I am 66 years old. recently went onto warfarin tablets. i am developing pain in my muscles, arms, legs everywhere. can this be related to the tablets?

Yes: Uncommon but these ARE known side effects of Warfarin; it can also have fatal side effects from excess bleeding. I don't prescribe it as many other drugs,supplements and foods interact and there are adverse effects from avoiding Vitamin K. There are other drugs to thin blood and natural blood-thinners like curcumin,nattokinase,lumbrokinase,ginger,Vit E and Fish oil. See your Dr.before stopping.