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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 56 people who have side effects while taking Methylcobalamin from FDA and social media, and is updated regularly.

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What is Methylcobalamin

Methylcobalamin (latest outcomes from 66 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 Oct, 13, 2014: 56 people who reported to have side effects when taking Methylcobalamin are studied


Most common side effects over time * :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ yearsnot specified
Feeling ColdAsthmaHeart Rate DecreasedPneumoniaCerebral Haemorrhagen/aTaste DisturbanceInterstitial Lung Disease
Visual ImpairmentVomitingTachyarrhythmiaRenal ImpairmentBlood Pressure IncreasedWhite Blood Cell Count Decreased
Altered Visual Depth PerceptionJudgement ImpairedBlood Pressure DecreasedSubdural HaematomaAcne
Slow Heart BeatIrritabilityGamma-glutamyltransferase IncreasedWhite Blood Cell Count DecreasedPyrexia
Lip DryPartner StressBlood Lactate Dehydrogenase IncreasedMulti-organ FailureDecreased Appetite
IncontinenceAggressionBlood Alkaline Phosphatase IncreasedGastric Ulcer HaemorrhageCough
MydriasisJudgement ImpairedDisseminated Intravascular CoagulationIleus
Abnormal BehaviourMydriasisDuodenal Ulcer HaemorrhageVomiting
Drug DependenceIrritabilityFallPruritus
Personality ChangeAggressionMalaiseLiver Disorder

Most common side effects by gender * :

VomitingInterstitial Lung Disease
Blood Pressure IncreasedWhite Blood Cell Count Decreased
White Blood Cell Count DecreasedAcne
Cerebral HaemorrhagePyrexia
AsthmaDecreased Appetite
Skin UlcerIleus
Subdural HaematomaMalaise
Renal ImpairmentLiver Disorder
OsteoporosisPlatelet Count Decreased

Most common side effects by age * :

n/an/aGrand Mal ConvulsionConvulsionBlood Alkaline Phosphatase IncreasedPsychotic DisorderCutaneous Lupus ErythematosusInterstitial Lung Disease
VomitingLeukoencephalopathyCytomegalovirus InfectionDelusionNeutrophil Count DecreasedAcne
PyrexiaDysstasiaLarge Intestinal UlcerAbnormal DreamsAntinuclear Antibody PositiveWhite Blood Cell Count Decreased
ConstipationDysarthriaGastrointestinal InfectionSomnambulismPainDecreased Appetite
Gastrooesophageal Reflux DiseaseParaplegiaHeart Rate DecreasedAggressionSkin LesionVomiting
Weight DecreasedSpeech DisorderTachyarrhythmiaRestlessnessLymphocyte Count DecreasedCough
Gastrointestinal DisorderVisual ImpairmentBlood Pressure DecreasedOverdoseHaematocrit IncreasedMalaise
Eating DisorderNystagmusGamma-glutamyltransferase IncreasedUrinary IncontinenceErythemaPlatelet Count Decreased
White Blood Cell Count DecreasedAreflexiaBlood Lactate Dehydrogenase IncreasedAbnormal BehaviourWhite Blood Cell Count DecreasedPyrexia
ConvulsionMemory ImpairmentVisual ImpairmentHallucinationSjogren's SyndromePleural Effusion

* Some reports may have incomplete information.

Browse Methylcobalamin side effects from A to Z:

Comments for this study:

BUNNY (7 months ago):

At one point, I think you stated that cyannocobalamin(CB) is another name for methylcobalamin (MB). But 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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NOTE: The study is based on active ingredients and brand name. Other drugs that have the same active ingredients (e.g. generic drugs) are NOT considered.

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