비아그라 옵션
The next nonprescription or herbal goods may well interact with sildenafil: cimetidine (Tagamet HB), St. John's wort. Make sure to let your doctor and pharmacist know that you are having these remedies before you start taking sildenafil.Serious coronary heart signs like speedy, irregular, or pounding heartbeats; fluttering in the chest; shortness o