These types of drugs are not recommended for people who have a family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndromes, specifically types 2A or 2B
You may want to talk with a doctor about B12 shots if you regularly experience: Persistent fatigue and lethargy Muscle aches and joint pain Loss of appetite Nausea, constipation, diarrhea, or cramping Poor memory or difficulty concentrating Mood swings Can B12 Injections Help With Mood Enhancement and Mental Clarity
Oral B12 supplements rely on a complex absorption pathway in the gut involving a protein called intrinsic factor
Akar S, Duran T, Azzawri AA, et al
It takes 10 seconds and prevents potentially serious errors
Cats and small dogs: 1 mL per day Medium sized dogs (25 to 50 lbs): 2 mL per day Large sized dogs (51-100 lbs): 3 mL per day Cats: 1/4 mL Daily Dogs 110 lbs: 2 mL Daily What are Rx B12 and Rx B12 Forte for Dogs and Cats by Rx Vitamins