Vitamin A

Vitamin A is one of the vitamins that functions for the development and performance of various body organs, such as the eyes, skin, reproductive organs, and the immune system. Vitamin A can be found in various foods, such as beef liver, milk, cheese, yogurt, eggs, mangoes, spinach and carrots, and fish oil.


Vitamin A


How to Take Vitamin A Correctly

Make sure you always take vitamin A supplements according to the information on the packaging or doctor's recommendations. Swallow whole if taking vitamin A in tablet or capsule form. For vitamin A supplements in liquid form, we recommend using the spoon or measuring cup included in the package. Do not use a regular tablespoon because the dose may be different.


For patients who forget to take vitamin A supplements, it is advisable to do so immediately if the break with the next consumption schedule is not too close. If it is close, do not double the dose. Store at room temperature and away from heat and humidity, and avoid direct sunlight.


Interaction of Vitamin A with Other Drugs

There are a number of drugs that have the potential to cause interactions if taken together with vitamin A. Some interactions that can arise include:

  • Decreases absorption of vitamin A from food, when used with orlistat.
  • Causes bleeding, if used with warfarin drugs.
  • Increased risk of developing serious conditions due to increased pressure in the brain, when used with doxycycline, minocycline, oxytetracycline, and tetracycline.
  • Increases risk of liver disorders, if used with simvastatin.
  • Causes excessive levels of vitamin A in the blood, if used together with retinoids, tretinoin, and isotretinoin.
  • Decreases the effectiveness of vitamin A, when used with cholestyramine, sevelamer, and colestipol.


Side Effects and Dangers of Vitamin A

If consumed in appropriate doses, vitamin A will not harm. However, if taken in high doses or in the long term, excess vitamin A can cause the following side effects:

  • Diarrhea.
  • Loss of appetite.
  • Stomach ache.
  • Gag.
  • Dry or cracked skin and lips.
  • Drowsiness and fatigue.
  • Weak.
  • Irritable.
  • Hair loss.
  • Headache.
  • Fever.
  • Increased frequency of urination, especially at night.
  • Blurred vision.

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