My daughter, who is now 2, was born with a hemangioma on her genitals, which ulcerated deeply. We treated with Propranalol starting at the age of four months. While I was wary at first, I now wish I would've done it sooner. She was in agonizing pain. She was monitored in the hospital while starting the medicine, and we had to do several take home heart monitors over the next few months to make sure her heart wasn't affected. She saw a cardiologist, too, and he told us that he would never know she was on the drug just by her scans. It's been around for so long and used safely. Good luck with your decision.