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The size of the dose does matter. In studies of patients who took 50 mg of Viagra, 70% reported improved erections after 12 weeks of use. But that number jumped to 82% with 100 mg, the maximum recommended dose.

If 100 mg is good, you might think 200 mg would be better, but that wasn’t the case. In studies, 200 mg of Viagra didn’t work any better than 100 mg.

In fact, above 100 mg, pretty much all you get out of more Viagra is more side effects. Abnormal vision is a problem only 11% of the time with 100 mg, but jumps to between 40% and 50% with 200 mg, for instance. One-quarter of men who use 200 mg experience facial flushing, while 15% report stomach problems.

There’s been little study of what happens when Viagra is taken at very high doses. But in one small study of 20 healthy men who took between 200 mg and 800 mg of Viagra, 95% experienced some side effect that lasted far longer than usual. Vision problems lasted as long as eight hours among the 50% of men who experienced them. And one subject taking 600 mg reported an erection lasting five hours, a potentially harmful problem.

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This entry was posted on Wednesday, September 10th, 2008 at 9:12 pm and is filed under General Information. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.