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Cant Sleep Properly (105)
Shortness Of Breath (32)
Loss Of Appetite (29)
Headache (20)
Nausea (19)
Weight Loss (17)
Weight Loss, Loss Of Appetite (15)
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Myonal Side Effects and Adverse Effects reported to US Food and Drug Administration (FDA)

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Face Oedema, Weight Increased, Urinary Retention (8475869-4)
on Jun 22, 2012 Female from JAPAN , 23 years of age, was treated with Myonal. Directly after, patient experienced the unwanted or unexpected Myonal side effects: face oedema, weight increased, urinary retention. Myonal dosage: 2 Tablets/day.
Associated medications used:
  • Celebrex (200 Mg, 1x/day)
  • Loxonin (2 Tapes/day)


Dermatitis Bullous (8296458-0)
Patient was taking Myonal. Patient felt the following Myonal side effects: dermatitis bullous on Apr 06, 2012 from JAPAN Additional patient health information: Male , 77 years of age, was diagnosed with
  • spinal osteoarthritis
and. Myonal dosage: Unk.
Multiple prescriptions taken:
  • Celebrex (100 Mg,uid/qd)
  • Celebrex (100 Mg, 2x/day)
  • Ketoprofen (Unk)
  • Rebamipide (Unk)


Malignant Peritoneal Neoplasm, Malignant Ascites, Malignant Pleural Effusion, Ovarian Cancer (8277679-X)
Adverse event was reported on Mar 29, 2012 by a Female taking Myonal (Dosage: N/A) was diagnosed with
  • muscle tightness
  • prophylaxis
  • rheumatoid arthritis
and. Location: JAPAN , weighting 97.00 lb, After Myonal was administered, patient encountered several Myonal side effects: malignant peritoneal neoplasm, malignant ascites, malignant pleural effusion, ovarian cancer.
Multiple concurrent drugs taken:
  • Selbex
  • Actemra
  • Loxonin
  • Bredinin
  • Infree
  • Isoniazid
  • Methycobal
Patient was hospitalized.

Jaundice (8188177-6)
on Feb 29, 2012 Female from JAPAN , 76 years of age, weighting 154.3 lb, was diagnosed with
  • back pain
  • type 2 diabetes mellitus
  • neurosis
and was treated with Myonal. Directly after, patient experienced the unwanted or unexpected Myonal side effects: jaundice. Myonal dosage: 50 Mg, 2x/day.
Associated medications used:
  • Alogliptin Benzoate (12.5 Mg, 1x/day)
  • Diazepam (5 Mg, 1x/day)
  • Lyrica (100 Mg, 1x/day)
  • Prednisolone (2 Mg, 2x/day)
  • Folic Acid (5 Mg, 1x/day)
  • Aspara K (600 Mg, 2x/day)
  • Uniphyl (100 Mg, 1x/day)
  • Rabeprazole Sodium (10 Mg, 1x/day)
Patient was hospitalized.


Purpura, Hypoglycaemia, Muscle Spasms (7901418-2)
on Oct 27, 2011 Patient from JAPAN , 81 years of age, weighting 152.1 lb, was treated with Myonal (epirizole Hydrochloride) (epirizole Hydrochloride). Patient felt the following Myonal side effects: purpura, hypoglycaemia, muscle spasms. Myonal (epirizole Hydrochloride) (epirizole Hydrochloride) dosage: N/A.
Multiple prescriptions taken:
  • Shakuyakukanzoutou (herbal Extract Nos) (granules) (herbal Extract Nos
  • Excelase (enzymes Nos) (tablet) (enzymes Nos)
  • Halfdigoxin (digoxin) (digoxin)
  • Protecadin (lafutidine) (tablet) (lafutidine)
  • Ubilon (tibolone) (tablet) (tibolone)
  • Cardenalin (doxazosin Mesilate) (doxazosin Mesilate)
  • Stronger Neo-minophagen C (cysteine, Aminoacetic Acid, Glycyrrhizic Ac
  • Magmitt (magnesium Oxide) (tablet) (magnesium Oxide)


Blood Pressure Systolic Increased, Cold Sweat, Hypoaesthesia, Cervical Spinal Stenosis, Blood Glucose Increased, Menopausal Symptoms, Cerebral Infarction, Hypoglycaemia, Hunger (7875449-5)
Patient was taking Myonal. After Myonal was administered, patient encountered several Myonal side effects: blood pressure systolic increased, cold sweat, hypoaesthesia, cervical spinal stenosis, blood glucose increased, menopausal symptoms, cerebral infarction, hypoglycaemia, hunger on Oct 19, 2011 from JAPAN Additional patient health information: Female , 71 years of age, was diagnosed with
  • spinal osteoarthritis
and. Myonal dosage: 3 Df, Unk.
Multiple concurrent drugs taken:
  • Sitagliptin Phosphate (25 Mg, Unk)
  • Amlodipine (2.5 Mg, Unk)
  • Magmitt (Unk)
  • Amaryl (0.5 Mg, Unk)
  • Methycobal (3 Df, Unk)
  • Crestor (2.5 Mg, Unk)
  • Kakkon-to (Unk)
  • Celecoxib (2 Df, Unk)
Patient was hospitalized.

Renal Failure (7795669-8)
Adverse event was reported on Sep 28, 2011 by a Male taking Myonal (Dosage: N/A) . Location: JAPAN , 23 years of age, Directly after, patient experienced the unwanted or unexpected Myonal side effects: renal failure. Patient was hospitalized.

Skin Exfoliation, Sensory Disturbance, Hyperkeratosis (7740650-8)
on Aug 31, 2011 Male from JAPAN , 42 years of age, weighting 183.0 lb, was diagnosed with
  • musculoskeletal stiffness
  • hypercholesterolaemia
  • hypertension
and was treated with Myonal. Patient felt the following Myonal side effects: skin exfoliation, sensory disturbance, hyperkeratosis. Myonal dosage: N/A.
Multiple prescriptions taken:
  • Zetia
  • Amlodipine (Dosage Is Uncertain During A Day)


Joint Dislocation (7688615-9)
on Aug 09, 2011 Male from JAPAN , 36 years of age, was diagnosed with
  • muscle spasms
and was treated with Myonal. After Myonal was administered, patient encountered several Myonal side effects: joint dislocation. Myonal dosage: 50 Mg, Tid.
Multiple concurrent drugs taken:
  • Botox (50 Units, Single)
  • Botox (50 Units, Single)


Joint Dislocation (7688615-9)
Patient was taking Myonal. Directly after, patient experienced the unwanted or unexpected Myonal side effects: joint dislocation on Aug 09, 2011 from JAPAN Additional patient health information: Male , 36 years of age, was diagnosed with
  • muscle spasms
and. Myonal dosage: 50 Mg, Tid.
Associated medications used:
  • Botox (50 Units, Single)
  • Botox (50 Units, Single)


Coagulopathy, Erythema Multiforme, Aphthous Stomatitis, Hepatic Function Abnormal, Skin Ulcer (7612761-9)
Adverse event was reported on Jun 27, 2011 by a Male taking Myonal (eperisone Hydrochloride) (Dosage: 50 Mg, Tid, Po) was diagnosed with
  • malignant glioma
and. Location: JAPAN , 17 years of age, weighting 106.9 lb, Patient felt the following Myonal side effects: coagulopathy, erythema multiforme, aphthous stomatitis, hepatic function abnormal, skin ulcer.
Multiple prescriptions taken:
  • Loxonin (loxoprofen Sodium Hydrate) (loxoprofen Sodium) (60 Mg, Prn, Po)
  • Ubretid (distigmine Bromide) (5 Mg, Qd, Po)
  • Primperan Tab (10 Mg, Qd, Iv)
  • Mucosta (rebamipide) (100 Mg, Prn, Po)
  • Zolpidem Tartrate (5 Mg, Qd, Po)
  • Magmitt (magnesium Oxide) (330 Mg, Tid, Po)
  • Fentanyl Citrate (Iv)
  • Famotidine (10 Mg, Bid, Po)
Patient was hospitalized.

Hypoglycaemia (7590804-9)
on Jun 21, 2011 Male from JAPAN , 76 years of age, was treated with Myonal. After Myonal was administered, patient encountered several Myonal side effects: hypoglycaemia. Myonal dosage: N/A.
Multiple concurrent drugs taken:
  • Loxonin
  • Methycobal
  • Amlodipine (2.5 Mg, Unk)


Hepatic Function Abnormal, White Blood Cell Count Increased, Pyrexia (7575434-7)
on Jun 16, 2011 Female from JAPAN , 39 years of age, weighting 127.9 lb, was diagnosed with
  • cervicobrachial syndrome
and was treated with Myonal. Directly after, patient experienced the unwanted or unexpected Myonal side effects: hepatic function abnormal, white blood cell count increased, pyrexia. Myonal dosage: 50 Mg, 2x/day.
Associated medications used:
  • Mucosta (100 Mg, 2x/day)
  • Celecoxib (100 Mg, 2x/day)
Patient was hospitalized.

Somnolence, Intraocular Pressure Increased (7557089-0)
Patient was taking Myonal. Patient felt the following Myonal side effects: somnolence, intraocular pressure increased on Jun 16, 2011 from JAPAN Additional patient health information: Female , 68 years of age, . Myonal dosage: N/A.
Multiple prescriptions taken:
  • Neurotropin
  • Lyrica (75mg Daily)
  • Loxonin (Unk)
  • Mucosta


Hypoglycaemia (7540173-5)
Adverse event was reported on May 31, 2011 by a Male taking Myonal (Dosage: N/A) . Location: JAPAN , 76 years of age, After Myonal was administered, patient encountered several Myonal side effects: hypoglycaemia.
Multiple concurrent drugs taken:
  • Methycobal
  • Amlodipine (2.5 Mg, Unk)
  • Loxonin


Syncope, Palpitations, Vomiting, Cold Sweat, Abdominal Pain (7325594-8)
on Feb 25, 2011 Male from JAPAN , 64 years of age, was treated with Myonal. Directly after, patient experienced the unwanted or unexpected Myonal side effects: syncope, palpitations, vomiting, cold sweat, abdominal pain. Myonal dosage: N/A.
Associated medications used:
  • Loxonin
  • Aspirin
  • Amaryl
  • Valsartan
  • Amlodipine Besilate
  • Allegra


Respiratory Tract Oedema (7307352-3)
on Feb 15, 2011 Female from JAPAN , 54 years of age, weighting 101.4 lb, was diagnosed with
  • musculoskeletal pain
  • abdominal pain upper
and was treated with Myonal. Patient felt the following Myonal side effects: respiratory tract oedema. Myonal dosage: Unk.
Multiple prescriptions taken:
  • Selbex (Unk)
  • Celecox (200 Mg)
  • Gasmotin (5 Mg, 3x/day)
  • Pravastatin Sodium (Unk)
  • Isodine (Unk)
  • Celecox (200 Mg, Unk)
  • Influenza Virus Vaccine Polyvalent (Unk)
  • Acinon (Unk)
Patient was hospitalized.

Muscular Weakness, Pneumonia Aspiration, Increased Viscosity Of Bronchial Secretion (7273617-7)
Patient was taking Myonal. After Myonal was administered, patient encountered several Myonal side effects: muscular weakness, pneumonia aspiration, increased viscosity of bronchial secretion on Jan 28, 2011 from JAPAN Additional patient health information: Male , child 4 years of age, weighting 22.05 lb, was diagnosed with
  • epilepsy
and. Myonal dosage: 14 Mg, Unk.
Multiple concurrent drugs taken:
  • Phenobal (12 Mg, Qd)
  • Rivotril (0.25 Mg, Qd)
  • Periactin (1.5 Mg, Qd)
  • Botox (60 Units, Single)
  • Asverin (30 Mg, Qd)
  • Diapp (4 Mg, Qd)
  • Botox (70 Units, Single)
  • Botox (40 Units, Single)
Patient was hospitalized.

Chronic Obstructive Pulmonary Disease (7234106-9)
Adverse event was reported on Jan 11, 2011 by a Male taking Myonal (Dosage: N/A) was diagnosed with
  • headache
and. Location: JAPAN , weighting 143.3 lb, Directly after, patient experienced the unwanted or unexpected Myonal side effects: chronic obstructive pulmonary disease.
Associated medications used:
  • Loxonin
  • Symbicort (160/4.5 Ug Two Inhalation Two Times A Day)
  • Sultanol
  • Kenalog
  • Diovan
  • Mucosta
  • Spiriva
  • Calonal
Patient was hospitalized.

Abdominal Pain Upper, Epilepsy, Insomnia (5602695-3)
on Jan 15, 2008 Female from JAPAN , weighting 126.3 lb, was diagnosed with
  • back pain
  • depression
  • lacunar infarction
and was treated with Myonal. Patient felt the following Myonal side effects: abdominal pain upper, epilepsy, insomnia. Myonal dosage: 100 Mg.
Multiple prescriptions taken:
  • Hi-z (50 Mg)
  • Clopidogrel (50 Mg)
  • Clopidogrel (50 Mg)
  • Clopidogrel (25 Mg)


Abdominal Pain Upper, Epilepsy, Insomnia (5352589-6)
on Jun 06, 2007 Female from JAPAN , weighting 126.3 lb, was treated with Myonal. After Myonal was administered, patient encountered several Myonal side effects: abdominal pain upper, epilepsy, insomnia. Myonal dosage: 100 Mg.
Multiple concurrent drugs taken:
  • Hi-z (50 Mg)
  • Clopidogrel (50 Mg)
  • Clopidogrel (50 Mg)
  • Clopidogrel (25 Mg)


Colonic Haemorrhage, Diverticulum Intestinal (4599743-9)
Patient was taking Myonal. Directly after, patient experienced the unwanted or unexpected Myonal side effects: colonic haemorrhage, diverticulum intestinal on Feb 21, 2005 from Additional patient health information: Female , weighting 136.7 lb, was diagnosed with
  • ill-defined disorder
  • hypertension
and. Myonal dosage: N/A.
Associated medications used:
  • Coversyl (Daily Dose: 4 Milligram(s))
  • Herbesser (Daily Dose: 60 Milligram(s))
  • Gasmotin
  • Mm
  • Soleton (Daily Dose: 240 Milligram(s))
  • Depas
  • Halcion
  • Gasnyne
Patient was hospitalized.

Myonal Health Episodes

How Can Myonal Affect You?

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Most drugs have a large list of nonsevere or mild adverse effects which do not rule out continued usage. These effects depend on individual sensitivity, and can include nausea, dizziness, diarrhea, malaise, vomiting, headache, dermatitis, dry mouth, etc. Check commonly reported side effects . These can be considered a form of pseudo-allergic reaction, as not all users experience these effects; many users experience none at all.

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.

Myonal Information

More About Myonal

Side Effects reported to FDA: 22. View Myonal Adverse Reports

Myonal safety alerts: No

Reported deaths: 1

Reported hospitalizations: 9

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