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Overview
Vitamin B12 is essential for energy, nerve function and red blood cell production, and deficiency can cause tiredness, weakness and pins and needles.
1
Assessment before treatment
We review your symptoms, diet, medicines and any recent blood tests before giving an injection.
Quick intramuscular injection
The injection is given into the upper arm and takes only a few minutes, with maintenance doses arranged as needed.
Hippocrates
Who this service is for
Adults with a confirmed B12 deficiency needing maintenance treatment
People following a vegan or strictly vegetarian diet
People taking metformin or long term acid-reducing medicines
Adults with absorption problems, including after bowel surgery
People already established on B12 injections elsewhere
Anyone allergic to hydroxocobalamin or cobalt
Anyone with Leber's hereditary optic neuropathy
Anyone seeking injections purely for energy without evidence of deficiency, where we will advise on alternatives
Anyone who has not had recent blood tests, where we may recommend testing first
People with symptoms suggesting an undiagnosed cause, who need GP review
People who are pregnant or breastfeeding
Anyone with a history of cobalt or hydroxocobalamin sensitivity
Our clinician will review your medical history and travel plans before confirming whether this service is suitable for you.
Public-health guidance
Watch official NHS public-health videos
Frequently asked questions
How do I know if I need a B12 injection?
Symptoms like persistent tiredness, brain fog and pins and needles can suggest low B12, but they have many causes. Our assessment, ideally with a recent blood result, guides the decision.
How often will I need injections?
It varies. A common maintenance pattern is one injection every 12 weeks, agreed individually at your assessment.
Do I need a blood test first?
A recent result helps and is sometimes necessary. If you have one, bring it along. If not, we will advise whether testing makes sense before starting.
How quickly will I feel a difference?
Some people notice improved energy within days; for others it takes a few weeks. Response depends on how low your levels were and the cause.
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North Harrow Clinic, inside Health Pharmacy
5 Broadway Parade
Pinner Road
North Harrow
Middlesex
HA2 7SY
0208 427 2110
info@northharrowclinic.co.uk
Pharmacy opening hours
Monday to Friday: 9am - 7pm
Saturday: 9am - 6pm
Sunday: Closed
Clinic appointments
Available Monday, Wednesday, Thursday and Friday
No appointments on Tuesdays or Saturdays