This medication is typically used for human immunodeficiency virus (HIV).

This medication is typically used twice a day. However, your doctor or pharmacist may have suggested a different schedule that is more appropriate for you. Important: Follow the instructions on the label. Do not use more of this product, or more often, than prescribed.

It must be used regularly and continuously to maintain its beneficial effects. Be sure to keep an adequate supply on hand. 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 be taken with or without food. To ensure effectiveness, avoid taking an antacid at the same time.

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

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 doctor or pharmacist. 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.

The use of this product is occasionally associated with changes in the distribution of body fat. You may notice a loss of fat in your face, arms, legs or hips, or you may notice an accumulation of fat in your abdomen, chest or neck area. These changes do not occur with everyone, and they are influenced by factors such as age, illness and the use of other antiviral medications. For more information, consult your doctor or pharmacist.

This medication may interact with other medications or supplements, sometimes significantly. Many interactions, however, may be dealt with by a dosage adjustment or a change in medication schedule. Check with your pharmacist before using this medication in combination with any other medications (including non-prescription products), vitamins or natural products.

A treatment with this medication requires regular monitoring by a doctor. Be sure to see your doctor for all regularly scheduled appointments.