Suggest Remedy For Pain In Muscles And Cramps In Legs

Hi, Doctor, Greetings to you. I am 82 years, Male, 5 -7 and not over weight. I had pain in my Muscles (in the arms and legs and suffer from Cramps in the legs in the night. Someone suggested FENAK PLUS 2 Tabs a day. My hunger has diminished, constipated with no proper bowel movement. Please suggest me the remedy for my trouble and Medicine for my muscles pains. I would be thankful to your goodself.