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Reviewed by Dr. James Mitchell, PharmD — Updated May 2025. A step-by-step dosage comparison for men deciding between the standard 100mg dose and the maximum 200mg strength.
| Feature | 💊Choose 100mg if... | 💊Choose 200mg if... |
|---|---|---|
| Sildenafil dose | 100mg | 200mg |
| Who it's for | Mild-to-moderate ED, most men | Severe ED, when 100mg is insufficient |
| Effectiveness | Excellent for most men | Stronger — for treatment-resistant cases |
| Side-effect risk | Moderate | Higher — more headache, flushing, dizziness |
| Starting cost | From $80 per 90 tablets | From $95 per 90 tablets |
| Medical guidance needed | Recommended but not mandatory | Strongly recommended |
| Best suited for | First-time users, most men with ED | Men who've tried 100mg–150mg without success |

Lead Pharmacist · Reviewed May 2025
For the vast majority of men, 100mg is the right choice. It provides strong efficacy for mild-to-moderate ED with a manageable side-effect profile. 200mg is reserved for men who have genuinely tried 100mg–150mg consistently and found it insufficient. Don't jump straight to 200mg — work up through 100mg and 150mg first. Higher doses don't mean faster or more reliable results; they primarily mean higher side-effect risk.