No abstract available
MeSH terms
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Drug Interactions
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Humans
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Male
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Patient Education as Topic
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Piperazines / administration & dosage*
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Piperazines / pharmacology*
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Purines
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Sexual Behavior / drug effects*
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Sildenafil Citrate
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Substance-Related Disorders / epidemiology*
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Substance-Related Disorders / prevention & control
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Sulfones
Substances
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Piperazines
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Purines
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Sulfones
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Sildenafil Citrate