I have been prescribed glucosamine tabs for pain in my knee. But yesterday teh specialist advised me to start oral hyal as well 1xod. On reading the internet I find the use of oral hyal and glucosamine is almost the same. Hyal is supposed to be a new drug which was coming as an injection earlier. I want to know whether I can continue to take both oral hyal and glucosamine tabs together. Please advise. I am 58 years old and have been suffering from stiffness in my knees for 3 years.