Yes, that is a fact.
What?
It probably wasn't for the purpose of child prostitution. It's much more likely that he was having sex with adult, female prostitutes. Regardless, the trip was obviously sexual in nature - he wouldn't have been carrying Viagra otherwise.
When someone travels to one of the world's poorest regions and a major haven for prostitution as a means for survival, and where American cameras don't always look, and where that person has unlawful Viagra... well, certain notions become particularly believable.
For those who would like a source....
http://www.cbsnews.com/stories/2006/06/27/national/main1753947.shtml
and quote mr. Rush: i had a great time in the Dominican Republic, wish I could tell you about it reply your question, nah, he may be a junkie and the most overpaid liar in the world, but I'm certain all of the many, numerous prostitutes he solicited were of legal age.
I'd have to say no until you can supply a link to your source of information.