This medication is typically used only once a day. However, your pharmacist may have suggested a different schedule that is more appropriate for you. It must be used regularly and continuously to maintain its beneficial effects. Be sure to keep an adequate supply on hand.

Avoid taking high doses of vitamin C. If you forget a dose, take it as soon as you remember -- unless it is almost time for your next dose. In that case, skip the missed dose. Do not double the next dose to catch up.

This medication may irritate the stomach, and should be taken with food. It is best to avoid coffee, spicy food or alcohol. It is recommended to drink plenty of water while using this medication.

In addition to its desired action, this medication may cause some side effects, notably:

• it may cause spots or redness of the skin;
• it may lower your white blood cell count, which can lead to unusual tiredness, fever, chills, sore throat or infections -- if you experience any of these symptoms, contact your doctor right away;

• it may cause a metallic aftertaste;
• it may cause nausea and vomiting.

Each person may react differently to a treatment. If you think this medication may be causing side effects (including those described here, or others), talk to your health care professional. He or she can help you to determine whether or not the medication is the source of the problem.

As with most medications, this product should be stored at room temperature. Store it in a secure location where it will not be exposed to excessive heat, moisture or direct sunlight. Make sure that any leftover portion is disposed of safely.