Levothyrox Side Effects summary

Total Levothyrox reports: 27. View

Levothyrox FDA safety alerts: 2004 .

Reported deaths: 43

Reported hospitalizations: 200.

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Recently reported Levothyrox Side Effects

Great weight gain, especially in upper belly (abov...

Arthritis, fatigue, gain of weight, angina pectori...

I was experiencing severe muscular pain, abdominal...

Massive weight gaind for they year that I took it....

Wieght gain, moodiness, poor sleep...


Common Levothyrox Side Effects
Cardiac failure 4
Cytolytic hepatitis 4
Fall  What is  Fall                                                                                                                                                                                                    4
Renal failure acute 4
Anaemia 3
Cholestasis 3
Balance disorder 2
Cardio-respiratory arrest 2
Condition aggravated 2
Cough 2
Dialysis  What is  Dialysis                                                                                                                                                                                                2
Dyspnoea 2
Hyperkalaemia 2
Hypersensitivity 2
Leukocytosis 2
Lymphadenopathy 2
Malaise 2
Orthostatic hypotension 2
Pneumonia  What is  Pneumonia                                                                                                                                                                                               2
Abdominal pain upper 1
Acidosis 1
Acne cystic 1
Acute coronary syndrome 1
Agitation 1
Angioneurotic oedema 1
Aphthous stomatitis 1
Atrial fibrillation  What is  Atrial fibrillation                                                                                                                                                                                     1
Autoimmune thrombocytopenia 1
Blood alkaline phosphatase increased 1
Blood pressure diastolic decreased 1
Blood thyroid stimulating hormone increased 1
Breast cancer  What is  Breast cancer                                                                                                                                                                                           1
C-reactive protein increased 1
Caesarean section 1
Cardiac murmur 1
Cardiovascular disorder 1
Cerebral haematoma 1
Cerebral ischaemia 1
Cerebral ventricle dilatation 1
Confusional state 1
Conjunctivitis 1
Cytomegalovirus antibody positive 1
Dehydration 1
Delayed closure of cranial sutures 1
Depression  What is  Depression                                                                                                                                                                                              1
Dermatitis bullous 1
Dysmorphism 1
Dyspnoea exertional 1
Echography abnormal 1
Endocarditis staphylococcal 1
Eosinophilia 1
Epistaxis 1
Face oedema 1
Fungal skin infection 1
Gamma-glutamyltransferase increased 1
Gastroenteritis  What is  Gastroenteritis                                                                                                                                                                                         1
Gastrointestinal haemorrhage 1
Gingival bleeding 1
Haemoglobin decreased 1
Hepatic enzyme increased 1
Hepatomegaly 1
Hyperventilation 1
Hypokalaemia 1
Hyponatraemia 1
Hypotonia neonatal 1
Ichthyosis 1
International normalised ratio increased 1
Ischaemic cardiomyopathy 1
Leukoencephalopathy 1
Lymphopenia 1
Malignant hypertension 1
Monoparesis 1
Multiple congenital abnormalities 1
Musculoskeletal stiffness 1
Myocardial infarction 1
Neutropenia 1
Neutrophil count increased 1
Papilloedema 1
Porphyria non-acute 1
Prothrombin time prolonged 1
Pulmonary oedema 1
Pustular psoriasis 1
Respiratory distress 1
Supraventricular extrasystoles 1
Ventricular fibrillation 1
Visual acuity reduced 1
Visual disturbance 1
Vomiting 1
White blood cell count decreased 1

Did You Have Levothyrox Side Effect?

Levothyrox Side Effects Poll Results

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Yes, Moderate
Yes, Minor
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Have you experienced side effects?
Yes, Severe95%
Yes, Mild4%
Yes, Minor0%
No1%


Levothyrox Comments and Questions

Add Your Comment

Comments to date: 1. Page 1 of 1.

Katherine   Grimes, CA 

6:01am on Monday, May 18th, 2009

I have experienced sudden and rapid hair loss. Dry brittle hair.
Will the hair come back once Levot... read more »

Add Your Comment


Ask Community about Levothyrox:

Questions to date: 2. Page 1 of 1.

VINCE ALFONZETTI   Melbourne 

10:05pm on Sunday, October 4th, 2009

I have been on a dosage of 175mcg for about 10 months and I am experiencing a variety of body pains, some anxiety attacks and at times still low in energy.
My main concern is the body pains and also loss of strength...could there be a problem with m...
read more »

Jo   arizona 

11:59pm on Tuesday, August 25th, 2009

My sister and I both have been presribed Levothyroxine 50 MCG (substitute for synthroid) yet my pill is a round tablet with JSP on one side and 514 on the other and hers is a oblong shaped tabled with M on one side and L 5 on the other. Why is this, ... read more »

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Levothyrox Side Effects reported on Patientsville.com


Levothyrox Side Effects Report #SELF149 -2008-09-12
LEVOTHYROX side effect was reported on 2008-09-12
Patient reported the following LEVOTHYROX side effects:"wieght gain, moodiness, poor sleep"Read more


Levothyrox Side Effects Report #SELF395 -2007-12-25
LEVOTHYROX side effect was reported on 2007-12-25
Patient reported the following LEVOTHYROX side effects:"massive weight gaind for they year that I took it. Constant head ache. Manic depression including paranoia and psychosis. Extremely dry skin and excema on the face. Hair loss, including eyelashes and brows. Very tired, yet unable to stay asleep all night. Super sensitive to cold and hot weather. Loose bowels. Memory loss. Loss of sex drive. High blood pressure and cholesterol. Very low pulse rate."Read more


Levothyrox Side Effects Report #SELF2443 -2009-02-24
LEVOTHYROX side effect was reported on 2009-02-24
Patient reported the following LEVOTHYROX side effects:"I was experiencing severe muscular pain, abdominal cramping, rash, hives, shortness of breath, and acute exhaustion. The pain through-out my body was shocking and I could not walk across the room. "Read more


Levothyrox Side Effects Report #SELF3772 -2009-06-15
LEVOTHYROX side effect was reported on 2009-06-15
Patient reported the following LEVOTHYROX side effects:"arthritis, fatigue, gain of weight, angina pectoris"Read more



Levothyrox Side Effects reported to FDA

Quick-Add Your Side Effect:

Levothyrox Side Effects Report #5216568-1
Health Professional from FRANCE reported Levothyrox side effect on Jan 10, 2007. Male patient, weighting 7.87 lb, was treated with Levothyrox. After drug was administered, patient experienced the following side effects: caesarean section, cardiac failure, delayed closure of cranial sutures, dysmorphism, echography abnormal, hypotonia neonatal, malignant hypertension, multiple congenital abnormalities. Levothyrox dosage: unknown. During the same period patient was treated with LODOZ, COTAREG. Patient recovered.



Levothyrox Side Effects Report #5286714-2
Levothyrox side effect was reported by a Consumer or non-health professional from FRANCE on Mar 15, 2007. Female patient, 26 years of age, was diagnosed with hypothyroidism and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: condition aggravated, cytomegalovirus antibody positive, face oedema, hepatic enzyme increased, hepatomegaly, hypersensitivity, hyperventilation, lymphadenopathy, pustular psoriasis. Levothyrox dosage: unknown. During the same period patient was treated with SALAZOPYRINE, SEROPLEX, LAMALINE, INDOCIN, PANOS. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #5286725-7
Consumer or non-health professional from FRANCE reported Levothyrox side effect on Mar 14, 2007. Female patient, 47 years of age, was diagnosed with thyroiditis, polyarthritis and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: gingival bleeding, neutropenia, white blood cell count decreased. Levothyrox dosage: unknown. During the same period patient was treated with MABTHERA, PREDNISONE, POLARAMINE, CLARADOL. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #5307653-4
Levothyrox side effect was reported by a Consumer or non-health professional from FRANCE on Apr 02, 2007. Female patient, 28 years of age, was diagnosed with hypothyroidism, oral contraception and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: acne cystic. Levothyrox dosage: unknown. During the same period patient was treated with CERAZETTE. Patient recovered.




Levothyrox Side Effects Report #5050682-9
Consumer or non-health professional from FRANCE reported Levothyrox side effect on June 28, 2006. Female patient, 79 years of age, was diagnosed with hypothyroidism and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: hypokalaemia, hyponatraemia. Levothyrox dosage: unknown. During the same period patient was treated with CYANOCOBALAMINE, PRACTAZIN, ZOCOR, RIVOTRIL, TIAPRIDAL. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #5065637-8
Levothyrox side effect was reported by a Consumer or non-health professional from FRANCE on Jan 11, 2006. Female patient, 53 years of age, was diagnosed with hypothyroidism, polycythaemia vera and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: acute coronary syndrome, malaise, myocardial infarction, ventricular fibrillation. Levothyrox dosage: unknown. During the same period patient was treated with INTRON A, ASPEGIC. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #5065638-X
Consumer or non-health professional from FRANCE reported Levothyrox side effect on Feb 14, 2006. Female patient, 72 years of age, was diagnosed with thyroidectomy and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: angioneurotic oedema, aphthous stomatitis, vomiting. Levothyrox dosage: (100 MG, 1 D) ORAL. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #5129272-5
Levothyrox side effect was reported by a Consumer or non-health professional from FRANCE on Sept 25, 2006. Female patient, 74 years of age, was treated with Levothyrox. After drug was administered, patient experienced the following side effects: abdominal pain upper, agitation, cardiovascular disorder, cerebral ischaemia, cholestasis, cough, cytolytic hepatitis, depression What is  depression, dyspnoea. Levothyrox dosage: unknown. During the same period patient was treated with LORAZEPAM, XELODA, AROMASINE, PLAVIX. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #5825163-2
Health Professional from FRANCE reported Levothyrox side effect on July 17, 2008. Male patient, 61 years of age, was diagnosed with hypertension and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: dehydration, gastroenteritis What is  gastroenteritis, renal failure acute. Levothyrox dosage: unknown. During the same period patient was treated with PERINDOPRIL ERBUMINE, MOPRAL, BURINEX, IMOVANE, PRAZEPAM, BISOPROLOL FUMARATE, PAROXETINE. Patient was hospitalized. Patient recovered.




Levothyrox Side Effects Report #4560582-6
Levothyrox side effect was reported by a Physician from on Jan 17, 2005. Female patient, 45 years of age, was diagnosed with hypothyroidism, hypercholesterolaemia and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: visual disturbance. Levothyrox dosage: unknown. During the same period patient was treated with LESCOL. Patient recovered.



Levothyrox Side Effects Report #4618135-7
Health Professional from reported Levothyrox side effect on Mar 03, 2005. Female patient, 61 years of age, was treated with Levothyrox. After drug was administered, patient experienced the following side effects: autoimmune thrombocytopenia, condition aggravated. Levothyrox dosage: unknown. During the same period patient was treated with DOXYCYCLINE, CLONIDINE, ARIMIDEX. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #4621505-4
Levothyrox side effect was reported by a Consumer or non-health professional from on Mar 18, 2005. Male patient, child 12 years of age, was treated with Levothyrox. After drug was administered, patient experienced the following side effects: acidosis, cardiac failure, cytolytic hepatitis, leukocytosis, neutrophil count increased, renal failure acute, respiratory distress. Levothyrox dosage: unknown. During the same period patient was treated with GENOTONORM. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #4635676-7
Consumer or non-health professional from reported Levothyrox side effect on Mar 30, 2005. Female patient, 65 years of age, was treated with Levothyrox. After drug was administered, patient experienced the following side effects: cardio-respiratory arrest, dialysis What is  dialysis, hyperkalaemia, renal failure acute. Levothyrox dosage: unknown. During the same period patient was treated with SOPROL, CORDARONE, PRAZOSIN, INEXIUM, ATARAX. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #4659391-9
Levothyrox side effect was reported by a Consumer or non-health professional from on Apr 21, 2005. Female patient, 65 years of age, was treated with Levothyrox. After drug was administered, patient experienced the following side effects: cardio-respiratory arrest, dialysis What is  dialysis, hyperkalaemia, renal failure acute. Levothyrox dosage: unknown. During the same period patient was treated with SOPROL, CORDARONE, PRAZOSIN, INEXIUM, ATARAX, CHLORIDE. Patient was hospitalized. Patient recovered.




Levothyrox Side Effects Report #4741477-1
Consumer or non-health professional from FRANCE reported Levothyrox side effect on July 18, 2005. Female patient, 81 years of age, was diagnosed with hypothyroidism, essential hypertension, pain What is  pain, dementia alzheimer's type and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: blood thyroid stimulating hormone increased, c-reactive protein increased, conjunctivitis, cough, dyspnoea, dyspnoea exertional, eosinophilia, haemoglobin decreased, pulmonary oedema. Levothyrox dosage: unknown. During the same period patient was treated with FUROSEMIDE, VOLTAREN, ARICEPT, EBIXA, LOXEN, DIFFU K, EQUANIL, IMOVANE. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #4741478-3
Levothyrox side effect was reported by a Consumer or non-health professional from FRANCE on July 26, 2005. Female patient, 23 years of age, was diagnosed with hepatitis c What is  hepatitis c and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: blood pressure diastolic decreased, cardiac murmur, endocarditis staphylococcal, epistaxis, fungal skin infection, ichthyosis, leukocytosis, lymphadenopathy, lymphopenia. Levothyrox dosage: unknown. During the same period patient was treated with RENAGEL, PEGASYS, COPEGUS, MOPRAL, HYDROCORTISONE, KAYEXALATE, CLARYTINE, DOLIPRANE. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #4761426-X
Consumer or non-health professional from FRANCE reported Levothyrox side effect on Aug 11, 2005. Male patient, 79 years of age, was treated with Levothyrox. After drug was administered, patient experienced the following side effects: cerebral haematoma, confusional state, international normalised ratio increased, prothrombin time prolonged. Levothyrox dosage: unknown. During the same period patient was treated with CIFLOX, PREVISCAN, COVERSYL, HALDOL, MOPRAL, CARDENSIEL, LORAZEPAM, LASILIX. Patient was hospitalized. Patient died.



Levothyrox Side Effects Report #4788923-5
Levothyrox side effect was reported by a Consumer or non-health professional from FRANCE on Sept 02, 2005. Female patient, 59 years of age, was diagnosed with hypothyroidism and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: cerebral ventricle dilatation, leukoencephalopathy, papilloedema, visual acuity reduced. Levothyrox dosage: unknown. During the same period patient was treated with MEDIATOR, VASTEN, TEMESTA, VASTAREL. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #4819835-6
Consumer or non-health professional from FRANCE reported Levothyrox side effect on Oct 13, 2005. Female patient, 81 years of age, was diagnosed with pneumonia What is  pneumonia, hypertensive cardiomyopathy and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: blood alkaline phosphatase increased, cardiac failure, cholestasis, cytolytic hepatitis, fall What is  fall, gamma-glutamyltransferase increased, malaise, pneumonia What is  pneumonia. Levothyrox dosage: unknown. During the same period patient was treated with BUFLOMEDIL, AUGMENTIN, IZILOX, CELECTOL, AMLOR, CALCIPARINE, INSULIN. Patient was hospitalized. Patient recovered.




Levothyrox Side Effects Report #4870294-7
Levothyrox side effect was reported by a Consumer or non-health professional from FRANCE on Dec 08, 2005. Female patient, 66 years of age, was treated with Levothyrox. After drug was administered, patient experienced the following side effects: breast cancer What is  breast cancer, dermatitis bullous, porphyria non-acute. Levothyrox dosage: unknown. During the same period patient was treated with SPAGULAX, ARIMIDEX, LEXOMIL. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #4883763-0
Health Professional from FRANCE reported Levothyrox side effect on Dec 29, 2005. Female patient, 81 years of age, was diagnosed with hypothyroidism, pneumonia What is  pneumonia, hypertensive cardiomyopathy and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: cardiac failure, cholestasis, cytolytic hepatitis, fall What is  fall, ischaemic cardiomyopathy, pneumonia What is  pneumonia. Levothyrox dosage: unknown. During the same period patient was treated with BUFLOMEDIL, AUGMENTIN, IZILOX, CELECTOL, AMLOR, CALCIPARINE, INSULIN. Patient was hospitalized. Patient died.



Levothyrox Side Effects Report #4883772-1
Levothyrox side effect was reported by a Consumer or non-health professional from FRANCE on Dec 26, 2005. Male patient, 56 years of age, was treated with Levothyrox. After drug was administered, patient experienced the following side effects: hypersensitivity. Levothyrox dosage: unknown. During the same period patient was treated with HYDROCORTISONE, CELEBREX, PANTESTONE, VOLTAREN, ALPRAZOLAM, TERCIAN, EFFEXOR, PLAVIX. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #4930396-3
Physician from FRANCE reported Levothyrox side effect on Feb 14, 2006. Female patient, 62 years of age, was diagnosed with hypothyroidism, depression What is  depression, hepatitis c What is  hepatitis c and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: atrial fibrillation What is  atrial fibrillation, supraventricular extrasystoles. Levothyrox dosage: unknown. During the same period patient was treated with SEROPLEX FILM, SEROPLEX FILM, PEGINTERFERON ALFA, RIBAVIRIN, ACETAMINOPHEN, ZOLPIDEM, CLOBAZAM, DOMPERIDONE. Patient recovered.



Levothyrox Side Effects Report #4998735-5
Levothyrox side effect was reported by a Health Professional from FRANCE on Mar 30, 2006. Female patient, 96 years of age, was treated with Levothyrox. After drug was administered, patient experienced the following side effects: anaemia, gastrointestinal haemorrhage. Levothyrox dosage: unknown. During the same period patient was treated with COUMADIN, ALDACTONE, FERROUS SULPHATE, LASIX. Patient was hospitalized. Patient recovered.




Levothyrox Side Effects Report #5027535-5
Consumer or non-health professional from FRANCE reported Levothyrox side effect on June 07, 2006. Female patient, 58 years of age, was diagnosed with nail tinea and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: monoparesis, musculoskeletal stiffness. Levothyrox dosage: unknown. During the same period patient was treated with LAMISIL. Patient recovered.



Levothyrox Side Effects Report #5029550-4
Levothyrox side effect was reported by a Consumer or non-health professional from FRANCE on June 16, 2006. Female patient, 81 years of age, weighting 172.0 lb, was diagnosed with hypothyroidism, dysthymic disorder, essential hypertension and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: anaemia, balance disorder, fall What is  fall, orthostatic hypotension. Levothyrox dosage: unknown. During the same period patient was treated with MOGADON, LAROXYL, RIVOTRIL, COTAREG. Patient was hospitalized. Patient recovered.



Levothyrox Side Effects Report #5038423-2
Consumer or non-health professional from FRANCE reported Levothyrox side effect on June 16, 2006. Female patient, 81 years of age, weighting 172.0 lb, was diagnosed with hypothyroidism, dysthymic disorder, essential hypertension and was treated with Levothyrox. After drug was administered, patient experienced the following side effects: anaemia, balance disorder, fall What is  fall, orthostatic hypotension. Levothyrox dosage: unknown. During the same period patient was treated with MOGADON, LAROXYL, RIVOTRIL, COTAREG. Patient was hospitalized. Patient recovered.





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