I never used that product, but it's normal to have some ED on medications that "attempt" to save your hair.
You will be bald in time, you can't prevent genetics, but taking medications like this can slow it down. My hair was falling out like crazy in my late 20's, but it slowed down once i stopped taking high doses of androgenic compounds. I still have hair and style it well, but my hairline has receded. My brother is a few years older than me and has been bald for 10 years.
Find some Cialis. You will be able to break sheet rock with your dick.