This is an index of side effect / adverse reaction reports (a.k.a. adverse event reports) related to Pegasys (Peginterferon Alfa-2A) 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 (2397)
Death (302)
Life Threatening Events (116)
Disability (71)
Reports by Reaction Type
Anaemia (352),
Nausea (186),
Fatigue (180),
White Blood Cell Count Decreased (162),
Vomiting (133),
Asthenia (129),
Pyrexia (125),
Death (125),
Rash (124),
Dyspnoea (116),
Platelet Count Decreased (114),
Diarrhoea (98)
Below are a few examples of reports where side effects / adverse reactions may be related to Pegasys (Peginterferon Alfa-2A). For a complete list or a specific selection of reports, please use the links above.
Possible Pegasys side effects in female
Reported by a physician from United States on 2012-08-27
Patient: female, weighing 66.7 kg (146.8 pounds)
Reactions: Anaemia, Neutropenia, Thrombocytopenia
Drug(s) suspected as cause:
Pegasys
Indication: Hepatitis C
Start date: 2012-05-30
End date: 2012-07-29
Incivek
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-05-31
End date: 2012-07-29
Copegus
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-05-31
End date: 2012-07-29
Possible Pegasys side effects in
Reported by a health professional (non-physician/pharmacist) from United States on 2012-08-27
Patient:
Reactions: Anaemia
Drug(s) suspected as cause:
Pegasys
Ribavirin
Victrelis
Dosage: 800 mg, tid
Start date: 2012-03-01
End date: 2012-05-10
Other drugs received by patient: Simvastatin; Plavix; Lisinopril and Hydrochlorothiazide
Possible Pegasys side effects in female
Reported by a consumer/non-health professional from Russian Federation on 2012-08-27
Patient: female
Reactions: Tooth Extraction, Oedema, Dental Care
Drug(s) suspected as cause:
Pegasys
Indication: Hepatitis C
Start date: 2011-08-16
End date: 2012-06-29
Ribavirin
Administration route: Oral
Indication: Hepatitis C
Start date: 2011-08-16
End date: 2012-06-29
Other drugs received by patient: Tmc435
Possible Pegasys side effects in female
Reported by a physician from France on 2012-08-27
Patient: female, weighing 65.0 kg (143.0 pounds)
Reactions: Mucosal Ulceration, Purpura, Rash Maculo-Papular, Toxic Skin Eruption
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Pegasys
Dosage: dosage form: injection
Indication: Hepatitis C
Start date: 2012-06-01
End date: 2012-07-17
Copegus
Dosage: dosage form: tablets
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-06-01
End date: 2012-07-17
Incivek
Dosage: dosage form: tablet
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-06-01
End date: 2012-07-15
Incivek
Dosage: dosage form: tablet
Administration route: Oral
Start date: 2012-06-01
End date: 2012-07-15
Possible Pegasys side effects in female
Reported by a consumer/non-health professional from United States on 2012-08-27
Patient: female, weighing 83.0 kg (182.6 pounds)
Reactions: Tongue Ulceration, Thermoanaesthesia, Rash Pruritic, Oral Discomfort, Fatigue, Cough, Vomiting, Nausea, Haemorrhoids, Hypoaesthesia, Cognitive Disorder, Aptyalism, Anal Fissure, Anxiety, Throat Irritation, Diarrhoea, Dehydration, Insomnia
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Incivek
Dosage: 750 mg, tid
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-07-27
End date: 2012-08-04
Pegasys
Dosage: 180 unk, unk
Indication: Hepatitis C
Start date: 2012-07-27
End date: 2012-08-04
Ribavirin
Dosage: 600 mg, bid
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-07-27
End date: 2012-08-04
Possible Pegasys side effects in male
Reported by a pharmacist from United States on 2012-08-27
Patient: male, weighing 79.0 kg (173.8 pounds)
Reactions: Swelling Face, Neutropenia, Rash Pruritic
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Incivek
Dosage: 750 mg, tid
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-04-01
Pegasys
Dosage: unk
Indication: Hepatitis C
Start date: 2012-04-01
Ribavirin
Dosage: unk
Indication: Hepatitis C
Start date: 2012-04-01
Possible Pegasys side effects in
Reported by a health professional (non-physician/pharmacist) from United States on 2012-08-27
Patient:
Reactions: Pruritus, Nasopharyngitis, Feeling Hot
Drug(s) suspected as cause:
Pegasys
Dosage: unk
Indication: Hepatitis C
Start date: 2012-07-15
Rebetol
Dosage: unk
Indication: Hepatitis C
Start date: 2012-07-15
Possible Pegasys side effects in 50 year old female
Reported by a consumer/non-health professional from Australia on 2012-08-27
Patient: 50 year old female
Reactions: Recurrent Cancer, Malignant Melanoma
Drug(s) suspected as cause:
Pegasys
Possible Pegasys side effects in
Reported by a health professional (non-physician/pharmacist) from United States on 2012-08-27
Patient:
Reactions: Liver Injury, Viral Load Increased, Drug Ineffective
Drug(s) suspected as cause:
Pegasys
Dosage: unk
Start date: 2012-06-28
End date: 2012-08-02
Rebetol
Dosage: unk
Start date: 2012-06-28
End date: 2012-08-02
PEG-Intron
Dosage: unk
Indication: Hepatitis C
Start date: 2009-01-01
End date: 2010-01-01
Rebetol
Dosage: unk
Indication: Hepatitis C
Start date: 2010-01-01
End date: 2011-01-01
Pegasys
Dosage: unk
Indication: Hepatitis C
Start date: 2010-01-01
End date: 2011-01-01
Telaprevir
Dosage: unk
Indication: Hepatitis C
Start date: 2012-06-28
End date: 2012-08-02
Possible Pegasys side effects in male
Reported by a health professional (non-physician/pharmacist) from China on 2012-08-27
Patient: male, weighing 65.0 kg (143.0 pounds)
Reactions: Osteonecrosis
Drug(s) suspected as cause:
Pegasys
Other drugs received by patient: Leucogen (Asparaginase)
Possible Pegasys side effects in male
Reported by a consumer/non-health professional from United States on 2012-08-27
Patient: male
Reactions: Drug Ineffective, Diabetes Mellitus, Urinary Tract Infection, Musculoskeletal Stiffness, Diabetic Complication, Influenza Like Illness
Drug(s) suspected as cause:
Pegasys
Indication: Product Used FOR Unknown Indication
Start date: 2006-02-08
End date: 2006-06-16
Ribavirin
Indication: Product Used FOR Unknown Indication
Possible Pegasys side effects in
Reported by a consumer/non-health professional from United States on 2012-08-27
Patient: , weighing 117.9 kg (259.4 pounds)
Reactions: Abscess Rupture, Peritonitis
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Incivek
Dosage: 750 mg, tid
Administration route: Oral
Indication: Hepatitis C
Start date: 2011-07-18
End date: 2012-08-01
Incivek
Dosage: 750 mg, tid
Administration route: Oral
Start date: 2012-01-20
End date: 2012-05-18
Ribavirin
Dosage: unk
Indication: Hepatitis C
Start date: 2011-07-18
End date: 2012-05-18
Pegasys
Dosage: 180 a?g, unk
Indication: Hepatitis C
Start date: 2011-07-18
End date: 2012-05-18
Possible Pegasys side effects in
Reported by a pharmacist from Spain on 2012-08-27
Patient:
Reactions: Anaemia, Neutropenia
Drug(s) suspected as cause:
Pegasys
Dosage: semanal
Start date: 2011-09-29
Rebetol
Dosage: 1200/dia y pegasys semanal.
Administration route: Oral
Start date: 2011-09-29
Possible Pegasys side effects in
Reported by a health professional (non-physician/pharmacist) from Colombia on 2012-08-27
Patient:
Reactions: Pallor, Asthenia
Drug(s) suspected as cause:
Pegasys
Victrelis
Dosage: 800 mg, tid
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-07-10
End date: 2012-08-01
Rebetol
Other drugs received by patient: Epoetin
Possible Pegasys side effects in female
Reported by a health professional (non-physician/pharmacist) from United States on 2012-08-27
Patient: female
Reactions: Cardiac Failure Congestive
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Ribavirin
Indication: Hepatitis C
Start date: 2007-11-15
End date: 2008-10-01
Pegasys
Indication: Hepatitis C
Start date: 2007-11-15
End date: 2008-10-01
Possible Pegasys side effects in
Reported by a health professional (non-physician/pharmacist) from United States on 2012-08-27
Patient:
Reactions: Weight Increased, Dysgeusia, Arthritis, Full Blood Count Decreased
Drug(s) suspected as cause:
Victrelis
Dosage: unk
Indication: Hepatitis C
Start date: 2012-07-16
Rebetol
Dosage: unk
Indication: Hepatitis C
Start date: 2012-06-18
Pegasys
Dosage: unk
Indication: Hepatitis C
Start date: 2012-06-18
Possible Pegasys side effects in male
Reported by a consumer/non-health professional from United States on 2012-08-27
Patient: male, weighing 90.7 kg (199.5 pounds)
Reactions: Fatigue, Wrist Fracture, Diarrhoea, Liver Function Test Abnormal, Anaemia, Haemorrhoids, Asthenia
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Ribavirin
Dosage: 1000 mg, bid
Administration route: Oral
Indication: Hepatitis C
End date: 2012-07-01
VX-950
Dosage: unk
Administration route: Oral
VX-950
Dosage: 750 mg, tid
Administration route: Oral
Indication: Hepatitis C
Start date: 2011-07-01
End date: 2011-10-01
Pegasys
Dosage: 180 unk, unk
Indication: Hepatitis C
End date: 2012-07-01
Possible Pegasys side effects in female
Reported by a consumer/non-health professional from United States on 2012-08-27
Patient: female
Reactions: Loss of Consciousness
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Ribavirin
Dosage: 600 mg, unk
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-07-23
VX-950
Dosage: 750 mg, tid
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-07-23
Pegasys
Dosage: 180 unk, unk
Indication: Hepatitis C
Start date: 2012-07-23
Possible Pegasys side effects in
Reported by a consumer/non-health professional from United States on 2012-08-27
Patient:
Reactions: Dyspnoea, Fatigue, DRY Mouth
Drug(s) suspected as cause:
Rebetol
Dosage: 3 df, bid
Administration route: Oral
Victrelis
Dosage: 200 mg, unk
Pegasys
Dosage: 180 micrograms/0.5 ml pfs
Possible Pegasys side effects in male
Reported by a health professional (non-physician/pharmacist) from China on 2012-08-27
Patient: male, weighing 61.5 kg (135.3 pounds)
Reactions: Occult Blood, Anaemia, Faeces Discoloured
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Pegasys
Indication: Hepatitis C
Start date: 2009-02-01
End date: 2009-04-07
Ribavirin
Administration route: Oral
Indication: Hepatitis C
Start date: 2008-08-01
End date: 2009-04-07
Other drugs received by patient: Sirolimus
Possible Pegasys side effects in male
Reported by a consumer/non-health professional from United States on 2012-08-27
Patient: male
Reactions: Night Sweats, Body Temperature Increased, Anaemia, Ascites, Dysgeusia, Insomnia, Blood Uric Acid Increased, Oedema Peripheral, Sinusitis
Drug(s) suspected as cause:
Ribavirin
Dosage: 400 mg, bid
Administration route: Oral
Indication: Hepatitis C
Start date: 2011-11-20
VX-950
Dosage: 750 mg, tid
Administration route: Oral
Indication: Hepatitis C
Start date: 2011-11-20
End date: 2012-02-12
Pegasys
Dosage: 180 a?g, unk
Indication: Hepatitis C
Start date: 2011-11-20
Possible Pegasys side effects in male
Reported by a consumer/non-health professional from United States on 2012-08-27
Patient: male, weighing 81.6 kg (179.6 pounds)
Reactions: Fatigue, Dizziness, Vision Blurred, Feeling Abnormal, Blood Glucose Increased
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Incivek
Dosage: 750 mg, tid
Administration route: Oral
Start date: 2012-08-12
Ribavirin
Dosage: unk
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-07-14
End date: 2012-08-12
Ribavirin
Dosage: unk
Administration route: Oral
Start date: 2012-08-12
Pegasys
Dosage: 180 unk, unk
Start date: 2012-08-12
Pegasys
Dosage: 180 unk, unk
Indication: Hepatitis C
Start date: 2012-07-14
End date: 2012-08-03
Incivek
Dosage: 750 mg, tid
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-07-14
End date: 2012-08-10
Possible Pegasys side effects in
Reported by a health professional (non-physician/pharmacist) from United States on 2012-08-25
Patient:
Reactions: Stomatitis, Fatigue, DRY Mouth, Decreased Appetite
Drug(s) suspected as cause:
Pegasys
Dosage: unk
Indication: Hepatitis C
Start date: 2012-06-19
Victrelis
Dosage: unk
Indication: Hepatitis C
Start date: 2012-07-22
Rebetol
Dosage: unk
Indication: Hepatitis C
Start date: 2012-06-19
Other drugs received by patient: Gabapentin; Metformin HCL; Levothyroxine Sodium; Acyclovir; Lisinopril; Levetiracetam
Possible Pegasys side effects in
Reported by a physician from United States on 2012-08-25
Patient:
Reactions: Insomnia, Pyrexia, Somnolence, Lethargy
Drug(s) suspected as cause:
Victrelis
Dosage: unk
Indication: Hepatitis C
Start date: 2012-07-21
Rebetol
Dosage: unk
Indication: Hepatitis C
Start date: 2012-06-22
Pegasys
Dosage: unk
Indication: Hepatitis C
Start date: 2012-06-22
Possible Pegasys side effects in
Reported by a physician from United States on 2012-08-25
Patient:
Reactions: White Blood Cell Count Decreased, Neutropenia
Drug(s) suspected as cause:
Ribasphere
Pegasys
Victrelis
Dosage: 800 mg, tid
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-05-11
Possible Pegasys side effects in female
Reported by a consumer/non-health professional from United States on 2012-08-25
Patient: female
Reactions: Cholelithiasis, Weight Decreased, Peroneal Nerve Palsy, Fear, Transfusion, Asthenia, Myocardial Infarction, Blood Test Abnormal
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Ribavirin
Indication: Hepatitis C
Start date: 2011-09-16
Pegasys
Indication: Hepatitis C
Start date: 2011-09-16
End date: 2012-06-27
Victrelis
Indication: Hepatitis C
End date: 2012-06-27
Ribavirin
End date: 2012-06-27
Possible Pegasys side effects in female
Reported by a physician from Turkey on 2012-08-24
Patient: female, weighing 58.0 kg (127.6 pounds)
Reactions: Anaemia, Platelet Count Decreased, Leukopenia
Drug(s) suspected as cause:
VX-950
Dosage: dosage form: tablet, 3 times as two tablet
Administration route: Oral
Indication: Hepatitis C
Pegasys
Dosage: dosage form: unspecified
Indication: Hepatitis C
Copegus
Dosage: dosage form: unknown
Indication: Hepatitis C
Possible Pegasys side effects in
Reported by a consumer/non-health professional from United States on 2012-08-24
Patient:
Reactions: Death, Product Quality Issue, Bacterial Infection
Adverse event resulted in: death
Drug(s) suspected as cause:
Pegasys
Indication: Product Used FOR Unknown Indication
Alcohol Swab
Indication: Product Used FOR Unknown Indication
Possible Pegasys side effects in 45 year old female
Reported by a pharmacist from United States on 2012-08-24
Patient: 45 year old female
Reactions: Abdominal Pain Upper
Drug(s) suspected as cause:
Ribavirin
Dosage: 1200mg daily po
Administration route: Oral
Indication: Hepatitis C
Start date: 2012-07-04
Pegasys
Dosage: 180mcg weekly sq
Indication: Hepatitis C
Start date: 2012-07-04
Other drugs received by patient: Incivek
Possible Pegasys side effects in
Reported by a physician from United States on 2012-08-24
Patient:
Reactions: White Blood Cell Count Decreased, Unevaluable Event
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Pegasys
Victrelis
Dosage: 200 mg, unk
Administration route: Oral
Start date: 2012-07-02
End date: 2012-07-01
Ribasphere
Administration route: Oral
Other drugs received by patient: Neupogen
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