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This is an index of adverse event reports related to Flexeril (Cyclobenzaprine). Click on the relevant link below to view a selection of reports according to the event's seriousness level and/or the nature of the adverse reaction. Or scroll down to view a sample of recent reports further on this page.
Our database includes reports from Jan 2007 to Dec 2007. The information is not vetted and should not be cosidered as verified clinical evidence.
All cases (51)
Cases resulting in a serious event (49)
Cases resulting in death (6)
Cases resulting in life threatening events (2)
Cases resulting in hospitalization (21)
Cases resulting in other serious reactions (28)
Below is a sample of adverse event reports reports related to Flexeril (Cyclobenzaprine). For a complete list and/or a specific selection of reports, please use the links in the index above.
Adverse event in 79 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-10-24
Patient: 79 year old female
Adverse reactions / side effects: Convulsion
Suspect drug(s):
Flexeril (Cyclobenzaprine)
Other drugs received by patient: Femara
Adverse event in 53 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a health professional (non-physician/pharmacist) from United States on 2007-10-24
Patient: 53 year old female
Adverse reactions / side effects: Overdose, Alcohol Poisoning
Suspect drug(s):
Alcohol (Ethanol)
Dosage: moderate amount
Indication: Drug USE FOR Unknown Indication
Flexeril
Dosage: four tablets (strength unspecified)
Indication: Back Pain
Start date: 2004-02-10
End date: 2004-02-10
Other drugs received by patient: Zoloft; Acetaminophen; Albuterol
Adverse event in 60 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-10-24
Patient: 60 year old female
Adverse reactions / side effects: Syncope, Incorrect Dose Administered
Suspect drug(s):
Flexeril
Dosage: 2.5 mg, 1 in 1 as necessary, oral ; 5 mg, 1 in 1 total, oral
Administration route: Oral
Indication: Back Pain
Start date: 2006-10-01
Flexeril
Dosage: 2.5 mg, 1 in 1 as necessary, oral ; 5 mg, 1 in 1 total, oral
Administration route: Oral
Indication: Back Pain
Start date: 2007-03-04
Adverse event in receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-10-24
Patient:
Adverse reactions / side effects: Hallucination
Suspect drug(s):
Flexeril (Cyclobenzaprine)
Adverse event in 46 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-10-24
Patient: 46 year old female
Adverse reactions / side effects: Ventricular Extrasystoles, Muscle Spasms
Suspect drug(s):
Flexeril (Cyclobenzaprine)
Other drugs received by patient: Effexor
Adverse event in female receiving Flexeril (Cyclobenzaprine)
Reported by a individual with unspecified qualification from United States on 2007-10-24
Patient: female
Adverse reactions / side effects: Anxiety, Pain in Extremity, Sensation of Heaviness, Coordination Abnormal, Muscle Spasms
Suspect drug(s):
Flexeril (Cyclobenzaprine)
Adverse event in 76 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-10-24
Patient: 76 year old female
Adverse reactions / side effects: Confusional State
Suspect drug(s):
Flexeril (Cyclobenzaprine)
Other drugs received by patient: Celexa; Other Unspecified Medications (All Other Therapeutic Products)
Adverse event in 35 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a health professional (non-physician/pharmacist) from United States on 2007-10-24
Patient: 35 year old female
Adverse reactions / side effects: Confusional State
Adverse event resulted in: life threatening event, hospitalization
Suspect drug(s):
Duragesic-100
Indication: Pain
Flexeril
Dosage: oral
Administration route: Oral
Indication: Drug USE FOR Unknown Indication
Oxycodone HCL
Indication: Drug USE FOR Unknown Indication
Phenergan
Indication: Drug USE FOR Unknown Indication
Xanax
Indication: Drug USE FOR Unknown Indication
Other drugs received by patient: Vivelle; Levothyroxine Sodium; Vorinostat (Antineoplastic Agents) Capsule; Idarubicin HCL (Idarubicin)
Adverse event in female receiving Flexeril (Cyclobenzaprine)
Reported by a physician from United States on 2007-10-23
Patient: female
Adverse reactions / side effects: Pain, NO Therapeutic Response
Suspect drug(s):
Flexeril (Cyclobenzaprine)
Adverse event in 54 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a pharmacist from United States on 2007-10-19
Patient: 54 year old female
Adverse reactions / side effects: Creutzfeldt-Jakob Disease
Suspect drug(s):
Adenosine Triphosphate Plus Ascorbic Acid Plus Calcium
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Calcium
Administration route: Oral
Indication: Drug USE FOR Unknown Indication
Celebrex
Administration route: Oral
Indication: Drug USE FOR Unknown Indication
Daypro
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Dong Quai
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Estradiol
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Evening Primrose OIL
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Flexeril
Administration route: Oral
Indication: Drug USE FOR Unknown Indication
Garlic
Indication: Drug USE FOR Unknown Indication
Horse Tail
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Magnesium Sulfate
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Prometrium
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Pycnogenol
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Pyridoxine HCL
Administration route: Oral
Indication: Drug USE FOR Unknown Indication
Stinging Nettle
Indication: Drug USE FOR Unknown Indication
Valerian
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Vitamin D
Administration route: Oral
Indication: Drug USE FOR Unknown Indication
Vitamin E
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Witch Hazel
Dosage: unknown
Indication: Drug USE FOR Unknown Indication
Adverse event in 54 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional on 2007-10-18
Patient: 54 year old female
Adverse reactions / side effects: Creutzfeldt-Jakob Disease
Suspect drug(s):
ALL Other Therapeutic Products
ALL Other Therapeutic Products
Dosage: daily dose:210mg
ALL Other Therapeutic Products
Dosage: daily dose:250mg
Calcium
Administration route: Oral
Celebrex
Administration route: Oral
Daypro Caplet
Dong Quai
Evening Primrose OIL
Flexeril
Administration route: Oral
Garlic
Dosage: text:2600 ug
Magnesium Sulfate
Oesclim
Prometrium
Pycnogenol
Tocopherol Concentrate CAP
Vitamin B6
Dosage: daily dose:250mg
Vitamin D
Administration route: Oral
Vitathion
Witch Hazel
Adverse event in 55 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a pharmacist from Canada on 2007-10-17
Patient: 55 year old female
Adverse reactions / side effects: Creutzfeldt-Jakob Disease
Suspect drug(s):
Calcium
Dosage: daily dose: 2 dosage form
Administration route: Oral
Indication: Ill-Defined Disorder
Celebrex
Dosage: daily dose: 1 dosage form
Administration route: Oral
Indication: Ill-Defined Disorder
Daypro
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Dong Quai
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Evening Primrose OIL
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Flexeril
Dosage: daily dose: 3 dosage form
Administration route: Oral
Indication: Ill-Defined Disorder
Garlic
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Horse Tail
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Magnesium Sulfate
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Oesclim
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Prometrium
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Pycnogenol
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Stinging Nettle
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Valerian
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Vitamin B6
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Vitamin D
Dosage: daily dose: 1 dosage form
Administration route: Oral
Indication: Ill-Defined Disorder
Vitamin E
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Vitathion
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Witch Hazel
Dosage: daily dose: unknown
Indication: Ill-Defined Disorder
Adverse event in female receiving Flexeril (Cyclobenzaprine)
Reported by a physician from United States on 2007-10-17
Patient: female
Adverse reactions / side effects: Confusional State, Mental Status Changes, Memory Impairment
Adverse event resulted in: hospitalization
Suspect drug(s):
Flexeril
Dosage: dose unknown
Indication: Drug USE FOR Unknown Indication
Wellbutrin
Dosage: dose unknown
Indication: Drug USE FOR Unknown Indication
Adverse event in female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-10-15
Patient: female
Adverse reactions / side effects: Tooth Fracture, Tooth Erosion, Bone Pain, Cardioactive Drug Level Decreased, Sensory Loss, Hypoaesthesia, Hepatic Enzyme Increased, High Density Lipoprotein Decreased, Device Failure, Tooth Discolouration, Blood Disorder, LOW Density Lipoprotein Increased, Tooth Disorder
Suspect drug(s):
Digitek
Flexeril
Lipitor
Indication: Blood Cholesterol
Neurontin
Indication: Bone Pain
Neurontin
Indication: Complex Regional Pain Syndrome
Warfarin Sodium
Other drugs received by patient: Toprol-XL; Toprol-XL; Klor-CON; Klor-CON; Synthroid; Synthroid; Klonopin; Klonopin; Wellbutrin XL; Wellbutrin XL; Welchol; Welchol; Combivent; Combivent; Omeprazole; Omeprazole; Folic Acid; Folic Acid; Zestril; Zestril; Lortab; Lortab; Xalatan; Xalatan; Diclofenac Sodium; Diclofenac Sodium; Pulmicort; Pulmicort; Duoneb; Duoneb; Theophylline; Theophylline; Lasix; Lasix; Lidoderm; Lidoderm
Adverse event in 97 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-10-02
Patient: 97 year old female
Adverse reactions / side effects: Wrong Technique in Drug Usage Process, Choking
Adverse event resulted in: death
Suspect drug(s):
Coreg
Indication: Drug USE FOR Unknown Indication
Flexeril
Indication: Drug USE FOR Unknown Indication
Percocet
Indication: Drug USE FOR Unknown Indication
Adverse event in 97 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-10-01
Patient: 97 year old female
Adverse reactions / side effects: Dyspnoea, Retching, Choking, Pulse Absent, Mobility Decreased, Loss of Consciousness
Adverse event resulted in: death
Suspect drug(s):
Coreg
Flexeril
Percocet
Adverse event in female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-07-31
Patient: female, weighing 65.8 kg (144.7 pounds)
Adverse reactions / side effects: Rash Generalised, Road Traffic Accident, Thinking Abnormal, Sarcoidosis, Somnolence, Stress
Suspect drug(s):
Duragesic-100
Dosage: 25ug/hr plus 100ug/hr patches
Duragesic-100
Indication: Pain
Duragesic-100
Indication: Back Pain
Fentanyl
Dosage: 100+25
Indication: Pain
Fentanyl
Indication: Back Pain
Flexeril
Administration route: Oral
Indication: Muscle Relaxant Therapy
Other drugs received by patient: Percocet
Adverse event in female receiving Flexeril (Cyclobenzaprine)
Reported by a health professional (non-physician/pharmacist) from United States on 2007-07-26
Patient: female, weighing 107.0 kg (235.5 pounds)
Adverse reactions / side effects: Cardiac Arrest
Adverse event resulted in: death
Suspect drug(s):
Flexeril (Cyclobenzaprine)
Adverse event in female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-07-26
Patient: female
Adverse reactions / side effects: Myocardial Infarction
Adverse event resulted in: death
Suspect drug(s):
Flexeril (Cyclobenzaprine)
Adverse event in 79 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a individual with unspecified qualification from United States on 2007-07-13
Patient: 79 year old female
Adverse reactions / side effects: Hot Flush, Bone Pain, Dyskinesia, Drug Interaction, Injury, Convulsion
Suspect drug(s):
Femara
Dosage: 2.5 mg, qd
Administration route: Oral
Indication: Breast Cancer
Start date: 2006-01-01
Flexeril
Indication: Injury
Start date: 2007-01-22
End date: 2007-01-22
Adverse event in female receiving Flexeril (Cyclobenzaprine)
Reported by a lawyer from United States on 2007-06-28
Patient: female, weighing 62.6 kg (137.7 pounds)
Adverse reactions / side effects: Electrocardiogram QT Prolonged, Cardio-Respiratory Arrest, Hypoxic Encephalopathy, Cardiomyopathy
Adverse event resulted in: hospitalization
Suspect drug(s):
Diflucan
Indication: Drug USE FOR Unknown Indication
Flexeril
Indication: Drug USE FOR Unknown Indication
Ortho Evra
Indication: Contraception
Adverse event in 52 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a physician from United States on 2007-06-25
Patient: 52 year old female, weighing 68.6 kg (150.9 pounds)
Adverse reactions / side effects: Myalgia, Rhabdomyolysis, Blood Creatine Phosphokinase Increased, Fatigue, Pain in Extremity
Adverse event resulted in: hospitalization
Suspect drug(s):
Crestor
Administration route: Oral
Indication: Hyperlipidaemia
Start date: 2007-03-07
End date: 2007-03-29
Flexeril
Dosage: short term
Naproxen
Other drugs received by patient: Synthroid
Adverse event in male receiving Flexeril (Cyclobenzaprine)
Reported by a individual with unspecified qualification from United States on 2007-06-15
Patient: male, weighing 102.3 kg (225.1 pounds)
Adverse reactions / side effects: Arthralgia
Suspect drug(s):
Chantix
Indication: Smoking Cessation Therapy
Flexeril
Indication: Pain
Gabapentin
Indication: Pain
Ibuprofen
Indication: Pain
Adverse event in female receiving Flexeril (Cyclobenzaprine)
Reported by a physician from United States on 2007-05-07
Patient: female
Adverse reactions / side effects: Drug Exposure During Pregnancy, Multiple Drug Overdose Intentional
Suspect drug(s):
Extra Strength Tylenol
Dosage: dose unknown
Indication: Intentional Drug Misuse
Flexeril
Dosage: entire bottle
Administration route: Oral
Flexeril
Administration route: Oral
Indication: Drug USE FOR Unknown Indication
Seroquel
Dosage: dose unknown
Indication: Drug USE FOR Unknown Indication
Other drugs received by patient: Prozac
Adverse event in 47 year old female receiving Flexeril (Cyclobenzaprine)
Reported by a consumer/non-health professional from United States on 2007-05-03
Patient: 47 year old female, weighing 118.4 kg (260.5 pounds)
Adverse reactions / side effects: Pneumonia, Hypotension, Somnolence, Meningococcal Infection, Multiple Drug Overdose Accidental, Insomnia, Depressed Level of Consciousness, Sputum Culture Positive, Lethargy, Influenza
Adverse event resulted in: hospitalization
Suspect drug(s):
Fentanyl(fentanyl) 800ug
Dosage: 80 ug, prn, buccal
Indication: Breakthrough Pain
Start date: 2005-05-25
Flexeril
Dosage: 40 mg
Indication: Muscle Spasms
Klonopin
Dosage: see image
Administration route: Oral
Indication: Anxiety
Start date: 2004-01-01
End date: 2005-06-13
Klonopin
Dosage: see image
Administration route: Oral
Indication: Anxiety
Start date: 2005-06-13
End date: 2005-11-17
Klonopin
Dosage: see image
Administration route: Oral
Indication: Anxiety
Start date: 2005-11-17
End date: 2005-11-28
Klonopin
Dosage: see image
Administration route: Oral
Indication: Anxiety
Start date: 2005-11-28
Lioresal
Dosage: 30 mg, qd, oral
Administration route: Oral
Indication: Muscle Spasms
Start date: 1995-01-01
Methadose
Dosage: see image
Administration route: Oral
Indication: Pain
Start date: 2002-01-01
End date: 2006-06-09
Methadose
Dosage: see image
Administration route: Oral
Indication: Pain
Start date: 2006-06-09
End date: 2006-11-27
Methadose
Dosage: see image
Administration route: Oral
Indication: Pain
Start date: 2006-11-27
Tenormin
Dosage: see image
Administration route: Oral
Indication: Hypertension
Start date: 2003-01-01
End date: 2005-09-07
Tenormin
Dosage: see image
Administration route: Oral
Indication: Hypertension
Start date: 2005-09-07
End date: 2005-10-17
Tenormin
Dosage: see image
Administration route: Oral
Indication: Hypertension
Start date: 2005-10-18
Other drugs received by patient: Protonix / 01263201 / (Pantoprazole); Ibuprofen; Tizanidine HCL; Albuterol / 00139501 / (Salbutamol); Trazodone HCL; Celexa; Amitriptyline HCL; Topamax; Percocet / 00446701 / (Oxycodone Hydrochloride, Oxycodone Terephthalate,
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