Synvisc One is a knee injection used as part of viscosupplementation. In simpler terms, it is meant to add more cushioning and lubrication inside the knee joint when the natural joint fluid is no longer doing that job well.
A healthy knee has fluid inside it that helps the joint move smoothly and absorb some of the pressure from walking, standing, and other daily movements. With osteoarthritis, that fluid can become less effective. Synvisc One improves how the joint moves by helping it glide more easily and better handle stress.
It does not rebuild the joint or “fix” worn cartilage. Instead, it works by improving the inside of the knee so movement may feel more comfortable.
Synvisc-One is made with a gel-like material called hylan G-F 20. This is a form of hyaluronan, a substance that healthy joints naturally use for cushioning and smooth movement.
It also includes a medical-grade liquid solution that helps hold everything together and keeps the Synvisc One injection stable. That solution contains salt, phosphate ingredients, and sterile water. These parts are not the main “active” part of the treatment. But they help create the right fluid environment for the gel component.
Synvisc-One is usually recommended for people with knee osteoarthritis who are still dealing with pain after trying more basic options first. That may include exercise, weight management, changes in activity, and over-the-counter pain medicine.
It’s often considered when knee pain is still limiting daily life even after more conservative care hasn’t helped enough. The goal is to give the knee more support inside the joint when simple measures are no longer doing the job.
After a Synvisc One injection, most people go home the same day. It’s usually a good idea to take it easy for about 48 hours and avoid heavy activity, high-impact exercise, or long periods of heavy weight-bearing. That means no jogging, tennis, or similar activities right away.
Knee pain relief does not happen the same way for everyone. Sometimes they happen pretty quickly, within a day or two, but sometimes it may take a week or more. If your knee pain returns later after the Synvisc-One injection, we can reevaluate and discuss the next step.
Most Synvisc One injection side effects are described as mild and temporary, but patients should report anything unusual to their doctor:
At Painless Medical Practice in Chicago, IL, we make Synvisc-One treatment simple and personal. Before administering the injection, we make sure it is actually appropriate for your knee and your situation. Our clinic is led by Jaroslav Tymouch, MD, Founder of Painless Medical Practice, so an experienced physician supervises your care.
We don’t use generic approaches. We review your case and consider if this option is a good match for you. We also respect your time and focus on care that is clear, practical, and medically appropriate, with as few sessions as reasonably possible.
If you’re looking for trusted pain management in Chicago, IL, schedule an appointment with our team to find out whether Synvisc-One is the right choice for managing your knee pain.









Synvisc-One is a knee injection used to add cushioning and lubrication inside the joint. It helps improve movement and reduce discomfort in people with osteoarthritis.
Synvisc One injection works by improving the quality of joint fluid, helping the knee move more smoothly and absorb pressure better during daily activities.
Common side effects include temporary pain, swelling, warmth, redness, or fluid buildup in the knee. In rare cases, allergic reactions may occur.
Relief may begin within a few days, but for some people it can take a week or more to notice improvement.
Synvisc-One is made of hylan G-F 20, a gel-like form of hyaluronan, along with a sterile solution that includes water, salts, and phosphate compounds to support the injection.
