Tacrolimus

How hard is it to find Tacrolimus in stock?

Tacrolimus has a findability score of 35 out of 100, meaning it can be moderately difficult to locate in stock at your local pharmacy. While Tacrolimus is not currently listed on the FDA's active drug shortage list, intermittent supply disruptions have been reported at individual pharmacies — particularly for specific generic manufacturers or certain strengths and formulations. The IV formulation has historically been more prone to shortages than oral forms. If your pharmacy is out of stock, try calling other nearby pharmacies or use Medfinder to search availability in your area.

Who Can Prescribe Tacrolimus?

Tacrolimus is primarily prescribed by specialists experienced in immunosuppressive therapy and organ transplant management, including:

• Transplant Surgeons
• Transplant Nephrologists (kidney transplant)
• Transplant Hepatologists (liver transplant)
• Transplant Cardiologists (heart transplant)
• Dermatologists (for the topical ointment Protopic)
• Rheumatologists (off-label uses)
• Gastroenterologists (off-label for Crohn's disease or ulcerative colitis)

Due to its serious side-effect profile and the need for therapeutic drug monitoring, Tacrolimus should only be prescribed by physicians experienced in managing transplant patients or immunosuppressive therapy.

Is Tacrolimus a controlled substance?

No, Tacrolimus is not a controlled substance. It does not have a DEA schedule and is not considered to have potential for abuse or dependence. However, it is a prescription-only medication that requires regular blood level monitoring and careful dose adjustments, so it cannot be obtained over the counter.

Common Side Effects of Tacrolimus

Tacrolimus can cause a range of side effects. The most commonly reported include:

• Tremors — shaking of the hands, which is dose-related
• Headache
• Diarrhea
• Nausea and abdominal pain
• High blood pressure (hypertension)
• Kidney function changes (elevated creatinine)
• High blood sugar — new-onset diabetes after transplant (NODAT)
• High potassium levels (hyperkalemia)
• Low magnesium levels (hypomagnesemia)
• Insomnia
• Hair loss

Serious side effects include nephrotoxicity (kidney damage), neurotoxicity, increased risk of infections (BK virus, CMV), and an increased risk of lymphoma and skin cancers. Tacrolimus carries an FDA boxed warning about these risks. Report any unusual symptoms to your transplant team immediately.

Final Thoughts on Tacrolimus

Tacrolimus is a cornerstone immunosuppressant medication that has dramatically improved outcomes for organ transplant recipients since its introduction. While it carries significant risks — including kidney damage, increased infection susceptibility, and cancer risk — it remains one of the most effective anti-rejection drugs available.

If you're having trouble finding Tacrolimus in stock at your pharmacy, Medfinder can help you locate it nearby. With a findability score of 35, some patients do experience difficulty finding specific strengths or formulations. Generic immediate-release Tacrolimus is the most widely available version, starting around $30–$65 with discount coupons. Brand-name formulations like Prograf, Astagraf XL, and Envarsus XR are more expensive but may be covered with insurance or manufacturer copay assistance programs.

Never miss a dose or switch formulations without your transplant team's approval — even small changes in Tacrolimus blood levels can lead to organ rejection or toxicity.