The FDAwas concerned over the drug's skin rash side effects.

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It is looking at a health problem and deciding that their prescription is the only drug that will clear up the rash, when locally sourced medicines may work just as well, if not better.

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GeneSoft used Glaxo data and doctor testimony to convince the FDA that the skin rash was manageable and worth the risk for a drug that can attack pneumonia.

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The main side effects of the drug generally aren't severe primarily fatigue, rash and high cholesterol and triglycerides but the cumulative effects of chronic use in Alzheimer's patients are unknown, said Dr. Flaherty.

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