If you will be taking this medicine for a long time, it is very important that your doctor check you at regular visits for signs of your receiving too much medicine.
If your symptoms do not improve within a few days or if they become worse, check with your doctor.
Do not take other medicines unless they have been discussed with your doctor. This especially includes nonprescription medicines, such as aspirin, and medicines for appetite control, asthma, colds, cough, hay fever, or sinus problems.
This medicine may cause some people to become drowsy, dizzy, or less alert than they are normally. This medicine may also cause a change in vision that could cause you to see less well at night. Make sure you know how you react to this medicine before you drive, use machines, or do anything else that could be dangerous if you are unable to see well, or if you are dizzy or are not alert.