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  • Viagra: Side Effects and What to Do About Them – Healthline

    Viagra: Side Effects and What to Do About Them – Healthline Viagra (sildenafil) is an effective option for treating erectile dysfunction (ED). Generally, you should take Viagra about 1 hour before engaging in sexual activity. But this isn t a hard-and-fast rule. Viagra can start working in as little as 30 minutes for some people,…