Repatha injection side effects include muscle pain, diarrhea, and cold symptoms, with rare cases of serious allergic reactions. This medication, part of a class called PCSK9 inhibitors, lowers cholesterol levels by blocking a protein that reduces LDL ("bad" cholesterol) removal.
Repatha (evolocumab) binds to PCSK9 proteins, preventing them receptors. This allows more LDL receptors to remain on liver cells, increasing their ability to remove LDL cholesterol from the bloodstream. The FDA approved Repatha in 2015 for adults with primary hyperlipidemia or heterozygous familial hypercholesterolemia.
The most common side effects reported in clinical trials were:
Serious side effects are rare but may include allergic reactions like rash, itching, or difficulty breathing. In clinical trials, less than 1% of patients experienced serious side effects.
Patients with a history of allergic reactions to medications may be more likely to experience allergic reactions to Repatha. Those with pre-existing muscle conditions may also be more susceptible to muscle pain. In a study published in the New England Journal of Medicine, researchers found that patients taking Repatha along with statins had a lower risk of cardiovascular events compared to those taking statins alone.
Some people confuse Repatha with statins, another type of cholesterol-lowering medication. While both are used to lower cholesterol, they work differently and have different side effect profiles. Unlike statins, Repatha is not associated with increased risk of liver damage or memory problems.
Another misconception is that Repatha causes significant weight gain. Clinical trials have not shown a significant association between Repatha and weight changes. In fact, a study published in the Journal of the American College of Cardiology found that patients taking Repatha did not experience significant weight changes compared to those taking a placebo.
Consider a 55-year-old patient with a history of high cholesterol who starts taking Repatha injections. After the first few doses, they experience mild muscle pain and diarrhea. These side effects are mild and manageable, similar to the experiences of many other patients in clinical trials. The patient continues taking Repatha and experiences a significant reduction in LDL cholesterol levels, leading to improved cardiovascular health.