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Review: taking Warfarin and Vitamin D together

Summary: drug interactions are reported among people who take Warfarin and Vitamin D together.

This review analyzes the effectiveness and drug interactions between Warfarin and Vitamin D. It is created by eHealthMe based on reports of 395 people who take the same drugs from FDA and social media, and is updated regularly.


You are not alone: join a support group for people who take Warfarin and Vitamin D >>>

On Mar, 29, 2015: 395 people who take Warfarin Sodium, Vitamin D are studied

Warfarin Sodium, Vitamin D outcomes

Drug combinations in study:
- Warfarin Sodium (warfarin sodium)
- Vitamin D (ergocalciferol)

Drug effectiveness over time :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ yearsnot specified
Warfarin Sodium is effective50.00%
(1 of 2 people)
(5 of 8 people)
(5 of 6 people)
(4 of 7 people)
(7 of 10 people)
(8 of 10 people)
(10 of 11 people)
Vitamin D is effectiven/a45.45%
(5 of 11 people)
(2 of 8 people)
(4 of 12 people)
(3 of 9 people)
(2 of 4 people)
(3 of 4 people)

Drug effectiveness by gender :

Warfarin Sodium is effective72.41%
(21 of 29 people)
(19 of 25 people)
Vitamin D is effective45.45%
(10 of 22 people)
(9 of 26 people)

Drug effectiveness by age :

Warfarin Sodium is effectiven/an/an/an/a100.00%
(2 of 2 people)
(4 of 17 people)
(11 of 39 people)
(23 of 42 people)
Vitamin D is effectiven/an/an/an/a100.00%
(1 of 1 people)
(0 of 11 people)
(8 of 37 people)
(10 of 37 people)

Most common drug interactions over time * :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ yearsnot specified
International Normalised Ratio IncreasedDizzinessDizzinessMemory LossDizzinessSleepyOsteoporosisDehydration
Loss Of ConsciousnessHeadacheMuscle OedemaLiver Function Test AbnormalMuscle TwitchingTremorTremor - EssentialAnaemia
AnaemiaVomitingShoulder PainTirednessShort-term Memory LossHyporeflexiaLiver Function Tests Nos AbnormalPain In Extremity
ExcoriationSleepyOsteoporosisMuscle SpasmsDiarrhoeaGait AbnormalImpaired VisionAsthenia
SomnolenceHeart RateAbdominal RigidityDiarrhoeaInterstitial Lung DiseaseDizzinessEdema - Peripheral, Peripheral EdemaPain
Confusional StateMuscle PainBack Pain - LowMuscle TwitchingTinnitusFatigue - ChronicErectile DysfunctionDiarrhoea
Blood Calcium DecreasedConstipationHair LossDelayed Gastric EmptyingHyperacusisCognitive DeteriorationVomitingNausea
Nephrogenic Systemic FibrosisHallucinations, MixedInterstitial Lung DiseaseExhaustion, Fatigue, Lethargy, Tiredness, WearinessMyelomalaciaLoss Of Sensation, Numbness And Tingling, Paresthesias, Sensory Loss, Tingling And NumbnessElevated PotassiumHypertension
Joint ContractureParanoiaGerdCough AggravatedVision ImpairmentInsomniaDizzinessPneumonia
Musculoskeletal StiffnessConfusionVenous InsufficiencyHair LossSensory DisturbanceTremor - EssentialLiver Function Test AbnormalOedema Peripheral

Most common drug interactions by gender * :

Pain In ExtremityAsthenia
Oedema PeripheralFall
International Normalised Ratio IncreasedRenal Failure Acute
Cardiac Failure CongestiveGastritis

Most common drug interactions by age * :

n/an/an/aConstipationHead InjuryNauseaDizzinessDehydration
Urinary RetentionHeadacheInsomniaTremorDiarrhoea
InfectionHaematomaAnaemiaPulmonary EmbolismFall
Renal Papillary NecrosisHaematocrit DecreasedThrombosisInternational Normalised Ratio IncreasedAsthenia
DehydrationFallIntervertebral Disc DegenerationDiarrhoeaInternational Normalised Ratio Increased
Abdominal PainLethargyPneumoniaChest PainPain In Extremity
HaematuriaChest DiscomfortCandidiasisDyspnoeaNausea
Weight DecreasedDiarrhoeaAstheniaPatella FractureAtrial Fibrillation
Rectal HaemorrhageWeight DecreasedDyspnoeaFeeling ColdRenal Failure Chronic

* Some reports may have incomplete information.

How to use the study: print a copy of the study and bring it to your health teams to ensure drug risks and benefits are fully discussed and understood.

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You are not alone! Join a related support group:
- support group for people who take Vitamin D
- support group for people who take Warfarin Sodium

Recent related drug studies (Check your drugs):

Complete drug side effects:

On eHealthMe, Warfarin Sodium (warfarin sodium) is often used to treat atrial fibrillation/flutter. Vitamin D (ergocalciferol) is often used to treat rickets. Find out below the conditions the drugs are used for, how effective they are, and any alternative drugs that you can use to treat those same conditions.

What is the drug used for and how effective is it:

Other drugs that are used to treat the same conditions:

NOTE: The study is based on active ingredients. Other drugs that have the same active ingredients are also considered.

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only, and has not been supported by scientific studies or clinical trials unless otherwise stated. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

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