Sirolimus

What is Sirolimus blood test?

Sirolimus (also called rapamycin) is an immunosuppressant drug used mainly to prevent organ transplant rejection by suppressing the immune response. Monitoring sirolimus levels in the blood is critical to ensure the medication is within the therapeutic range—effective but not toxic. Sirolimus blood test measures the concentration of sirolimus in a patient's whole blood sample collected using EDTA or heparin anticoagulant tubes.

Why consider Sirolimus blood test?

Sirolimus blood test can be considered for

• Therapeutic drug monitoring: Sirolimus has a narrow therapeutic window.
• Avoid toxicity: High levels can lead to side effects like infections, delayed wound healing, high cholesterol, and kidney damage.
• Ensure efficacy: Low levels may increase the risk of transplant rejection.
• Dose adjustment: Helps clinicians optimize dosing based on individual metabolism, drug interactions, and organ function.
• Monitor patient compliance: Confirms whether the patient is taking the medication as prescribed.

Who should get tested for Sirolimus blood test?

Sirolimus blood test can be recommended for

• Patients taking sirolimus after organ transplantation (kidney, liver, heart, etc.)
• Patients showing symptoms of side effects or suspected rejection
• Patients with potential drug interactions affecting sirolimus metabolism
• Those needing routine therapeutic monitoring as part of their treatment

More Information

OTHER NAMES: Sirolimus Blood Level, Sirolimus Therapeutic Drug Monitoring (TDM), Rapamycin Blood Level

Sirolimus, also known as rapamycin, is an immunosuppressive medication primarily used to prevent rejection in organ transplant patients. It also has anti-proliferative properties, which means it can inhibit cell growth and division.