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Review: taking Synthroid and CoQ10 together

Summary: drug interactions are reported among people who take Synthroid and CoQ10 together.

This review analyzes the effectiveness and drug interactions between Synthroid and CoQ10. It is created by eHealthMe based on reports of 768 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 Synthroid and CoQ10 >>>

On Mar, 26, 2015: 762 people who take Synthroid, CoQ10 are studied

Synthroid, CoQ10 outcomes

Drug combinations in study:
- Synthroid (levothyroxine sodium)
- CoQ10 (coenzyme q - 10)

Drug effectiveness over time :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ yearsnot specified
Synthroid is effective100.00%
(1 of 1 people)
(0 of 2 people)
(1 of 4 people)
(7 of 13 people)
(7 of 14 people)
(13 of 20 people)
(28 of 38 people)
(2 of 2 people)
CoQ10 is effective0.00%
(0 of 6 people)
(2 of 14 people)
(1 of 6 people)
(3 of 9 people)
(2 of 13 people)
(4 of 10 people)
(3 of 4 people)

Drug effectiveness by gender :

Synthroid is effective59.74%
(46 of 77 people)
(13 of 17 people)
CoQ10 is effective23.91%
(11 of 46 people)
(4 of 16 people)

Drug effectiveness by age :

Synthroid is effectiven/an/an/an/a44.44%
(4 of 9 people)
(8 of 10 people)
(19 of 68 people)
(28 of 78 people)
CoQ10 is effectiven/an/an/an/a37.50%
(3 of 8 people)
(2 of 7 people)
(4 of 27 people)
(6 of 66 people)

Most common drug interactions over time * :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ yearsnot specified
Pain - KneeChest TightnessHallucinationErythrosisAnxietyPancytopeniaNausea And VomitingFatigue
HyponatraemiaReactive ArthritisNight SweatsPenicilliosisSleep Apnoea SyndromePulmonary Alveolar HaemorrhageSpinal StenosisNausea
Breakthrough PainNervousnessMalabsorptionBlood Lead IncreasedNight SweatsErythema MultiformeNight SweatsPain
Vitamin D DeficiencyDiaphoresisDepressed MoodMuscle Cramps AggravatedSnoringSunburnBipolar I DisorderFlushing
Subchorionic HaemorrhageHeadacheNeuropathy PeripheralAngerIbsSinus CongestionHigh Blood Cholesterol And TriglyceridesFall
Limited Symptom Panic AttackExhaustion, Fatigue, Lethargy, Tiredness, WearinessDepressionMuscle PainPneumothoraxHypothyroidismDizziness
PhotophobiaExhaustionVertigoJoint SprainSpinal StenosisRefluxHeadache
Muscle CrampsPainType 2 Diabetes MellitusNausea And VomitingDistended AbdomenDepressionArthralgia
Vision BlurredHyponatraemiaBladder InfectionCoughVision BlurredSunburnPain In Extremity
Hypertension AggravatedUrticaria ChronicPain - KneeSinus ArrhythmiaExhaustion, Fatigue, Lethargy, Tiredness, WearinessFlushingDyspnoea

Most common drug interactions by gender * :

NauseaRenal Failure
HeadacheDiabetes Mellitus
Pain In ExtremityNeuropathy Peripheral

Most common drug interactions by age * :

n/aEndotracheal Intubation ComplicationBlood Pressure Increasedn/aAnaemiaPneumoniaNauseaFatigue
Drug IneffectiveCardiomegalyFatigueVarices OesophagealFatigueFall
Heart Rate IncreasedHepatic SteatosisHepatitis CPainNausea
DepressionGait DisturbanceHeadachePain
Congestive CardiomyopathyOesophageal HaemorrhageNeck PainPain In Extremity
Intracardiac ThrombusOsteonecrosisBone PainMalaise
Renal FailureCognitive DisorderAtelectasisDyspnoea
AnxietyDeep Vein ThrombosisNasal CongestionAsthenia
Ventricular FibrillationDehydrationOedema PeripheralHeadache

* 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.

Get connected: join our support group of Synthroid and CoQ10 on

Do you take Synthroid and CoQ10?




You are not alone! Join a related support group:
- support group for people who take CoQ10
- support group for people who take Synthroid

Recent related drug studies (Check your drugs):

Complete drug side effects:

On eHealthMe, Synthroid (levothyroxine sodium) is often used to treat hypothyroidism. Coq10 (coenzyme q - 10) is often used to treat health. 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.

You may report adverse side effects to the FDA at or 1-800-FDA-1088 (1-800-332-1088).

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.


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