There are no significant common side effects from taking Prevagen, according to the Prevagen website. The company also adds that anyone on several different medications should consult his or her personal physician.
Although as of January 2015 there are no officially recognized side effects, the U.S. Food and Drug Administration sent a warning letter in October 2012 to the manufacturer, Quincy Bioscience, stating that the company failed to report over 1,000 instances of product-associated side effects, as stated on the FDA website. The instances reported included seizures, strokes, chest pains, tremors, fainting and exacerbated multiple sclerosis.
Prevagen is labeled as a dietary supplement, states Janet, Jenner and Suggs, a law firm. It's marketed as a brain vitamin that can improve cognitive ability and short-term memory. The manufacturer states the primary ingredient is a well-known protein called apoaequorin, which is originally found in jellyfish.
According to the FDA's letter, Quincy Bioscience uses a synthetic form of apoaequorin, which does not meet the definition of a vitamin or dietary supplement but that of a drug. In addition, the manufacturer's advertising also alludes that the product is intended for use in the cure, mitigation, treatment or prevention of disease, which would make it a drug.