Vitamin B12 Shot IM Injection Are you feeling sluggish, forgetful, or run down
Key Aftercare Tips Stay Hydrated Drinking plenty of water is crucial after receiving a B12 injection
Here are the main signs and symptoms of B12 deficiencies that show up at this stage of life: Tiredness and fatigue Difficulty thinking or memory issues Low moods such as apathy, depression, or irritability Digestive complaints Issues staying asleep Feeling like your heart is racing and pounding Other common complaints include Numbness, tingling, or other altered nerve like sensations in your body such as burning feet Clumsiness, balance, or gait problems Development of tremors Vision changes Feeling light-headed, weak, or dizzy Feeling short of breath Having an inflamed red tongue Loss of appetite Cardiovascular complications Bone loss You can assess your B12 levels in a few different ways You can test B12 on its own and depending on where you live in the world this range varies significantly, which is insane

This position is supported by the NICE Guideline and at the end of 2025 we launched our freely accessible Pernicious Anaemia and B12 Deficiency education programme to the NHS community
2025 [cited 31 Dec 2025] Cyanocobalamin (intramuscular route)-Description and Brand Names - Mayo Clinic [Internet]