Use

• Synvisc injections are used in the treatment of osteoarthritic knee pain. Synviscone.com reports that one Synvisc injection can provide knee pain relief for up to six months.
  
  

Administration

• The injection of Synvisc must be performed by a medical professional, as the medication is injected into the knee joint itself.
  
  

Side Effects

• Drugs.com reports that adverse effects from Synvisc injection include headache, upset stomach and possible swelling of the joint that receives the injection. Pain or swelling tends to be temporary.
  
  

Precautions

• Patients receiving Synvisc injections are advised to avoid strenuous activities for about two days after the injection, reports Synviscone.com. Jogging and weight training are specifically noted on Drugs.com as activities to avoid for the first two days after injection.
  
  

Bird Allergies

• Individuals with allergic responses to birds, feathers, eggs or other bird products should inform their physicians before receiving the Synvisc injection, because of the possibility of severe allergic reactions to Synvisc.