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Thyroid Side Effects

Common Thyroid Side Effects


The most commonly reported Thyroid side effects (click to view or check a box to report):

Fatigue (47)
Hypothyroidism (38)
Alopecia (37)
Product Formulation Issue (23)
Headache (23)
Palpitations (22)
Dizziness (21)
Diarrhoea (21)
Dyspnoea (21)
Feeling Abnormal (21)
Product Substitution Issue (20)
Chest Pain (20)
Pain (20)
Asthenia (19)
Weight Increased (19)
Product Quality Issue (18)
Blood Thyroid Stimulating Hormone Increased (17)
Depression (17)
Heart Rate Increased (17)
Insomnia (17)

➢ More



If you or someone in your family has experienced a serious side effect to a health product, you are encouraged to report the experience to your health care professional (e.g. physician, pharmacist). You could also complete a copy of the side effect reporting form or report your side effect to FDA.

Side effects reports are analyzed to discover potential health product safety signals. Some important reactions may take an extremely long time to develop or occur infrequently. Continued monitoring of adverse reactions is thus essential to maintain a comprehensive safety and effectiveness profile of health products.

Thyroid Side Effects Reported to FDA

The following Thyroid reports list potential signals of serious risks and new safety information that were identified using the FDA Adverse Event Reporting System (FAERS).
FAERS is a database that contains information on adverse event and medication errors reports submitted to FDA by healthcare professionals (such as physicians, pharmacists, nurses and others), consumers (such as patients, family members, layers and others) and manufacturers.


The appearance of Thyroid on this list does not mean that FDA has concluded that the drug has the listed risk. It means that FDA has identified a potential safety issue, but it does not mean that FDA has found a causal relationship between the drug and the listed risk.
Muscular Weakness, Myalgia, Paralysis, Viral Infection, Myopathy Endocrine
This is a report of a 41-year-old female patient (weight: NA) from US, suffering from the following symptoms/conditions: hypothyroidism, who was treated with Thyroid, Porcine (dosage: 1 Pill Daily Po, start time: Jun 01, 2009), combined with: NA. and developed a serious reaction and side effect(s). The consumer presented with:
  • Muscular Weakness
  • Myalgia
  • Paralysis
  • Viral Infection
  • Myopathy Endocrine
which developed after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Thyroid, Porcine treatment in female patients, resulting in muscular weakness side effect. The patient was hospitalized.

Dermatitis Herpetiformis, Blister
This report suggests a potential Thyroid Dermatitis Herpetiformis, Blister side effect(s) that can have serious consequences. A 53-year-old female patient (weight: NA) from US was diagnosed with the following symptoms/conditions: NA and used Thyroid (dosage: 1 Tablet Daily Po) starting Sep 02, 2012. Soon after starting Thyroid the patient began experiencing various side effects, including:
  • Dermatitis Herpetiformis
  • Blister
Drugs used concurrently: NA. Although Thyroid demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as dermatitis herpetiformis, may still occur.

No Adverse Event
This No Adverse Event problem was reported by a health professional from US. A 74-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: hypothyroidism. On NS this consumer started treatment with Thyroid (dosage: NA). The following drugs were being taken at the same time: NA. When commencing Thyroid, the patient experienced the following unwanted symptoms/side effects:
  • No Adverse Event
Although all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as no adverse event, may become evident only after a product is in use by the general population.

Hallucination, Psychotic Disorder
This is a report of a 63-year-old male patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Thyroid Tab (dosage: NA) starting Apr 01, 2012. Concurrently used drugs:
  • Carbamazepine
  • Tamsulosin Hcl
  • Ampyra (10 Mg, Bid, Oral)
  • Sertraline Hydrochloride
Soon after that, the consumer experienced the following side effects:
  • Hallucination
  • Psychotic Disorder
This opens a possibility that Thyroid Tab treatment could cause the above reactions, including hallucination, and some male subjects may be more susceptible.


Deep Vein Thrombosis
A 75-year-old female patient (weight: NA) from UNITED STATES with the following symptoms/conditions: NA started Thyroid Tab treatment (dosage: NA) on Sep 01, 2011. Soon after starting Thyroid Tab treatment, the subject experienced various side effects, including:
  • Deep Vein Thrombosis
Concurrently used drugs:
  • Acyclovir
  • Calcium Carbonate
  • Fish Oil (fish Oil)
  • Hydrocodone Bitartrate
  • Aspirin
  • Miralax
  • Revlimid (5 Mg, 1 In 1 D, Po)
This finding indicates that some female patients could be more vulnerable to Thyroid Tab.

Constipation, Fatigue, Alopecia, Blood Thyroid Stimulating Hormone Increased
A female patient from UNITED STATES (weight: NA) experienced symptoms, such as: hypothyroidism,migraine and was treated with Thyroid Tab(dosage: 60-90 Mg Daily). The treatment was initiated on Feb 16, 2011. After that a consumer reported the following side effect(s):
  • Constipation
  • Fatigue
  • Alopecia
  • Blood Thyroid Stimulating Hormone Increased
Concurrently used drugs, which potentially could have contributed to side effect(s) or affected Thyroid Tab efficacy:
  • Imitrex (As Needed)
  • M.v.i.
  • Albuterol (As Needed)
  • Fish Oil
  • Calcium
  • Losartan


Limb Asymmetry, Atypical Femur Fracture, Fracture Displacement, Groin Pain, Stress Fracture, Intervertebral Disc Protrusion, Pulmonary Embolism, Fall, Deep Vein Thrombosis
In this report, Thyroid Tab was administered for the following condition: NA.A 66-year-old female consumer from UNITED STATES (weight: NA) started Thyroid Tab treatment (dosage: NA) on NS.Sometime after starting the treatment, the patient complained of the following side effect(s):
  • Limb Asymmetry
  • Atypical Femur Fracture
  • Fracture Displacement
  • Groin Pain
  • Stress Fracture
  • Intervertebral Disc Protrusion
  • Pulmonary Embolism
  • Fall
  • Deep Vein Thrombosis
A possible interaction with other drugs could have contributed to this reaction:
  • Actonel
  • Aspirin
  • Verapamil
  • Vitamin D
  • Vitamin E
Establishing a causal relationship between a specific drug and consumer's side effects is complex, but it is possible that in this report Thyroid Tab treatment could be related to the listed above side effect(s).

Off Label Use, Bronchitis, Cough
This is a report of the following Thyroid Pill side effect(s):
  • Off Label Use
  • Bronchitis
  • Cough
A 83-year-old female patient from UNITED STATES (weight: NA) presented with the following condition: NA and received a treatment with Thyroid Pill (dosage: NA) starting: NS.The following concurrently used drugs could have generated interactions:
  • Acid Reflux Pill
  • Paxil
  • Atenolol
  • Symbicort (80/4.5 Mcg, 2 Puffs, Two Times A Day)
  • Vitamin Tab
This report suggests that a Thyroid Pill treatment could be associated with the listed above side effect(s).

Malaise, Dyspnoea, Off Label Use
This Thyroid Pill report was submitted by a 72-year-old female consumer from UNITED STATES (weight: NA). The patient was diagnosed with: NA and Thyroid Pill was administered (dosage: NA) starting: Jan 01, 2005. The consumer developed a set of symptoms:
  • Malaise
  • Dyspnoea
  • Off Label Use
Other drugs used simultaneously:
  • Xotnex Haf
  • Pulmicort Flexhaler (180 Mcg Two Puffs Two Times A Day)
  • Lipitor
  • Pulmicort Flexhaler (180 Mcg One Puff Daily)
Those unexpected symptoms could be linked to a Thyroid Pill treatment, however establishing a potential drug-safety problem requires a more detailed clinical analysis.

Hypoxia, Breast Cancer In Situ, Fibrosis, Fatigue, Exercise Tolerance Decreased, Atrial Septal Defect
This is a report of a possible correlation between Thyroid Tab use and the following symptoms/side effect(s):
  • Hypoxia
  • Breast Cancer In Situ
  • Fibrosis
  • Fatigue
  • Exercise Tolerance Decreased
  • Atrial Septal Defect
which could contribute to an assessment of Thyroid Tab risk profile.A 42-year-old female consumer from UNITED STATES (weight: NA) was suffering from NA and was treated with Thyroid Tab (dosage: NA) starting NS.Other concurrent medications:
  • Mustargen
  • Lexapro (escitalopram Ocalate)
  • Calcium/vitamin D (lekovit Ca)
  • Levothyroxine Sodium


Heart Rate Increased, Feeling Abnormal, Thinking Abnormal, Alopecia, Dry Skin, Contusion, Condition Aggravated, Blood Thyroid Stimulating Hormone Increased, Heart Rate Irregular
A 73-year-old female patient from UNITED STATES (weight: NA) presented with the following symptoms: NA and after a treatment with Thyroid Tab (dosage: 90 Mg, Unk) experienced the following side effect(s):
  • Heart Rate Increased
  • Feeling Abnormal
  • Thinking Abnormal
  • Alopecia
  • Dry Skin
  • Contusion
  • Condition Aggravated
  • Blood Thyroid Stimulating Hormone Increased
  • Heart Rate Irregular
The treatment was started on Nov 01, 2011. Thyroid Tab was used in combination with the following drugs: NA.This report could alert potential Thyroid Tab consumers.

Blood Pressure Increased, Insomnia, Palpitations, Thyroid Function Test Abnormal, Hyperhidrosis, Hot Flush
In this report, a 65-year-old female patient from UNITED STATES (weight: NA) was affected by a possible Thyroid Tab side effect.The patient was diagnosed with NA. After a treatment with Thyroid Tab (dosage: 60 Mg, start date: Jan 01, 2009), the patient experienced the following side effect(s):
  • Blood Pressure Increased
  • Insomnia
  • Palpitations
  • Thyroid Function Test Abnormal
  • Hyperhidrosis
  • Hot Flush
The following simultaneously used drugs could have led to this reaction:
  • Simvastatin
The findings here stress that side effects should be taken into consideration when evaluating a Thyroid Tab treatment.

Visual Impairment, Malaise, Eyelid Ptosis, Headache, Pain, Abdominal Discomfort, Diarrhoea, Diplopia
This is a report of a female patient from UNITED STATES (weight: NA), who used Thyroid Tab (dosage: Unk) for a treatment of hypothyroidism,anxiety,panic attack. After starting a treatment on Oct 01, 2010, the patient experienced the following side effect(s):
  • Visual Impairment
  • Malaise
  • Eyelid Ptosis
  • Headache
  • Pain
  • Abdominal Discomfort
  • Diarrhoea
  • Diplopia
The following drugs could possibly have interacted with the Thyroid Tab treatment
  • Alprazolam (0.5 Mg, As Needed)
  • Alprazolam
Taken together, these observations suggest that a Thyroid Tab treatment could be related to side effect(s), such as Visual Impairment, Malaise, Eyelid Ptosis, Headache, Pain, Abdominal Discomfort, Diarrhoea, Diplopia.

Abdominal Discomfort, Diarrhoea
This abdominal discomfort side effect was reported by a consumer or non-health professional from UNITED STATES. A 80-year-old female patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Thyroid (dosage: NA), which was started on May 13, 2012. Concurrently used drugs:
  • Vitamins Nos
  • Naproxen Sodium (Prn)
When starting to take Thyroid the consumer reported the following symptoms:
  • Abdominal Discomfort
  • Diarrhoea
These side effects may potentially be related to Thyroid.

Thyroid Neoplasm, Dysphagia, Blood Thyroid Stimulating Hormone Increased
This is a Thyroid Tab side effect report of a 32-year-old female patient (weight:NA) from UNITED STATES, suffering from the following symptoms/conditions: NA, who was treated with Thyroid Tab (dosage:15 Mg, start time: Feb 02, 2012), combined with: NA., and developed a serious reaction and a thyroid neoplasm side effect. The patient presented with:
  • Thyroid Neoplasm
  • Dysphagia
  • Blood Thyroid Stimulating Hormone Increased
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Thyroid Tab treatment in female patients suffering from NA, resulting in thyroid neoplasm.

Gallbladder Disorder, Autoimmune Thyroiditis, Weight Decreased, Depression, Back Disorder, Decreased Appetite, Blood Cholesterol Increased, Joint Range Of Motion Decreased, Alopecia
This report suggests a potential Thyroid Tab gallbladder disorder side effect(s) that can have serious consequences. A female patient from UNITED STATES (weight:NA) was diagnosed with the following health condition(s): thyroid disorder and used Thyroid Tab (dosage: Unk) starting May 03, 2012. Soon after starting Thyroid Tab the patient began experiencing various side effects, including:
  • Gallbladder Disorder
  • Autoimmune Thyroiditis
  • Weight Decreased
  • Depression
  • Back Disorder
  • Decreased Appetite
  • Blood Cholesterol Increased
  • Joint Range Of Motion Decreased
  • Alopecia
Drugs used concurrently:
  • Effexor (Unk)
  • Zyprexa (5 Mg, Daily)
  • Effexor (75 Mg, Daily)
  • Pristiq (Unk)
  • Prozac (10 Mg, Daily)
  • Effexor (50 Mg, Daily)
  • Clonazepam (0.5 Mg One In Morning And Two At Night, 2x/day)
  • Cozaar (50 Mg, Daily)
The patient was hospitalized. Although Thyroid Tab demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as gallbladder disorder, may still occur.

White Blood Cell Count Decreased, Platelet Count Decreased
This white blood cell count decreased problem was reported by a physician from UNITED STATES. A 71-year-old female patient (weight: NA) was diagnosed with the following medical condition(s): NA.On Aug 05, 2011 a consumer started treatment with Thyroid Tab (dosage: NA). The following drugs/medications were being taken at the same time:
  • Prilosec
  • Cranberry (cranberry Berco)
  • Multivitamin
  • Benicar Hct
  • Femara
  • Neurontin
  • Revlimid (25 Mg, Daily X21 Days, Po ; 25 Mg, Daily X21 Days, Po ; 10 Mg, 1 In 1 D, Po)
  • Revlimid (25 Mg, Daily X21 Days, Po ; 25 Mg, Daily X21 Days, Po ; 10 Mg, 1 In 1 D, Po)
When commencing Thyroid Tab, the patient experienced the following unwanted symptoms /side effects:
  • White Blood Cell Count Decreased
  • Platelet Count Decreased
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as white blood cell count decreased, may become evident only after a product is in use by the general population.

Gastrointestinal Disorder, Urticaria, Weight Decreased
This is a Thyroid Preparation side effect report of a female patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Thyroid Preparation (dosage: NA) starting Dec 01, 2010. Concurrently used drugs:
  • Cyclobenzaprine
  • Lorazepam
Soon after that, the consumer experienced the following of symptoms:
  • Gastrointestinal Disorder
  • Urticaria
  • Weight Decreased
This opens a possibility that Thyroid Preparation could cause gastrointestinal disorder and that some female patients may be more susceptible.

Malaise, Heart Rate Increased, Blood Pressure Increased, Dyspnoea
A male patient (weight: NA) from UNITED STATES with the following symptoms: hypothyroidism,sleep apnoea syndrome started Thyroid Tab treatment (dosage: NA) on Aug 18, 2010. Soon after starting Thyroid Tab treatment, the consumer experienced several side effects, including:
  • Malaise
  • Heart Rate Increased
  • Blood Pressure Increased
  • Dyspnoea
. Concurrently used drugs:
  • Nuvigil (150 Milligram;)
This finding indicates that some patients can be more vulnerable to developing Thyroid Tab side effects, such as malaise.

Fatigue, Migraine, Gastric Disorder, Depressed Mood, Autoimmune Thyroiditis, Fibromyalgia, Irritable Bowel Syndrome, Rash, Erythema
This fatigue side effect was reported by a consumer or non-health professional from UNITED STATES. A 64-year-old female patient (weight:NA) experienced the following symptoms/conditions: NA.The patient was prescribed Thyroid (dosage: Unk), which was started on NS. Concurrently used drugs:
  • Excedrin Extra Strength Tablets (2 Df, Prn)
.When starting to take Thyroid the consumer reported symptoms, such as:
  • Fatigue
  • Migraine
  • Gastric Disorder
  • Depressed Mood
  • Autoimmune Thyroiditis
  • Fibromyalgia
  • Irritable Bowel Syndrome
  • Rash
  • Erythema
These side effects may potentially be related to Thyroid.

Unevaluable Event
This is a report of a male patient (weight: NA) from UNITED STATES, suffering from the following symptoms/conditions: thyroid disorder,fatigue,agitation, who was treated with Thyroid Tab (dosage: NA, start time: Jan 01, 2008), combined with:
  • Nuvigil (125 Milligram;)
  • Alprazolam
and developed a serious reaction and side effect(s). The consumer presented with:
  • Unevaluable Event
which developed after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Thyroid Tab treatment in male patients, resulting in unevaluable event side effect.

Cerebrovascular Accident, Injury
This report suggests a potential Thyroid Cerebrovascular Accident, Injury side effect(s) that can have serious consequences. A 39-year-old female patient (weight: NA) from UNITED STATES was diagnosed with the following symptoms/conditions: NA and used Thyroid (dosage: 2 Grains) starting Feb 20, 2007. Soon after starting Thyroid the patient began experiencing various side effects, including:
  • Cerebrovascular Accident
  • Injury
Drugs used concurrently:
  • Metformin Hcl (500 Mg, Qd)
  • Adderall 5 (20 Mg, Unk)
  • Glucophage (500 Mg, Bid)
  • Inderal
  • Yasmin (Unk)
  • Zoloft (1 ? Tablets)
  • Hydrochlorothiazide (12.5 Mg, Qd)
  • Thyroid Tab (120 Mg, Unk)
The patient was hospitalized. Although Thyroid demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as cerebrovascular accident, may still occur.

Dyspnoea, Fatigue, Headache, Hunger, Burning Sensation
This Dyspnoea, Fatigue, Headache, Hunger, Burning Sensation problem was reported by a consumer or non-health professional from UNITED STATES. A 30-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On May 13, 2011 this consumer started treatment with Thyroid Tab (dosage: NA). The following drugs were being taken at the same time:
  • Gilenya (0.5 Mg, Daily, Oral)
When commencing Thyroid Tab, the patient experienced the following unwanted symptoms/side effects:
  • Dyspnoea
  • Fatigue
  • Headache
  • Hunger
  • Burning Sensation
Although all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as dyspnoea, may become evident only after a product is in use by the general population.

Dyspnoea, Palpitations, Hypothyroidism, Feeling Abnormal, Dizziness, Suicidal Ideation
This is a report of a 85-year-old female patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Thyroid Tab (dosage: 30 Mg) starting Apr 01, 2012. Concurrently used drugs: NA.Soon after that, the consumer experienced the following side effects:
  • Dyspnoea
  • Palpitations
  • Hypothyroidism
  • Feeling Abnormal
  • Dizziness
  • Suicidal Ideation
This opens a possibility that Thyroid Tab treatment could cause the above reactions, including dyspnoea, and some female subjects may be more susceptible.

Cerebrovascular Accident
A female patient (weight: NA) from UNITED STATES with the following symptoms/conditions: thyroid disorder started Thyroid treatment (dosage: Unk 2x/day) on NS. Soon after starting Thyroid treatment, the subject experienced various side effects, including:
  • Cerebrovascular Accident
Concurrently used drugs:
  • Acetylsalicylic Acid (81 Mg,daily)
  • Preparation H Hemorrhoidal Suppositories (Unk As Needed)
The patient was hospitalized. This finding indicates that some female patients could be more vulnerable to Thyroid.

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Keep Track of Side Effects

Note Your Observations

It is really important to keep of your symptoms, right from the time you start a new medicine. You can do it any way you prefer: in a notebook, in a computer file or using our online tool. You should also note down any other medicines you are taking at the same time, because there could be an interaction between these medicines.

Why Your Notes are Important

Your notes could be helpful in several ways:

  • You can use them to remind you of details that may alert your health care professional(s) to a problem
  • You will have a record to refer to in the future, in case you are ever prescribed the same medicine again

  • Log Form

    You can use the following log form to write down important information, like the date and time you experienced a side effect and your symptoms, how strong the symptoms were, and any other medicines you were using.

    Medicine Name and Dosage:
    Side Effects Scale Date & Time Other Medicine(s) or Treatment(s)
    Scale: 1 = very mild to 10 = very bad

    You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


    Discuss Thyroid Side Effects

    Did You Have a Thyroid Side Effect?

    Yes, Severe
    Yes, Moderate
    Yes, Minor
    No

    How Effective is Thyroid for You?

    Exceeded Expectations
    Effective
    Somewhat Effective
    Not Effective

    Thyroid Safety Alerts, Active Ingredients, Usage Information

    NDC0456-0457
    TypeHUMAN PRESCRIPTION DRUG
    Proprietary NameArmour Thyroid THYROID, PORCINE
    NameTABLET
    Dosage FormORAL
    Route19960401
    On market sinceForest Laboratories, Inc
    LabelerTHYROID, PORCINE
    Active Ingredient(s)15
    Strength(s)mg/1
    Unit(s)
    Pharma Class

    More About Thyroid

    Side Effects reported to FDA: 373

    Thyroid safety alerts: 2011

    Reported deaths: 4

    Reported hospitalizations: 72

    Victoza (liraglutide [rDNA origin]) Injection: REMS - Risk of Thyroid C-cell Tumors, Acute Pancreatitis

    [Posted 06/13/2011]

    AUDIENCE: Endocrinology, Family Practice

    ISSUE: Novo Nordisk reminded healthcare professionals of important safety information about Victoza (liraglutide [rDNA origin]) injection required in a Risk Evaluation and Mitigation Strategy (REMS). The letter is being sent because a recent assessment of healthcare providers showed that some primary care providers are not fully aware of the serious risks associated with the use of Victoza.

    Liraglutide causes dose-dependent and treatment-duration-dependent thyroid C-cell tumors at clinically relevant exposures in both genders of rats and mice. It is unknown whether Victoza causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans, as human relevance could not be ruled out by clinical or nonclinical studies. Additionally, in clinical trials studying Victoza, there were more cases of pancreatitis in patients treated with Victoza than in patients treated with comparators.

    BACKGROUND: FDA may require a REMS for newly or already approved prescription drug product when FDA determines that a REMS is necessary to ensure the benefits of a drug outweigh the risks of the drug. Victoza is indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus.

    RECOMMENDATION: Patients with thyroid nodules noted on physical examination or neck imaging obtained for other reasons should be referred to an endocrinologist for further evaluation. Although routine monitoring of serum calcitonin is of uncertain value in patients treated with Victoza, if serum calcitonin is measured and found to be elevated, the patient should be referred to an endocrinologist for further evaluation.

    After initiation of Victoza, and after dose increases, observe patients carefully for signs and symptoms of pancreatitis (including persistent severe abdominal pain, sometimes radiating to the back, and which may or may not be accompanied by vomiting).

    Healthcare professionals and patients are encouraged to report adverse events, side effects, or product quality problems related to the use of these products to the FDA's MedWatch Safety Information and Adverse Event Reporting Program:

    • Complete and submit the report Online: www.fda.gov/MedWatch/report.htm
    • Download form or call 1-800-332-1088 to request a reporting form, then complete and return to the address on the pre-addressed form, or submit by fax to 1-800-FDA-0178


    [June 2011 - Dear Healthcare Professional Letter - Novo Nordisk]

    [May 2011 - Prescribing Information - Novo Nordisk]

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