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The abdomen is often preferred for steady absorption, but all areas are suitable

Antibiotic IM Injection : Penicillin and similar antibiotics often require 21G-22G 38mm needle sizes for gluteal muscle injection

B12 supplements can interact with certain medicines, including: Chloramphenicol (Chloromycetin Sodium Succinate) Proton pump inhibitors Metformin (Glucophage, Glumetza, Riomet) Gastric acid inhibitors If youre taking any of these medications, talk to your doctor or pharmacist before starting a B12 supplement

Patients who are breastfeeding or planning to breastfeed should inform their healthcare provider

Medications: Long-term use of antacids and metformin can impact B12 absorption