비아그라에 대한 새로운 단계별 지도
Shake the bottle properly for a minimum of ten seconds prior to each use. Get rid of the cap by pushing it down and twisting it counter-clockwise. Push the plunger with the syringe, then insert the tip in the bottle whilst Keeping the bottle upright on the flat area. Gradually pull again the plunger till the demanded dose. If you see air bubbles du