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Review: Methylcobalamin side effects

In this review, we analyze Methylcobalamin side effects by the time on the drug, gender and age (0-60+) of the people who have side effects while taking Methylcobalamin. The review is based on 55 people who have side effects while taking Methylcobalamin from FDA and social media, and is updated regularly.

What is Methylcobalamin

Methylcobalamin (latest outcomes from 63 users) has active ingredients of vitamin b12. It is often used in anaemia vitamin b12 deficiency.

It can also be called: B12, B-12, B Complex Vitamin, Bedumil, Cobamin, Cobalamin, Cyanocobalaminum, Cycobemin, Hydroxocobalaminum, Hydroxocobemine, Idrossocobalamina, Vitadurin.

On Apr, 13, 2014: 55 people who reported to have side effects when taking Methylcobalamin are studied

 outcomes

Side effects over time * :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ yearsnot specified
Feeling Cold
(1 report)

Visual Impairment
(1 report)

Altered Visual Depth Perception
(1 report)

Slow Heart Beat
(1 report)

Lip Dry
(1 report)

Incontinence
(1 report)

Asthma
(3 reports)

Vomiting
(3 reports)

Judgement Impaired
(1 report)

Irritability
(1 report)

Partner Stress
(1 report)

Aggression
(1 report)

Mydriasis
(1 report)

Abnormal Behaviour
(1 report)

Drug Dependence
(1 report)

Personality Change
(1 report)

Gamma-glutamyltransferase Increased
(2 reports)

Tachyarrhythmia
(2 reports)

Heart Rate Decreased
(2 reports)

Blood Alkaline Phosphatase Increased
(2 reports)

Blood Lactate Dehydrogenase Increased
(2 reports)

Blood Pressure Decreased
(2 reports)

Judgement Impaired
(1 report)

Mydriasis
(1 report)

Irritability
(1 report)

Aggression
(1 report)

Pneumonia
(2 reports)

Renal Impairment
(2 reports)

Subdural Haematoma
(2 reports)

White Blood Cell Count Decreased
(2 reports)

Multi-organ Failure
(2 reports)

Gastric Ulcer Haemorrhage
(2 reports)

Disseminated Intravascular Coagulation
(2 reports)

Duodenal Ulcer Haemorrhage
(2 reports)

Fall
(2 reports)

Malaise
(1 report)

Cerebral Haemorrhage
(2 reports)

Blood Pressure Increased
(2 reports)

n/aTaste Disturbance
(1 report)

Interstitial Lung Disease
(9 reports)

White Blood Cell Count Decreased
(7 reports)

Acne
(6 reports)

Pyrexia
(6 reports)

Decreased Appetite
(5 reports)

Cough
(5 reports)

Ileus
(5 reports)

Vomiting
(4 reports)

Pruritus
(4 reports)

Liver Disorder
(4 reports)

Side effects by gender * :

FemaleMale
Common side effects Vomiting
(4 reports)

Blood Pressure Increased
(3 reports)

White Blood Cell Count Decreased
(3 reports)

Cerebral Haemorrhage
(3 reports)

Asthma
(3 reports)

Pneumonia
(3 reports)

Skin Ulcer
(2 reports)

Subdural Haematoma
(2 reports)

Renal Impairment
(2 reports)

Osteoporosis
(2 reports)

Interstitial Lung Disease
(9 reports)

Pyrexia
(6 reports)

Acne
(6 reports)

White Blood Cell Count Decreased
(6 reports)

Cough
(5 reports)

Decreased Appetite
(5 reports)

Malaise
(5 reports)

Ileus
(5 reports)

Liver Disorder
(4 reports)

Platelet Count Decreased
(4 reports)

Side effects by age * :

0-12-910-1920-2930-3940-4950-5960+
Common side effects n/an/aGrand Mal Convulsion
(2 reports)

Vomiting
(2 reports)

Pyrexia
(2 reports)

Constipation
(2 reports)

Gastrooesophageal Reflux Disease
(2 reports)

Weight Decreased
(2 reports)

Gastrointestinal Disorder
(2 reports)

Eating Disorder
(2 reports)

White Blood Cell Count Decreased
(2 reports)

Convulsion
(1 report)

Convulsion
(2 reports)

Leukoencephalopathy
(1 report)

Dysstasia
(1 report)

Dysarthria
(1 report)

Paraplegia
(1 report)

Speech Disorder
(1 report)

Visual Impairment
(1 report)

Nystagmus
(1 report)

Areflexia
(1 report)

Memory Impairment
(1 report)

Blood Alkaline Phosphatase Increased
(2 reports)

Cytomegalovirus Infection
(2 reports)

Large Intestinal Ulcer
(2 reports)

Gastrointestinal Infection
(2 reports)

Heart Rate Decreased
(2 reports)

Tachyarrhythmia
(2 reports)

Blood Pressure Decreased
(2 reports)

Gamma-glutamyltransferase Increased
(2 reports)

Blood Lactate Dehydrogenase Increased
(2 reports)

Visual Impairment
(1 report)

Psychotic Disorder
(1 report)

Delusion
(1 report)

Abnormal Dreams
(1 report)

Somnambulism
(1 report)

Aggression
(1 report)

Restlessness
(1 report)

Overdose
(1 report)

Urinary Incontinence
(1 report)

Abnormal Behaviour
(1 report)

Hallucination
(1 report)

Cutaneous Lupus Erythematosus
(1 report)

Neutrophil Count Decreased
(1 report)

Antinuclear Antibody Positive
(1 report)

Pain
(1 report)

Skin Lesion
(1 report)

Lymphocyte Count Decreased
(1 report)

Haematocrit Increased
(1 report)

Erythema
(1 report)

White Blood Cell Count Decreased
(1 report)

Sjogren's Syndrome
(1 report)

Interstitial Lung Disease
(9 reports)

Acne
(6 reports)

White Blood Cell Count Decreased
(6 reports)

Decreased Appetite
(5 reports)

Vomiting
(5 reports)

Cough
(5 reports)

Malaise
(5 reports)

Platelet Count Decreased
(4 reports)

Pyrexia
(4 reports)

Pleural Effusion
(4 reports)

* Some reports may have incomplete information.

Browse Methylcobalamin side effects from A to Z:

Comments for this study:

BUNNY (4 days ago):

At one point, I think you stated that cyannocobalamin(CB) is another name for methylcobalamin (MB). But I.ve read that MB is produced naturally by the body if there are normal conditions, and CB is a synthetic form of vitamin B-12.
The distinction is important: On CB, one female had rapid, pounding heart beat w/chest pain and malaise. But on MB, no side effects. Important because she has pernicious anemia and needs B-12 supplementation.
Any other experiences like this?
Reply the comment

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Comments from related studies:

  • From this study (3 weeks ago):

  • I have had all kinds of test done. nerve blocks, botox injections in groin area, mri, ultrasound of pelvis, therapy. You name it I have had it. I am seeing a chiropractic Dr now he states that I have a sciatic nerve in my back which is causing the the groin pain. Nothing has help. Could the Medecines that I am taking be causing the pain that I am constantly having. PLEASE HELP ME.

    Reply

  • From this study (4 weeks ago):

  • suspicious lung nodule seen in x-ray, going in for a cat scan

    Reply

  • From this study (4 weeks ago):

  • About once every week or so. Can be severe with stomach cramps. I take 10,000 units of biotin each day and the hair growth is good.

    Reply

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