Get emergency medical help if you have any signs of an allergic reaction to Juvisync: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
In rare cases, Juvisync can cause a condition that results in the breakdown of skeletal muscle tissue, leading to kidney failure. Call your doctor right away if you have unexplained muscle pain, tenderness, or weakness especially if you also have fever, unusual tiredness, and dark colored urine.
Stop using Juvisync and call your doctor at once if you have:
confusion, memory problems;
swelling, weight gain, urinating less than usual or not at all;
severe pain in your upper stomach spreading to your back, nausea and vomiting, loss of appetite, fast heart rate;
increased thirst, increased urination, hunger, dry mouth, fruity breath odor, drowsiness, dry skin, blurred vision, weight loss;
itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); or
severe skin reaction - fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.
Common Juvisync side effects may include:
cold symptoms such as stuffy nose, sneezing, sore throat;
headache; or
nausea, stomach pain.
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.
 Juvisync side effects (more detail)
