Anti-Rejection Medications After Kidney Transplant: What to Know and How to Speak Up

The immune system protects the body by identifying what belongs and what doesn’t.  

“A transplanted kidney is considered non-self,” said Transplant Nurse Practitioner Nicole McCormick.  “Anti-rejection medications, also called immunosuppressants, help ‘hide’ the transplanted kidney from the immune system. They are essential to maintaining a transplant.”

These medications are carefully balanced. They must be strong enough to prevent rejection while still allowing the body to fight infections and other threats.

“Many kidney transplant recipients take more than one anti-rejection medication,” Nicole explained. “This lets us target different parts of the immune system, often using lower doses to reduce the risk of side effects.”

Learn more about anti-rejection medicines. 

A recent survey of more than 10,000 kidney transplant recipients across the U.S. and Canada found that 92% experienced side effects from their immunosuppressive (anti-rejection) medications. 

While most people said they trusted their transplant care teams, 

• One in four reported skipping doses because of side effects
• One in 10 skipped doses due to cost.

Missing or skipping anti-rejection medications puts a transplanted kidney at serious risk. That’s why it’s so important to learn about side effects and when to speak up about them. 

Your experience matters! Join the KidneyCARE™ Study to become a part of kidney research. 

All medications can cause side effects, but experiences vary widely. Some transplant recipients have few or none. Others may experience several. It depends on the drug type, dose, and individual response to the medication. 

Examples of Common Transplant Medicine Side Effects 

• Calcineurin inhibitors (like tacrolimus and cyclosporine) may cause neurological symptoms, including hand tremors, headaches, nerve pain in the hands or feet, and what many people describe as brain fog.

• Mycophenolate may lead to gastrointestinal symptoms such as nausea, vomiting, or diarrhea. Enteric-coated versions (like Myfortic) are sometimes easier on the stomach because they dissolve after passing through the stomach.

• All anti-rejection medications suppress the immune system, which increases the risk of infections and certain cancers. This is an expected but important tradeoff to protect the transplanted kidney.

Some people are also surprised to learn that generic and brand-name medications can feel different, even though they contain the same active ingredients and are considered therapeutically equivalent.

“Other components, like binders or fillers, can vary between manufacturers,” Nicole said. “That’s why we encourage patients to check their medication bottles and talk with their pharmacist or transplant team if something looks different or feels off.”

Watch videos made by recipients to learn what to expect after a transplant. 

Open communication with your transplant team is essential, especially in the months after transplant. Early on, providers and nurse coordinators often ask detailed questions during clinic visits or phone check-ins.

“We want to know how your appetite is,” Nicole said. “We ask specifically about nausea, vomiting, diarrhea, tremors, and other symptoms.”

These early conversations matter because side effects can be intense and may take time to manage.

For Anne Bena, a kidney transplant recipient, the first year to 18 months after transplant was the most challenging.

“I had a lot of side effects,” she said. “It took time to find the right medication and dosage for me.”

During that period, Anne experienced tremors and brain fog. But the gastrointestinal symptoms affected her quality of life the most.

“The nausea, vomiting, and diarrhea were overwhelming,” Anne said. “I was afraid to go anywhere because I worried about having an accident.”

Instead of suffering in silence, Anne spoke up. She talked with her doctor, transplant coordinator, and pharmacist.

“My pharmacist suggested switching to a name-brand medication,” Anne said. “It truly changed my life.”

Today, Anne has lived with her transplanted kidney for 26 years. She’s on a low dose of medication, experiences few side effects, and has had no rejection episodes.

Learn from and connect with another kidney transplant recipient. Sign up for NKF Peers. 

Paying for anti-rejection medications can be challenging, but missing doses puts your transplanted kidney at risk. 

The good news: Medicare covers immunosuppressant medications for all transplant recipients who qualify. There are also programs to help with copays, manufacturer discounts, and other financial assistance. Explore financial programs for kidney recipients. 

NKF Cares is also here to help you understand your coverage and connect with resources, so cost doesn’t get in the way of protecting your transplant. Call NKF Care’s toll-free number 855.653.2273 for help. 

As time goes on, transplant teams may ask fewer questions about side effects. That’s when self-advocacy becomes even more important.

“The goal of a kidney transplant isn’t just to extend life, it’s to improve quality of life,” Nicole said. “You shouldn’t feel worse than you did before your transplant. We have many tools to help manage side effects.”

If side effects are affecting your daily life, mental health, or ability to take medications as prescribed, it’s time to speak up. Because no one should feel like they have to live with side effects in silence.

Learn more about life with a kidney transplant.