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Tacrolimus

Tacrolimus is a calcineurin inhibitor that suppresses the immune system by preventing the activation of T-cells. It is prescribed to individuals who have undergone organ transplants and require ongoing immunosuppression to prevent organ rejection.

  • Recommended Usage
Indications:

Prevention of Organ Rejection:

  • Kidney Transplantation: To prevent organ rejection after a kidney transplant.
  • Liver Transplantation: To prevent organ rejection following liver transplants.
  • Heart Transplantation: Used to prevent heart transplant rejection.

Autoimmune Conditions:

  • In certain cases, oral tacrolimus may be used to treat autoimmune conditions such as rheumatoid arthritis, psoriasis, or lupus.
Dosage and Administration:
  • Starting Dose: The starting dose of tacrolimus capsules typically ranges from 0.1 to 0.15 mg/kg/day, divided into two doses (morning and evening), depending on the type of transplant and the individual patient's condition.
  • Target Blood Concentration: The dose is adjusted to maintain blood levels between 5–15 ng/mL, depending on the type of transplant and response to therapy.
Precautions:
  • Infections: Tacrolimus suppresses the immune system, making patients more susceptible to bacterial, viral, and fungal infections. Proper infection prevention strategies should be followed, and patients should be closely monitored for signs of infection.
  • Kidney Function: Tacrolimus can cause nephrotoxicity (kidney damage). Kidney function should be monitored regularly through blood tests, especially in the early stages of treatment.
  • Electrolyte Imbalances: Tacrolimus may cause electrolyte disturbances, such as low potassium, low magnesium, and high blood sugar. Regular blood tests are required to check electrolyte levels.
  • Liver Function: Tacrolimus can impact liver function, and liver enzymes should be monitored during treatment.
  • Drug Interactions: Tacrolimus has significant drug interactions. Medications such as antifungals, antibiotics, and anti-seizure drugs can increase or decrease tacrolimus levels. Inform your healthcare provider about all medications you are taking.
  • Pregnancy and Lactation: Tacrolimus is not recommended during pregnancy unless the benefit outweighs the risk. It is also excreted in breast milk, so it should be used with caution in breastfeeding mothers.
Benefits:
  • Prevention of Organ Rejection: Tacrolimus is highly effective in preventing organ rejection, improving the outcomes of kidney, liver, and heart transplants.
  • Better Graft Survival: By suppressing the immune system, tacrolimus helps improve graft survival and functionality.
  • Topical Uses: Tacrolimus can also be used topically for skin conditions like eczema (when oral forms are not required).
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