Get emergency medical help if you have signs of an allergic reaction to Ongentys: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
a light-headed feeling, like you might pass out;
confusion, hallucinations (hearing or seeing something that is not there);
aggression, agitation, unusual thoughts or behavior;
uncontrolled muscle movements in your face (chewing, lip smacking, frowning, tongue movement, blinking or eye movement); or
worsening tremors, stiffness, or muscle spasms.
You may have increased sexual urges, unusual urges to gamble, or other intense urges while taking this medicine. Talk with your doctor if this occurs.
Common Ongentys side effects may include:
feeling light-headed;
uncontrolled muscle movement;
abnormal blood tests;
constipation; or
weight loss.
When you stop taking Ongentys, watch for withdrawal symptoms such as: stiff muscles, high fever, sweating, confusion, fast or uneven heartbeats, tremors, or feeling like you might pass out.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Ongentys side effects (more detail)
