If you have epilepsy, a change in the pattern of your seizures may be caused by a change in the way your antiseizure medicine affects your body. This may occur because of:

• Lack of sleep.
• Stress.
• Alcohol or drug use or abuse.
• Other medicines (especially some antibiotics and birth control pills).
• Pregnancy.
• Other illness.

See your doctor if your seizures are occurring more often or are more severe. Your doctor will want to check the dose of your antiseizure medicine. However, even if you are already taking the right dose and right kind of medicine, you still may have changes in the pattern of your seizures because of an illness, a change in environment, or a change in your disease.