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Author: Admin | 2025-04-28
Prescription medications and natural health supplements. This may change the effectiveness of the medicine or cause side effects.Medicines that increase the levels of Viagra: ritonavir or saquinavir (for HIV) - greatly increase Viagra levels which increases the risk of side effects erythromycin, ketoconazole or itraconazole (for infections) - these can increase the amount of time Viagra stays in the body, increasing the risk of side effects grapefruit and its juice - can slightly increase Viagra levels in the bodyMedicines that decrease the levels of Viagra: rifampin (used for TB) - reduces the levels of Viagra in the blood bosentan (for high blood pressure in the vessels that carry blood to the lungs) - reduces levels of ViagraMedicines that may affect blood pressure: amyl nitrite (“poppers”) - can lower blood pressure to dangerously low levels. riociguat (for high blood pressure in the lungs’ blood vessels) - may significantly lower blood pressure alpha-blockers (for high blood pressure or an enlarged prostate) - can increase the risk of side effectsIf you have a condition or take a medicine that is not listed, check with your doctor before using any ED treatment. For a complete list of Viagra interactions, please use the BNF interaction checker. What safety advice should be followed when using Viagra? For more information, refer to the safety information table below: Category Status Advice Alcohol Avoid Drinking alcohol may affect your ability to get an erection. It is recommended to avoid drinking excessive amounts of alcohol before taking this medicine. Driving
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