your doctor before taking any new supplement or medication to avoid possible interactions with other medicines you may take or existing health issues you may have. If you take vitamin A, you must be careful not to take too much. Vitamin A is stored in the body and can reach dangerously toxic levels. For example, taking vitamin A along with a retinoid medication, such as Soriatane® (acitretin); Atralin®, Avita®, Renova®, Retin-A®, Tretin-X® (tretinoin) or Accutane®, Amnesteem®, Claravis®, Sotret® (isotretinoin) can significantly increase your risk for poisoning. Be sure to consult your doctor before taking vitamin A.

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Back to Ask a Pharmacist


Answers to questions regarding information about medications or health conditions are not for diagnostic or treatment purposes and are not conclusive as to the presence or absence of any health condition. Consult your physician for diagnosis and treatment of your medical condition. The information provided is not a substitute for medical advice. Advances in medicine may cause this information to become outdated, invalid or subject to debate. Professional opinions and interpretations of the scientific literature may vary. Walgreens' terms of use and general warranty disclaimer apply to all services provided. If you are in need of immediate medical attention, contact your physician, poison control center or emergency medical professional. If you need to speak with a pharmacist for non-emergency matters, contact your local Walgreens pharmacist or call a pharmacist toll-free at 1 (877) 250-5823.

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