What can I take for erectile dysfunction?

Some evidence suggests high doses of L-arginine improve erectile dysfunction by helping blood vessels to open wider, which improves blood flow to the penis. Side effects are generally considered mild but may include cramps, diarrhea, and nausea. L-arginine should not be taken with Viagra, a prescription drug that treats ED. Some studies show that propionyl-L-carnitine, when combined with Viagra, could improve erectile function better than when taking Viagra alone. Propionyl-L-carnitine is generally considered safe when used under supervision of a doctor.

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