I am 31 years old. I was first on warfarin when I was 15. I was on the BCP and a smoker as well. just 2 months of being on the pill I developed a DVT in my left leg. I was on the warfarin for about 2 years then came off. I reember being tired alot but that was it. Then again when I was 22 I developed yet again another DVT in my L leg.. as well as 3 PE in my lungs. I was prescribed warfarin and I was on that for 2 years .. was taken off due to dizzy spells. Now again I am on warfarin .. for the rest of my life. I have a genetic disorder for clots and had a mini stroke. By the grace of GOD I only have a limp in my right foot... the side effects I experiance now are dizzy spells, headaches, blurred vision, and muscle aches and spasms. If your docot is denieying these side effect they really just dont think its serious enough to take you off. All my doctors over the last 16 years have all told me of these side effects. What you eat and drink has alot to do with it and other meds you may be takeing. I am also on chantex and beleive the two together are to be the cuas se of my syptoms. I also experiance tingling for shor periods. I have been on it now for one week. My doctor told me once it is regulated to a point where I dont have to up my dosage or lower my dosage and I am pretty much at a steady dosage the side effect will cease, until then I think if you dont like your docotor and dont beleive hes looking out for you in your best interrest yo ushould find another one.... Thats important... you must have a docotor you can trrust and one whom will listen to you.