giving b12 injection in arm How to self administer subcutaneous injection. 1. Withdraw proper dosage from vial into an insulin syringe 2. Clean site of (abdomen or other proper site) 3. Pinch the skin where GMC: RX Size:1000 mcg/ml - 30 ml x 5 BIOVITAMIN B1B6B12 - Bio-Pharmachemie
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