Suggest Medicine To Help Wounds Heal Fast

Hi sir, 1 month back i admitted in hospital for skin grafting...doctor did that surgery....but the problem is...they removed the skin from thigh and replaced on wound that wound is getting heal but the donor site where they removed the skin is taking time to heal..its already one month finished still its not properly healed...is there any medicine for quick heal....please help me with your valuable suggestion. Thanks in advance, Satish....