The content of this book seeks to raise the reader's awareness of the responsible use of medicines such as sildenafil and invites the various sectors of the medical and pharmaceutical world to participate actively in pharmacovigilance. This is in recognition of the pharmaceutical industry's efforts to produce more effective and safer medicines for the consumer based on quality management models and continuous improvement. The active participation of users who are aware of the risk of self-medication, together with the execution of timely warnings of adverse drug reactions, allows the development of pharmaceutical products with better tolerance and safety profiles. In addition, research into the various studies that accompany the development of new medicines and modifications to currently marketed medicines should be sponsored.