Also, use clothing or a sunscreen to protect skin that's not covered even if you plan to stay in the shade. You may have the urge to urinate but may not be able to empty your bladder completely. You may be able to void only small amounts of urine at a time, so you may have urges to urinate more often than usual. If you have difficulty urinating, call your doctor as soon as possible. Some people may gain weight after several weeks or months of treatment.
Some medicines can cause an increase in appetite.
If you start to gain weight, ask your doctor to recommend a balanced, low-calorie diet that will provide good nutrition. Also, exercise regularly to prevent yourself from gaining weight. Be sure to talk to your doctor before beginning an exercise program. For more information, see Healthy Living . The side effects discussed in this section can be serious but occur at different rates with various medicines and in different people.