Clinical history
We review relevant symptoms, medical conditions, allergies, medicines and any previous B12 treatment.
H Sweeny Chemist · Serving Derry since 1894 Go to NHS pharmacy care →
Vitamin B12 injection service in Derry
Professional assessment before treatment.
A convenient, pharmacist-led Vitamin B12 injection service with an individual suitability assessment and face-to-face care.
Your appointment
Safe care starts with understanding your health.
Vitamin B12 treatment is not automatically suitable for everyone. Your appointment includes a clinical assessment before any injection is offered.
Suitability assessment
A healthcare professional considers whether the service is appropriate and whether further investigation or referral may be needed.
Treatment when appropriate
A Vitamin B12 injection is administered only when the clinical assessment supports treatment and it is safe to proceed.
Clear aftercare
We explain possible reactions, what to expect afterwards and when to seek further medical advice.
Important information
Symptoms can have more than one cause.
Tiredness, weakness, memory problems or altered sensation should not automatically be assumed to be caused by low Vitamin B12. Depending on your history and symptoms, testing or assessment by your GP or another appropriate clinician may be recommended.
This service does not promise a general energy or wellness boost. Treatment is offered only when appropriate following the consultation.
Please tell us about
- Previous B12 deficiency, testing or treatment
- Current medicines and supplements
- Allergies or previous injection reactions
- Pregnancy or breastfeeding
- New, severe or worsening symptoms
Serving the North West
Accessible local care in Derry.
Our service is based at Quayside Shopping Centre and is convenient for patients from Derry, Donegal, Strabane, Limavady, Coleraine and surrounding areas.
Common questions
Helpful information before you book.
Is a B12 injection guaranteed when I book?
No. A healthcare professional assesses suitability first and may recommend testing or another form of medical assessment instead.
Will a B12 injection give everyone more energy?
No. Tiredness has many possible causes, and B12 treatment is not a general energy boost. Symptoms should be assessed appropriately.
What information should I bring?
Bring details of previous B12 testing or treatment, your medicines and supplements, allergies and relevant medical conditions.
Clinical content reviewed byKillian Johnston
Pharmacist Independent Prescriber · Owner, H Sweeny Chemist
Last reviewedAugust 2026
Content is reviewed regularly and updated when services or clinical guidance change.
Book your appointment
Arrange a Vitamin B12 consultation.
Your healthcare professional will review suitability and explain the next step. An injection is provided only if clinically appropriate.