Hi i was diagnosed with PA in nov 7 yrs after crohns bowel surgery. My B12 level was 160 and i was suffering from fatigue, palpitations, anxiety, muscle spasms. I felt fine on the loading dose although im being re-checked due to symptoms returning. I couldnt take the 5mg daily folic acid or any iron suppliments due to the awful nausia and headaches i had. It made me unable to work or eat. Are there alternative doses? My GP wouldnt prescribe anything else.