バイアグラバイアグラFreq.FrequencyTop 50,000Meanings1nounViagratrademarkBrand name for sildenafil citrate, a medication for erectile dysfunction. Used as a common noun in Japanese.バイアグラは医い師しの処しょ方ほう箋せんが必ひつ要ようです。Viagra requires a doctor's prescription.