Drug Interaction Report

Peginterferon alfa-2a may increase the blood levels of OLANZapine in some patients. This may increase side effects such as dizziness; drowsiness; dry mouth; constipation; increased appetite; weight gain; increased blood sugar and cholesterol or triglyceride levels; cognitive and motor impairment; involuntary muscle movements involving the face, tongue, or other parts of the body; difficulty swallowing; low blood pressure (especially at the start of treatment or after a dose increase); blood pressure increases; priapism (prolonged and painful erection unrelated to sexual activity); irregular heart rhythm; and seizures. Let your doctor know if your condition changes or you experience increased side effects. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Alcohol can increase the nervous system side effects of OLANZapine such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with OLANZapine. Do not use more than the recommended dose of OLANZapine, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.