Hi & Welcome to HCM. I can understand your concern. Cialis (Tadalfil) or Levitra (Vardenafil) are the alternative medications. Cialis is a phosphodiesterase type 5 inhibitor PDE-5 inhibitor like Viagra (Sildenafil) and acts in a similar fashion. It can be taken as and when needed. It can also be taken every day at lower doses of 2.5mg to 5mg. The main benefit of Cialis as an alternative to Viagra is that its action lasts for around 36 hours, making this a popular drug for weekend use. It also has a more rapid onset of action- having an effect in around 30 minutes- as opposed to an hour for Viagra. Cialis is the favourite amongst more spontaneous men. Besides, you need to have certain lifestyle changes such as exercising, losing weight, stopping smoking & alcohol, and managing stress can have a large impact on sexual performance. Hope you will find the suggestions useful in getting rid of erectile dysfunction. Regards.