What is an abatacept?

Abatacept is a biologic medication used to treat rheumatoid arthritis (RA) in adults. It may be used alone or with other medications. It is also used to treat juvenile idiopathic arthritis (JIA) in people aged 2 years and older. Abatacept is an immunosuppressive drug, which means that it works by reducing the activity of the immune system. This can help to reduce inflammation and swelling in the joints.

Abatacept is given as an injection under the skin (subcutaneous injection). It is usually given once a month. The dose is determined by the patient's weight and response to treatment.

Abatacept can cause a number of side effects, including:

* Upper respiratory tract infection

* Headache

* Nausea

* Vomiting

* Diarrhea

* Abdominal pain

* Constipation

* Rash

* Itching

* Injection site reactions

* Fatigue

* Dizziness

* Fever

* Chills

Abatacept can also cause serious side effects, including:

* Serious infections

* Liver damage

* Low blood counts

* Cancer

Before taking abatacept, tell your doctor about all of your medical conditions and allergies. Tell your doctor if you are pregnant or planning to become pregnant. It is not known if abatacept passes into breast milk. Do not breastfeed while taking abatacept.

Abatacept is expensive, and it may not be covered by insurance. If you have trouble affording abatacept, talk to your doctor about other options.