This medication is typically used twice a day. However, your pharmacist may have suggested a different schedule that is more appropriate for you. Generally, a treatment with this medication lasts several days. Take it for the entire time prescribed in order to achieve the medication's full benefit.

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 should not be taken with food. It is best taken on an empty stomach, one hour before or 2 hours after a meal.

To ensure effectiveness, avoid taking milk, dairy products, antacids or calcium supplements for at least 6 hours before and 2 hours after this medication. Also avoid mineral supplements (iron, magnesium or zinc). 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 headaches;
• it may cause abdominal discomfort;
• it may make your skin more sensitive to UV rays (e.g., sunlight, tanning lamps) - avoid exposure to UV rays as much as possible and protect yourself when out in the sun.

• it may cause dizziness - use caution when getting up from a lying or sitting position and use caution if driving;
• it may cause nausea or, rarely, 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.