B12 Contraindications & Consent

Precare, Aftercare & Consent

Anyone who has signs and symptoms of a vitamin B12 deficiency or pernicious anaemia should consult a doctor and request a full blood count as their first point of call. This can then determine whether they are or are not deficient in B12.

An intramuscular injection is a technique used to deliver a medication deep into the muscles. This allows the medication to be absorbed into the bloodstream quickly. 



-Do not consume alcohol at least 24 hours before undergoing b12 injections, as alcohol can thin the blood and increase the possibility of bruising.

-You should also avoid medications like Blood Thinners, Aspiriin or Anti Inflammatories for 3 days prior to your treatment.

*Please ensure you have thoroughly read all Contraindications below and checked all possible drug interactions against any medication you a currently taking*




Common side effects of a B12 Injection include but are not limited to:

Mild diarrhoea, upset stomach, nausea, a feeling of pain and a warm sensation at the site of the injection, a feeling, or a sense, of being swollen over the entire body, headache and joint pain.

If any of these side effects become severe or troublesome I will contact my doctor immediately.

I understand that although rare Vitamin injections can result in serious side effects. Although this is a relatively rare occurrence, anyone taking Vitamin injections should be aware of the possibility.

Uncommon side effects are much more serious than the common side effects of Vitamin B12 Injections, and such side effects should be reported to a doctor to be evaluated for seriousness.

Uncommon and dangerous side effects include:

• headache
• nausea
• diarrhea
• bloating
• constipation
• indigestion or heartburn
• abnormal bleeding
• gastrointestinal hyperactivity
• chest pain
• flushed face
• chills
• fever
• upset stomach
• kidney stones
• fingernail weakening
• hair loss
• rapid heartbeat
• heart palpitations
• restlessness
• muscle cramps and weakness
• dizziness

I understand the possibility of having an allergic reaction is quite plausible and that I should communicate with my Physician if I have any known allergic reactions to foods, dyes, preservatives, or any other substances. If I experience any of these following signs of allergic reactions I should immediately consult my doctor and discontinue further use of B12 injections.

Signs of allergic reactions include, but not limited to:
• Itching of skin
• Hives
• Rashes
• Wheezing
• Difficulty breathing
• Swelling of mouth or throat

When medications are taken in conjunction with the B12 Injection, drug interactions could occur. These interactions can either increase your risk of bleeding or block the absorption of the Vitamins into the body. These medications at the time of your injection should either be discontinued or be consulted with by a Physician.

Some of the medications that may cause drug interactions include, but are not limited to:

  • H2 receptor antagonists
  • metformin
  • proton pump inhibitors
  • aminosalicylic acid
  • arsenic trioxide
  • chloramphenicol
  • cimetidine
  • dexlansoprazole
  • esomeprazole
  • famotidine
  • lansoprazole
  • nizatidine
  • omeprazole
  • pantoprazole
  • potassium chloride
  • rabeprazole
  • ranitidine
  • ranitidine bismuth citrate

Before starting the Vitamin injections I will make sure to tell my Physician if I am pregnant, lactating or have any of the following conditions.

  • Kidney disease
  • Leber’s Disease
  • History of Kidney stones
  • Liver disease
  • Hormonal disease
  • Cardiovascular disease
  • History of ulcers
  • History of gastrointestinal problems
  • Bipolar disorder (manic depression)
  • Attention Deficit Hyperactivity Disorder (ADHD)
  • Muscular Dystrophy
  • Elliptic seizures
  • Hypoglycemia
  • Schizophrenia
  • Benign prostatic hypertrophy (BPH)
  • Acetaminophen poisoning
  • Hypertension (high blood pressure)
  • History of seizures
  • Under-active thyroid (hypothyroidism)
  • Osteoporosis
  • Receiving treatment or taking any medication that might “thin” the blood
  • Receiving treatment or taking medication that has an effect on bone marrow
  • An infection
  • Iron deficiency
  • Folic acid deficiency
  • Dependent on intravenous nutrition (TPN) or liquid nutrition products for food
  • Diabetes, mellitus, or high blood sugar levels
  • An unusual or allergic reaction other medicines, foods, dyes, or preservatives

I understand that certain herbal products, vitamins, minerals, nutritional supplements, prescription and non prescription medications may result in side effects when they interact with the Vitamin B12 Injection.

I understand that the treatment may involve risks of complication or injury from both known and unknown causes, and I freely assume those risks. Prior to receiving treatment, I have been candid in revealing any condition that may have a bearing on this procedure.

I consent and authorise all therapist’s at Skin by Paige Alexandra to use all products and equipment that make up the Vitamin B12 Injection on me. I certify that I have read this entire informed consent and I understand and agree to the information provided in the form. My questions regarding the procedure have been answered satisfactorily.

I hereby release all therapist’s at Skin by Paige Alexandra from all liabilities associated with this procedure. This consent is valid for all of my Vitamin B12 Injections in the future as well.





What To Expect:

Straight after your injection you may feel numbness to your arm and a heavy aching feeling. This usually subsides with 1 hour. 

Some common side effects are feeling or being sick and diarrhoea. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.