After googling the effects of nitric oxide it seems that one of the side effects is cough. Something to do with the cough trigger circuitry in the body with higher levels of nitric oxide in the body. It seemed to lower my blood pressure, but this weird cough started a few days after starting this supplement. It seems that basically I only feel the need to cough when I speak. According to Google, it only affects 10 percent of people.
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