Imiquimod
"I was diagnosed with anal HPV last month. This week will be my 5th week on this creme and since last week I noticed my GW are gone! I didn't have serious pain, but there was some redness, itching, and mild pain, but that's how u know it's working.  The goal was "irritation" my doctor said.  I used it 5x's a week before bedtime for 3 weeks then when it got irritated I went to 3 x's a week. I used the entire packet at each application and rubbed the creme into the wart and surrounding skin. I did get itching about 4 hours after application. In the mornings I washed it off. I'm happy this medicine worked for me. Don't be afraid to try it."