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Glam Fame Journal

How long do knee injections last?

Author

Sophia Carter

Updated on March 21, 2026

How long do knee injections last?

For some patients, knee gel injections may help delay or avoid the need for knee replacement surgery. The effects of knee gel injections may last for about six months, with noticeable results typically occurring 4 or 5 weeks after treatment.

What is the best injection for knees?

Corticosteroid injections are among the most common knee injections. Doctors inject corticosteroids directly into the knee joint to help relieve knee pain and inflammation quickly. They are a class of medications related to the steroid cortisone. They are routinely used to reduce inflammation.

What are the side effects of knee injections?

Side effects can include: Cortisone flare reaction: Discomfort at the injection site may cause an increase in pain 24-48 hours after the injection. Icing the injection site may help with this temporary flare of pain.

Which knee injection lasts longest?

PRP takes longer for its action on the joints to begin, around six months, but the results are more superior and last longer than hyaluronic acid. Infliximab may take a few days up to two to six weeks for the effects to begin after the first treatment. The treatment can be repeated every eight weeks.

Will Synvisc help bone on bone?

Synvisc and related preparations are probably less effective once the cartilage is gone and there is bone on bone. Joint replacement at that point is probably the only solution.

How often will Medicare pay for knee injections?

Medicare will cover knee injections once every six months if they are medically necessary. The injections are covered under Medicare Part B and subject to the annual Part B deductible. X-rays are required prior to Medicare approval. As mentioned above, there are many different injection treatments for the knees.

How many times can you get Synvisc injections?

Can I receive Synvisc-One treatment more than once? Yes, Synvisc-One can be repeated safely. In a medical study involving 160 patients, 77 received a second injection of Synvisc-One. When your osteoarthritis knee pain returns, talk to your doctor to see if Synvisc-One is right for you.

Which is better Synvisc or cortisone?

Redd, MD from the William Beaumont Army Medical Center in El Paso, Texas, which concluded that Synvisc and Corticosteroid injections were found to be equally effective for knee osteoarthritis.