Vascepa is a prescription medication used to treat high triglyceride levels in the blood. According to the sources provided, there are some potential side effects of taking Vascepa.
The first source  states that the most common side effects of Vascepa are joint pain, swelling, and stiffness. It also mentions that some people may experience back pain, muscle pain, and a skin rash. However, it notes that these side effects are usually mild and go away on their own.
The second source  confirms the potential for joint pain as a side effect of Vascepa. It also notes that some people may experience nausea, diarrhea, or stomach pain. However, it states that these side effects are not common and usually go away on their own.
The third source  provides more detailed information about the safety and side effects of Vascepa. It confirms the potential for joint pain, as well as back pain and muscle pain. It also notes that some people may experience an allergic reaction to Vascepa, which can cause hives, difficulty breathing, or swelling of the face, lips, tongue, or throat. The source advises people to seek medical attention immediately if they experience any of these symptoms.
Overall, while Vascepa may cause some side effects, they are usually mild and go away on their own. However, it is important to be aware of the potential for allergic reactions and to seek medical attention if any serious symptoms occur.