What are the health risks associated with Zyprexa?

Zyprexa and other antipsychotic medications can cause serious problems such as:

A life-threatening nervous system problem called neuroleptic malignant syndrome (NMS). NMS can cause a high fever, stiff muscles, sweating, a fast or irregular heart beat, change in blood pressure, and confusion. NMS can affect your kidneys. NMS is a medical emergency. Call your healthcare professional right away if you experience these symptoms.
A movement problem called tardive dyskinesia (TD). Call your healthcare professional right away if you get muscle movements that cannot be stopped.
High blood sugar and diabetes. Patients with diabetes or who have a higher chance for diabetes should have their blood sugar checked often.
Strokes have happened in older patients treated for mental illness from dementia. Zyprexa is not approved for this use.
Other serious side effects include low blood pressure seen as dizziness, and possibly fainting; increased heart beat; seizures; liver problems; increased body temperature; and difficulty swallowing.
The most common side effects include sleepiness, dry mouth, dizziness, restlessness, constipation, upset stomach, weight gain, increased appetite, and tremor.