Get emergency medical help if you have signs of an allergic reaction to Firmagon: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
fast or pounding heartbeats, fluttering in your chest;
shortness of breath;
sudden dizziness (like you might pass out); or
severe headache, blurred vision, pounding in your neck or ears.
Common Firmagon side effects may include:
hot flashes;
weight gain;
abnormal liver function tests; or
pain, swelling, redness, itching, or a hard lump where the medicine was injected.
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.
 Firmagon side effects (more detail)
