Hi, read through a few old posts on this but the last reply I could find was 120 days old apparently so thought I'd ask again.....been prescribed 20,000 ui D3 twice a week for the next 8 weeks as my level is very low apparently. I asked for the blood test so was surprised when it came back that low but reading other info I do take a daily PPI so that could be the reason. Trouble is now, as with most meds, I am worrying about whether the dose will give me side affects after reading a few posts. I wish Dr had given me lower dose maybe daily but don't want to question her decision and she said it could explain my anxiety and low mood so want to help myself. I'm useless at medication and because my anxiety is so high at the moment I am scared to take it. I'm mainly worried about heart palps or such. Also, keep reading such conflicting advice such as it should be taken with K2 and magnesium but I am confused and don't want to start supplementing myself. Anyone taken the mega dose ....everybody seems to have lower doses or spaced out tablets? I know Sarai had big problems.