비아그라에 대한 주요 지침
The following nonprescription or herbal items may possibly communicate with sildenafil: cimetidine (Tagamet HB), St. John's wort. Make sure you let your physician and pharmacist know that you are getting these remedies before you start having sildenafil.The commonest side effects of VIAGRA: headache; flushing; upset belly; abnormal eyesight, for ex