Just curious if anyone has taken hydroxocobalamin (preservative free) injections and, if so, how much, frequency and did they experience any bad reactions? My functional doc has prescribed 1mg/1ML injections every other day for 10 days, then every 2 weeks for 8 times, then once per month for maintenance. This appears to be the right form for me based on SNPs; and I'm extremely low on B12 and folate. However, is this too high/frequent a dose and are side effects likely?