answered Apr 08, 2010 at 01:39AM
It is very popular and recommended by many healthcare providers (doctors and even vascular surgeons) in US, Canada and Europe. It works frequently and has many believers who do not need any clinical evidence. Sales are driven by discounts and incentives to doctors, stores, alternate medicine, homeopathy and pharmacies. I doubt if it can pass FDA criteria for safety and efficacy in double blind clinical trials in adequate number of patients or come out better vs creams and gels containing active drugs. The product is highly profitable to the company Boiron and it has the profits to generate hard evidence of safety and efficacy.