i had an b12 injection 10 weeks and had a nasty reaction....i was referred to a specialist who said the allergic reaction was not to the b12 but to a chemical in the injection. i have p a and the one injection had raised my b12 level but he wanted me to take b12 tablets to keep the level up i took one tablet today and within an hour i was hurting mainly in my knees felt sick head ache faster heart and a general feel of weirdness .....
i rang my local gp who told me hed never heard of anyone being allergic to b12 and eat more liver or marmite this wasnt my own doctor.......
has anyone else heard of side effects for the injection and the tablets any advice would be much appreciated as at this moment in time a feel a freak........