abatacept vs methotrexate
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of abatacept and methotrexate. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Orencia
Trexall, Otrexup
Orencia is a medicine that helps to reduce inflammation. It is used to treat rheumatoid arthritis, juvenile idiopathic arthritis, and psoriatic arthritis.
Methotrexate is a drug that can treat certain cancers, rheumatoid arthritis, psoriasis, and other conditions. It works by slowing the growth of cells in the body.
Orencia treats rheumatoid arthritis in adults. It also treats polyarticular juvenile idiopathic arthritis in patients 2 years and older. Orencia can also treat active psoriatic arthritis in patients 2 years and older. Finally, it can prevent acute graft versus host disease after a stem cell transplant.
Methotrexate can treat acute lymphoblastic leukemia, a type of cancer, in adults and children. It also treats mycosis fungoides, a skin lymphoma, in adults. Additionally, it treats relapsed or refractory non-Hodgkin lymphoma in adults. For non-cancer conditions, it treats rheumatoid arthritis in adults, polyarticular juvenile idiopathic arthritis (pJIA) in children, and severe psoriasis in adults.
Orencia works by blocking the activity of certain immune cells called T cells. These T cells can cause inflammation and damage to your joints and other tissues. By blocking T cell activity, Orencia can help reduce inflammation and relieve your symptoms.
Methotrexate blocks an enzyme called dihydrofolate reductase. This enzyme is needed for cells to grow and multiply. By blocking this enzyme, methotrexate slows down the growth of cells, especially cancer cells and cells that cause inflammation in arthritis and psoriasis.
- • Headache
- • Upper respiratory tract infection (like a cold)
- • Runny nose
- • Nausea
- • Mouth sores
- • Nausea
- • Abdominal pain
- • Changes in liver tests
- Rheumatoid Arthritis 23,596
- Pain 21,295
- Arthralgia 20,151
- Joint Swelling 19,709
- Fatigue 14,200
- Rheumatoid Arthritis 38,053
- Arthralgia 36,283
- Pain 35,413
- Fatigue 29,061
- Nausea 24,009
Using Orencia with a TNF antagonist or other biologic medicines can raise your risk of serious infections. Tell your doctor if you have any signs of infection, such as fever, cough, or sore throat. Orencia can also cause allergic reactions, including anaphylaxis. Get medical help right away if you have trouble breathing, swelling, or hives.
Methotrexate can cause serious harm to an unborn baby, including death. If you are pregnant, you should not take this medicine for non-cancer conditions. If you are taking it for cancer, talk to your doctor about the risks. This medicine can also cause severe allergic reactions and other serious side effects that can be life-threatening. Contact your doctor immediately if you experience any signs of infection, lung problems, or kidney problems.
There is not enough information about Orencia use in pregnant women to know if it is safe. Talk to your doctor if you are pregnant, plan to become pregnant, or are breastfeeding.
Methotrexate can cause birth defects or fetal death if taken during pregnancy for non-cancer conditions. If you are pregnant or plan to become pregnant, talk to your doctor. Do not breastfeed while taking methotrexate, as it can pass into breast milk and harm your baby.
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How to Read This abatacept vs methotrexate Comparison
abatacept is classified in the T-Cell Co-Stimulation Modulator drug class, while methotrexate sits within the Disease-Modifying Antirheumatic Drug (DMARD) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, abatacept has 98,951 submissions while methotrexate has 162,819. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for abatacept or methotrexate.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.