Before taking Viagra, understand potential drug interactions. Some combinations can be dangerous.
Critical: Do NOT Combine
Nitrates: The most dangerous interaction. Nitrates (for chest pain) with Viagra can cause a severe, life-threatening drop in blood pressure.
Alpha-Blockers: May cause low blood pressure and dizziness.
Other ED meds: Do not take with Cialis, Levitra, or other PDE5 inhibitors.
Lifestyle Factors
- Heavy alcohol reduces effectiveness
- Grapefruit juice increases side effect risk
- High-fat meals delay absorption
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