No abstract available
MeSH terms
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Dietary Supplements / adverse effects
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Dietary Supplements / standards*
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Drug Contamination / legislation & jurisprudence
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Drug Contamination / prevention & control*
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Erectile Dysfunction / therapy
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Humans
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Male
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Phosphodiesterase 5 Inhibitors / adverse effects
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Phosphodiesterase 5 Inhibitors / standards*
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Piperazines / adverse effects
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Piperazines / standards*
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Purines / adverse effects
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Purines / standards
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Sexual Behavior / drug effects
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Sildenafil Citrate
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Sulfones / adverse effects
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Sulfones / standards*
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United States
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United States Food and Drug Administration
Substances
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Phosphodiesterase 5 Inhibitors
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Piperazines
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Purines
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Sulfones
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Sildenafil Citrate