Vascepa is a prescription medication that contains the active ingredient icosapent ethyl. It is used to lower triglyceride levels in adults with severe hypertriglyceridemia [1]. Vascepa is not indicated for the prevention of allergies.

According to the FDA label for Vascepa, the medication is contraindicated in patients with a known hypersensitivity (e.g., anaphylactic reaction) to Vascepa or any of its components [2]. This means that if a person is allergic to any of the ingredients in Vascepa, they should not take the medication.

The Drug Patent Watch website provides information on patents related to Vascepa, but does not provide any information on its effectiveness for allergy prevention [3].

In conclusion, Vascepa is not effective for allergy prevention. It is a medication used to lower triglyceride levels in adults with severe hypertriglyceridemia, and should not be taken by individuals who are allergic to any of its components [1][2].

Sources:
[1] https://www.vascepa.com/
[2] https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/202057s035lbl.pdf
[3] https://www.drugpatentwatch.com/p/tradename/VASCEPA