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Updated: Aug 19, 2026

Trans-vivo Delayed Type Hypersensitivity Assay for Antigen Specific Regulation
Published on: May 2, 2013
Important interactions of drugs with immunosuppressive agents used in transplant recipients
1Division of Cardiothoracic Transplantation and Research, Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minnesota 55407, USA.
Abstract:
Solid organ transplant recipients depend on multiple immunosuppressive drugs, given in combination, to prevent rejection of their allografts. These patients often require many other therapeutic agents to treat underlying illnesses or concurrent diseases. Whenever a new medication is administered to a transplant patient, the potential exists for increasing or decreasing the tissue concentrations of immunosuppressive agents. This can lead to serious complications, such as over-immunosuppression and infection, under-immunosuppression and acute rejection, or additive toxicities, including nephrotoxicity. New immunosuppressants are under development and in clinical use, such as FK506, deoxyspergualin, OG 37-325, rapamycin, brequinar, and mycophenolate mofetil, thereby creating the possibility of many new drug-drug interactions.
Insights
Solid organ transplant recipients require careful management of immunosuppressive drugs. Introducing new medications can alter drug levels, risking serious complications like infection or organ rejection due to drug-drug interactions.
Area of Science:
- Pharmacology
- Transplantation Medicine
- Clinical Pharmacy
Background:
- Solid organ transplant recipients rely on multiple immunosuppressants to prevent graft rejection.
- These patients frequently use additional medications for comorbidities, increasing interaction risks.
Purpose of the Study:
- To highlight the potential for drug-drug interactions in transplant recipients.
- To discuss the clinical implications of altered immunosuppressant levels.
Main Methods:
- Review of existing literature on drug interactions in transplant patients.
- Analysis of potential interactions with new and existing immunosuppressive agents.
Main Results:
- Concomitant medications can alter immunosuppressive drug concentrations.
- Interactions may lead to over-immunosuppression (infection) or under-immunosuppression (rejection).
- Additive toxicities, such as nephrotoxicity, are also a concern.
Conclusions:
- Close monitoring of transplant patients is crucial when new drugs are introduced.
- Understanding drug-drug interactions is vital for optimizing immunosuppression and preventing adverse events.
- Emerging immunosuppressants present new challenges for managing drug interactions.
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