This is an index of side effect / adverse reaction reports (a.k.a. adverse event reports) related to Relenza (Zanamivir) and submitted to the FDA during the sample period of about a year. The information is not vetted and should not be considered as verified clinical evidence.
Reports by Event Outcome
All Cases (109)
Death (8)
Life Threatening Events (3)
Reports by Reaction Type
Abnormal Behaviour (40),
Hallucination (17),
Delirium (17),
Aggression (12),
Screaming (10),
Loss of Consciousness (8),
Nausea (8),
Convulsion (8),
Depressed Level of Consciousness (8),
Pyrexia (7),
Decreased Appetite (7),
Dyspnoea (7)
Below are a few examples of reports where side effects / adverse reactions may be related to Relenza (Zanamivir). For a complete list or a specific selection of reports, please use the links above.
Possible Relenza side effects in male
Reported by a physician from Japan on 2012-07-16
Patient: male, weighing 21.5 kg (47.3 pounds)
Reactions: Poor Quality Sleep, Nightmare, Fear, Depressed Level of Consciousness, Pyrexia, Hallucination
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Meiact; Leftose; Ibruprofen; Zesulan
Possible Relenza side effects in female
Reported by a physician from Japan on 2012-07-16
Patient: female
Reactions: Hypersensitivity, Dyspnoea, Anaphylactic Shock, Cardiac Failure Acute, Joint Stiffness, Pulse Absent, Depressed Level of Consciousness, Acute Respiratory Failure, Myocarditis
Adverse event resulted in: death
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Mucosta; Soldem; Ceftriaxone Sodium; Pelex; Levofloxacin; Acetaminophen; Soldem; Exacin; Unknown Drug
Possible Relenza side effects in 18 year old male
Reported by a pharmacist from Japan on 2012-07-05
Patient: 18 year old male
Reactions: Sudden Death
Adverse event resulted in: death
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Acetaminophen
Possible Relenza side effects in female
Reported by a physician from Japan on 2012-07-03
Patient: female
Reactions: Drug Eruption, Rash, Erythema
Drug(s) suspected as cause:
Relenza
Dosage: 20mg per day
Indication: Influenza
Start date: 2012-04-11
End date: 2012-04-13
Mucodyne
Dosage: 3iuax per day
Administration route: Oral
Indication: Nasopharyngitis
Start date: 2012-04-11
End date: 2012-04-13
Acetaminophen
Administration route: Oral
Indication: Nasopharyngitis
Start date: 2012-04-11
End date: 2012-04-13
Selbex
Dosage: 3iuax per day
Administration route: Oral
Indication: Abdominal Pain Upper
Start date: 2012-04-11
End date: 2012-04-13
Astomin
Dosage: 3iuax per day
Administration route: Oral
Indication: Nasopharyngitis
Start date: 2012-04-11
End date: 2012-04-13
Zithromax
Dosage: 2iuax per day
Administration route: Oral
Indication: Infection
Start date: 2012-04-11
End date: 2012-04-12
Other drugs received by patient: Alloid G; Celestamine TAB; Epinastine Hydrochloride; Tathion
Possible Relenza side effects in 19 year old male
Reported by a pharmacist from Japan on 2012-06-15
Patient: 19 year old male
Reactions: Death
Adverse event resulted in: death
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Acetaminophen
Possible Relenza side effects in female
Reported by a physician from Japan on 2012-06-08
Patient: female
Reactions: Hypersensitivity, Dyspnoea, Anaphylactic Shock, Pulse Absent, Depressed Level of Consciousness, Joint Stiffness
Adverse event resulted in: death
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Levofloxacin; Soldem; Exacin; Mucosta; Soldem; Ceftriaxone Sodium; Pelex; Unknown Medication; Acetaminophen
Possible Relenza side effects in female
Reported by a physician from Japan on 2012-05-30
Patient: female, weighing 54.0 kg (118.8 pounds)
Reactions: Abnormal Behaviour, Delirium
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Mucosolvan; Clarithromycin; Acetaminophen; Unknown Drug; Isodine Gargle
Possible Relenza side effects in 36 year old female
Reported by a physician from Japan on 2012-05-30
Patient: 36 year old female
Reactions: Anaphylactic Shock
Adverse event resulted in: death
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Rocephin; Exacin; Soldem
Possible Relenza side effects in 21 year old female
Reported by a physician from Japan on 2012-05-29
Patient: 21 year old female
Reactions: Dyspnoea, Wheezing, Bronchospasm, Pallor
Adverse event resulted in: life threatening event
Drug(s) suspected as cause:
Relenza
Dosage: 20mg per day
Indication: Influenza
Start date: 2009-10-16
Voltaren
Indication: Product Used FOR Unknown Indication
Possible Relenza side effects in 9 year old male
Reported by a physician from Japan on 2012-05-29
Patient: 9 year old male
Reactions: Speech Disorder, Dyspnoea, Wheezing, Bronchospasm, Respiratory Distress
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Relenza
Dosage: 20mg per day
Indication: Influenza
Start date: 2012-03-17
Voltaren
Indication: Product Used FOR Unknown Indication
Start date: 2012-03-17
Other drugs received by patient: Singulair
Possible Relenza side effects in female
Reported by a physician from Japan on 2012-05-24
Patient: female
Reactions: Abnormal Behaviour, Delirium
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Acetaminophen; Clarithromycin; Mucosolvan; Unknown Drug; Isodine Gargle
Possible Relenza side effects in male
Reported by a physician from Japan on 2012-05-23
Patient: male, weighing 22.0 kg (48.4 pounds)
Reactions: Agitation, Restlessness
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Ibruprofen; Meiact
Possible Relenza side effects in 7 year old male
Reported by a physician from Japan on 2012-05-22
Patient: 7 year old male
Reactions: Nightmare, Hallucination
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Ibruprofen; Meiact; Zesulan
Possible Relenza side effects in 9 year old male
Reported by a physician from Japan on 2012-05-17
Patient: 9 year old male
Reactions: Speech Disorder, Dyspnoea, Wheezing, Bronchospasm, Respiratory Distress
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Singulair; Voltaren
Possible Relenza side effects in 21 year old female
Reported by a physician from Japan on 2012-05-17
Patient: 21 year old female
Reactions: Dyspnoea, Wheezing, Bronchospasm, Pallor
Adverse event resulted in: life threatening event
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in male
Reported by a physician from Japan on 2012-05-16
Patient: male, weighing 22.0 kg (48.4 pounds)
Reactions: Agitation, Nightmare, Restlessness, Hallucination
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Ibruprofen; Meiact
Possible Relenza side effects in male
Reported by a physician from Japan on 2012-05-10
Patient: male
Reactions: Drug Eruption, Pruritus, Pyrexia, Headache, Erythema, Feeling Cold, Gamma-Glutamyltransferase Increased, Neck Pain, C-Reactive Protein Increased, Skin Discolouration, Bacterial Infection, Decreased Appetite, White Blood Cell Count Increased, Protein Urine Present, Vomiting, Blood Lactate Dehydrogenase Increased, Rash, Dysgeusia, Arthralgia, Diarrhoea, Depressed Level of Consciousness, Feeling Abnormal
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in male
Reported by a physician from Japan on 2012-05-09
Patient: male, weighing 39.0 kg (85.8 pounds)
Reactions: Vision Blurred, Sleep Talking, Delirium
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in male
Reported by a physician from Japan on 2012-05-02
Patient: male, weighing 39.0 kg (85.8 pounds)
Reactions: Vision Blurred, Delirium
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in 29 year old male
Reported by a physician from Japan on 2012-05-02
Patient: 29 year old male
Reactions: Dysgeusia, Vomiting, Diarrhoea, Skin Discolouration, Depressed Level of Consciousness, Rash, Feeling Abnormal, Decreased Appetite
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in 8 year old male
Reported by a pharmacist from Japan on 2012-04-25
Patient: 8 year old male, weighing 30.0 kg (66.0 pounds)
Reactions: Hallucination, Auditory, Dizziness, Abnormal Behaviour, Hallucination
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in 11 year old male
Reported by a physician from Japan on 2012-04-25
Patient: 11 year old male
Reactions: Vision Blurred, Delirium
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in
Reported by a consumer/non-health professional from Japan on 2012-04-25
Patient:
Reactions: Abdominal Pain, Nausea, Anaemia
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in female
Reported by a health professional (non-physician/pharmacist) from Japan on 2012-04-24
Patient: female
Reactions: Hepatitis C
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Relenza
Other drugs received by patient: Chinese Medicine; Juvela N; Unknown Drug; Transamine CAP; Cinal; Alosenn; Pydoxal
Possible Relenza side effects in 12 year old female
Reported by a pharmacist from Japan on 2012-04-24
Patient: 12 year old female
Reactions: Nausea, Decreased Appetite
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Relenza
Start date: 2012-04-01
Relenza
Indication: Influenza
Start date: 2012-01-01
Possible Relenza side effects in female
Reported by a consumer/non-health professional from Japan on 2012-04-18
Patient: female
Reactions: Ageusia, Anosmia
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in 7 year old female
Reported by a pharmacist from Japan on 2012-04-16
Patient: 7 year old female
Reactions: Screaming
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in male
Reported by a pharmacist from Japan on 2012-04-11
Patient: male
Reactions: Ageusia, Anosmia
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in female
Reported by a consumer/non-health professional from Japan on 2012-04-11
Patient: female
Reactions: Back Pain, Arthropathy, Syncope
Drug(s) suspected as cause:
Relenza
Possible Relenza side effects in female
Reported by a consumer/non-health professional from Japan on 2012-04-11
Patient: female
Reactions: Productive Cough, Conversion Disorder, Schizophrenia, Pyrexia, Photopsia, Pruritus Generalised, Palpitations, Screaming, Muscle Spasms, Ear Discomfort, Dyspnoea, Rhinorrhoea, DRY Skin, Convulsion, Dandruff, Affect Lability, Dysphonia, Asthenia
Drug(s) suspected as cause:
Relenza
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