Men who have ED are not able to develop or maintain a rigid penis during sexual activity. The symptoms may be caused by a variety of stress-related factors, medical problems, and ways in which people maintain quality of life. Several different varieties of drugs can be used to treat this problem. Oral ED Pills consist of sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), and avanafil (Stendra). These medications improve the flow of blood to the penis, which allows males to maintain sufficient erection for sexual activity. A person must seek professional medical advice from a health practitioner before picking their optimal treatment method based on their evaluation results.