About 8 weeks ago I started to experience muscle tremors when exercising and muscle spasms, my hamstrings completely seized for a while and I was in a lot of pain. Since then I saw my GP, blood results showed B12 level to be borderline for treatment, but because of the neurological symptoms and family history for PA my GP was prepared to treat me. 3 injections a week for 3 weeks began to improve the worse of the symptoms, then we cut down to 1 a week and symptoms returned over Christmas. Decision was made to go up to 2 a week which has happened past 2 weeks. Meanwhile tremor in arms and upper body got worse (I had a nasty virus too), GP has prescribed beta blockers for tremor as pulse was also racing, it's helped a bit. Has anyone out there experienced similar symptoms, do I need more injections. I've heard methylcobalamin is better with neurological symptoms, but my GP says its not available in UK? Anyone know a safe, reliable supplier in UK? Has anyone experienced similar symptoms and made a full recovery? I'm a Yoga teacher, so to say this is impacting my livelyhood is an understatement!