Take this product by mouth as directed. Follow all directions on the product package, or take as directed by your doctor. If you are uncertain about any of the information, consult your doctor or pharmacist. This medication should only be used as needed, not on a regular basis. Though very unlikely, this medication may be habit-forming. Do not increase your dose, take it more frequently than directed, or take it regularly for a long time. This medication may cause withdrawal reactions, especially if it has been used regularly for a long time or in high doses. In such cases, withdrawal symptoms (such as headaches, mental/mood changes such as irritation/nervousness) may occur if you suddenly stop using this medication. To prevent withdrawal reactions, your doctor may reduce your dose gradually. Consult your doctor or pharmacist for more details, and report any withdrawal reactions right away.