Some side effects can include:
nausea, vomiting, upset stomach, bloating, dry mouth, constipation, loss of appetite, dizziness, drowsiness, tired feeling, increased sweating, headache, hot flashes (flushing), swelling in your hands or feet, sleep problems (insomnia), weight changes, decreased sex drive, impotence, difficulty having an orgasm
More serious effects can also include:
fast or pounding heartbeat, painful or difficult urination, seizures, yellowing eyes or skin, dark urine, severe stomach or abdominal pain, black or bloody stools, vomit that looks like coffee grounds, easy bruising or bleeding
Speak with your doctor or pharmacist for help managing any side effects that become too severe during your treatment with Savella. If you experience any serious side effects contact your doctor for additional medical treatment.