Sirolimus 3mg Tablet contains sirolimus, an immunosuppressive medicine and mechanistic target of rapamycin (mTOR) inhibitor. Sirolimus is primarily used in specialist transplant medicine to reduce immune activity and help prevent organ rejection following renal transplantation. It is also approved for the treatment of lymphangioleiomyomatosis (LAM) in applicable markets.
Important strength note: Current U.S. sirolimus tablet labeling identifies 0.5mg, 1mg, and 2mg tablets as marketed tablet strengths. A 3mg tablet should therefore be verified against the specific manufacturer’s packaging, authorization, and market registration before being described as an authorized 3mg formulation or as “Generic Rapamune® 3mg.”
Sirolimus is primarily used as an immunosuppressive medicine in transplant care.
Approved uses of sirolimus tablets include:
Current U.S. labeling specifically indicates sirolimus for prevention of organ rejection in patients aged 13 years or older receiving renal transplants and for treatment of LAM.
Sirolimus is an mTOR inhibitor. It binds to FKBP-12 and inhibits mTORC1 signaling, a pathway involved in cellular growth and T-lymphocyte activation and proliferation.
By suppressing T-cell activity, sirolimus reduces the immune response that can contribute to rejection of a transplanted kidney.
After renal transplantation, the immune system can identify the transplanted organ as foreign. Immunosuppressive medicines such as sirolimus help reduce this immune response.
Sirolimus may be used as part of a broader immunosuppressive regimen involving other medicines. Treatment must be individualized by a transplant specialist, and blood concentrations are monitored in appropriate patients.
Current U.S. labeling emphasizes that sirolimus should be used by physicians experienced in immunosuppressive therapy and renal-transplant management.
Sirolimus is the generic active ingredient, while Rapamune® is a branded sirolimus product.
Therefore:
However, the currently identified U.S. tablet strengths are 0.5mg, 1mg, and 2mg. A 3mg tablet should not automatically be described as “Generic Rapamune® 3mg” without documentation confirming its regulatory status and equivalence.
Sirolimus produces substantial immunosuppression and should be used under specialist medical supervision.
Important risks include:
The current U.S. label also warns that sirolimus is not recommended for liver or lung transplant patients because safety and efficacy have not been established and serious transplant-specific complications have been reported.
Patients receiving sirolimus may require monitoring of:
Therapeutic drug monitoring is particularly important because sirolimus has clinically significant pharmacokinetic variability and numerous potential drug interactions.
Sirolimus has clinically important interactions with medicines and substances that affect metabolic and transporter pathways, particularly CYP3A4 and P-glycoprotein.
The current prescribing information also identifies cannabidiol as a potential interaction requiring consideration of therapeutic drug monitoring and dose adjustment. Patients should provide their transplant specialist or pharmacist with a complete list of prescription medicines, over-the-counter products, supplements, and herbal preparations.
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Because 3mg is not among the tablet strengths identified in current U.S. labeling, buyers and healthcare professionals should verify the manufacturer, strength, registration status, packaging, and country-specific authorization before purchasing a product marketed as Sirolimus 3mg Tablet.
Prescription medicines should only be obtained from appropriately regulated pharmacies or suppliers and used under qualified medical supervision.
What is Sirolimus 3mg Tablet?
Sirolimus 3mg Tablet is marketed as an oral tablet containing 3mg of sirolimus. However, the specific 3mg formulation should be verified because current U.S. labeling identifies 0.5mg, 1mg, and 2mg tablet strengths.
What is Sirolimus used for?
Sirolimus is primarily used to help prevent rejection following renal transplantation. It is also indicated for lymphangioleiomyomatosis in applicable markets.
Is Sirolimus the same as Rapamune®?
Rapamune® is a branded medicine containing sirolimus. Generic sirolimus products contain the same active ingredient when appropriately authorized, but a specific 3mg product should not be assumed to be a generic equivalent of Rapamune® without regulatory documentation.
Is Sirolimus a steroid?
No. Sirolimus is not a corticosteroid. It is an mTOR inhibitor immunosuppressant.
How does Sirolimus work?
Sirolimus inhibits mTORC1 signaling after binding to FKBP-12, reducing T-cell activation and proliferation and thereby suppressing immune activity.
Does Sirolimus require blood monitoring?
Yes. Therapeutic drug monitoring is an important component of sirolimus treatment in appropriate patients because blood concentrations can affect both effectiveness and toxicity.
Can Sirolimus interact with other medicines?
Yes. Sirolimus has numerous clinically significant drug interactions. A healthcare professional should review all medicines, supplements, and other substances before treatment.
Is Sirolimus 3mg an FDA-approved tablet strength?
Current U.S. labeling identifies sirolimus tablets in 0.5mg, 1mg, and 2mg strengths, not 3mg.
Can I buy Sirolimus 3mg online?
Availability depends on the specific manufacturer, country, prescription requirements, and regulatory authorization. The strength and product registration should be verified before purchase.
Is Sirolimus available internationally?
Sirolimus products are marketed in multiple countries, but approved strengths, formulations, indications, manufacturers, and prescription/import requirements vary by jurisdiction.
Last Updated: September 14, 2026 | Medically Reviewed By: Licensed Pharmacist
Medical Disclaimer: This information is provided for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Sirolimus is a prescription immunosuppressant requiring specialist supervision and therapeutic drug monitoring in appropriate patients. Always consult a qualified transplant specialist or healthcare professional before starting, stopping, or changing treatment.
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