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Description
Dosage: 1000 mcg per week (split into 2-3 doses) via subcutaneous injection

[33] Administration Instructions Intramuscular Injection Instructions Subcutaneous Injection Instructions 503A vs 503B 503A pharmacies compound products for specific patients whose prescriptions are sent by their healthcare provider

Last Updated on April 22, 2026 When normal soreness and real warning signs are not the same thing See which post-injection symptoms usually settle quickly and which ones deserve prompt follow-up
I just wanted to say that I experienced really bad nausea (among other symptoms) when I first started b12 injections
