If you are taking the over-the-counter product, read all directions on the product package before taking this medication. Take this medication by mouth, usually once daily or as directed by your doctor.

This medication is best taken on an empty stomach 1 hour before or 2 hours after meals. If stomach upset occurs, you may take this medication with food. Avoid taking antacids, dairy products, tea, or coffee within 2 hours before or after this medication because they will decrease its effectiveness.

Take with a full glass of water (8 ounces or 240 milliliters) unless your doctor directs you otherwise. Do not lie down for at least 10 minutes after taking this medication.

If you are using the liquid form of this medication, carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. To prevent staining the teeth, you may mix the dose in a glass of water or juice, and drink it through a straw. If your liquid form is to be given by dropper, the dose may be placed well back on the tongue and followed with water or juice. If your liquid form is a suspension, shake the bottle well before each dose.

If you are taking extended-release capsules, swallow the capsules whole. Do not crush or chew the capsules. Doing so can release all of the drug at once, increasing the risk of side effects.

Use this medication regularly in order to get the most benefit from it. To help you remember, take it at the same time each day.