This is an index of side effect / adverse reaction reports (a.k.a. adverse event reports) related to Valtrex (Valacyclovir) 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 (388)
Death (9)
Life Threatening Events (12)
Disability (10)
Reports by Reaction Type
Renal Failure Acute (58),
Altered State of Consciousness (49),
Encephalopathy (42),
Dysarthria (41),
Blood Creatinine Increased (39),
Renal Impairment (36),
Dizziness (32),
Blood Urea Increased (26),
Drug Ineffective (25),
Malaise (25),
Decreased Appetite (25),
Nausea (23)
Below are a few examples of reports where side effects / adverse reactions may be related to Valtrex (Valacyclovir). For a complete list or a specific selection of reports, please use the links above.
Possible Valtrex side effects in
Reported by a physician from United States on 2012-08-23
Patient:
Reactions: Pruritus, Hypersensitivity, Contusion, Chills, Headache, Herpes Zoster, Vascular Injury, Fatigue, Malaise, Tongue Disorder, Candidiasis, Scratch, Swelling Face, Vomiting, Tongue Oedema, Nausea, Anaemia, Hypoaesthesia, Rash, Dysgeusia, Diarrhoea, Feeling Abnormal, Influenza
Drug(s) suspected as cause:
PEG-Intron
Dosage: unk unk, unknown
Indication: Hepatitis C
Start date: 2012-05-04
Rebetol
Dosage: unk unk, unknown
Indication: Hepatitis C
Start date: 2012-05-04
Valtrex
Dosage: unk unk, unknown
Indication: Herpes Zoster
Victrelis
Dosage: unk unk, unknown
Indication: Hepatitis C
Start date: 2012-06-01
Possible Valtrex side effects in 76 year old male
Reported by a pharmacist from Japan on 2012-08-22
Patient: 76 year old male
Reactions: Renal Failure, Altered State of Consciousness
Drug(s) suspected as cause:
Valtrex
Possible Valtrex side effects in female
Reported by a pharmacist from Japan on 2012-08-22
Patient: female, weighing 52.0 kg (114.4 pounds)
Reactions: Renal Impairment, Blood Urea Increased, Blood Electrolytes Abnormal, Altered State of Consciousness, Blood Creatinine Increased, Renal Failure Acute
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Arasena-A
Administration route: Topical
Indication: Herpes Zoster
Start date: 2012-06-26
End date: 2012-06-30
Valtrex
Dosage: 3000mg per day
Administration route: Oral
Indication: Herpes Zoster
Start date: 2012-06-26
End date: 2012-06-30
Other drugs received by patient: Amlodipine; Risperdal; Depas; Micardis
Possible Valtrex side effects in female
Reported by a consumer/non-health professional from United States on 2012-08-21
Patient: female
Reactions: Maternal Exposure During Pregnancy, Abortion Spontaneous
Drug(s) suspected as cause:
Valtrex
Possible Valtrex side effects in 62 year old female
Reported by a physician from Japan on 2012-08-20
Patient: 62 year old female, weighing 66.0 kg (145.2 pounds)
Reactions: Dysarthria, Overdose, Altered State of Consciousness, Loss of Consciousness, Tremor
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Dosage: 500mg per day
Administration route: Oral
Start date: 2011-04-26
End date: 2011-04-27
Valtrex
Dosage: 1000mg per day
Administration route: Oral
Indication: Herpes Zoster
Start date: 2011-04-25
End date: 2011-04-25
Other drugs received by patient: Tenormin; Mefenamic Acid; Adalat; Vitamin B12; Renagel; Alosenn; Cinacalcet Hydrochloride; Famotidine; Precipitated Calcium Carbonate
Possible Valtrex side effects in 90 year old female
Reported by a pharmacist from Japan on 2012-08-17
Patient: 90 year old female
Reactions: Overdose, Carotid Artery Occlusion, Cerebral Artery Occlusion, Hallucination
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Dosage: 3000mg per day
Administration route: Oral
Indication: Herpes Zoster Oticus
Start date: 2012-03-09
End date: 2012-03-13
Valtrex
Dosage: 1000mg per day
Administration route: Oral
Start date: 2012-03-14
End date: 2012-03-16
Other drugs received by patient: Enalapril Maleate; Furosemide; Pursennid; Amlodipine; Voltaren; Aldactone; Tocopherol Concentrate CAP; Ferrous Citrate; Aspirin; Lipitor; Acetaminophen
Possible Valtrex side effects in 73 year old female
Reported by a consumer/non-health professional from Japan on 2012-08-15
Patient: 73 year old female
Reactions: Dysuria, Asthenia, Renal Failure Acute
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Unknown Drug
Valtrex
Dosage: 3000mg per day
Administration route: Oral
Indication: Herpes Zoster
Start date: 2011-10-08
End date: 2011-10-12
Possible Valtrex side effects in female
Reported by a physician from Japan on 2012-08-14
Patient: female
Reactions: Speech Disorder, Blood Urea Increased, Overdose, Vomiting, Nervous System Disorder, Blood Creatinine Increased, Renal Failure Acute, Thrombosis in Device
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Other drugs received by patient: Diclofenac Sodium
Possible Valtrex side effects in female
Reported by a physician from Japan on 2012-08-13
Patient: female, weighing 52.0 kg (114.4 pounds)
Reactions: Blood Urea Increased, Blood Potassium Increased, Dysarthria, Communication Disorder, Blood Uric Acid Increased, Nervous System Disorder, Asthenia, Blood Creatinine Increased, Renal Failure Acute
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Dosage: 3000mg per day
Administration route: Oral
Indication: Herpes Zoster
Start date: 2012-07-17
End date: 2012-07-23
Zovirax
Dosage: 250mg per day
Indication: Herpes Zoster
Start date: 2012-07-17
End date: 2012-07-21
Other drugs received by patient: Atelec; Pravastatin Sodium; Losartan Potassium and Hydrochlorothiazide
Possible Valtrex side effects in male
Reported by a health professional (non-physician/pharmacist) from Japan on 2012-08-13
Patient: male
Reactions: Affect Lability, Hallucination
Drug(s) suspected as cause:
Valtrex
Other drugs received by patient: Furosemide; Nesina; Clonazepam; Promac; Aspirin; Sigmart; Famotidine; Menest
Possible Valtrex side effects in 93 year old female
Reported by a physician from Japan on 2012-08-13
Patient: 93 year old female, weighing 37.0 kg (81.4 pounds)
Reactions: Hyperventilation, Soliloquy, Dyskinesia, Abnormal Behaviour, Encephalopathy, Somnolence, Logorrhoea
Drug(s) suspected as cause:
Valtrex
Possible Valtrex side effects in
Reported by a health professional (non-physician/pharmacist) from United States on 2012-08-09
Patient:
Reactions: Foetal Exposure During Pregnancy, Ventricular Septal Defect
Drug(s) suspected as cause:
Effexor
Dosage: 75 mg, unk
Indication: Depression
Start date: 2007-01-01
End date: 2010-11-30
PEG-Intron
Dosage: unk
Start date: 2009-01-01
End date: 2010-06-04
Proventil
Dosage: unk, prn
Indication: Asthma
Ribavirin (+) Interferon Alfa-2B
Dosage: unk
Start date: 2009-01-01
End date: 2010-06-04
Suboxone
Dosage: 10 mg, unk
Indication: Drug Dependence
Start date: 2009-06-01
End date: 2010-10-08
Subutex
Dosage: 8 mg, unk
Indication: Drug Dependence
Start date: 2010-10-09
Valtrex
Dosage: 1 g, unk
Indication: Herpes Virus Infection
Start date: 2011-04-19
Zoloft
Dosage: 50 mg, unk
Indication: Depression
Start date: 2010-11-30
Other drugs received by patient: Vitamins (Unspecified)
Possible Valtrex side effects in 73 year old male
Reported by a consumer/non-health professional from United States on 2012-08-08
Patient: 73 year old male
Reactions: Dysphagia, International Normalised Ratio Increased, General Physical Health Deterioration, Erosive Oesophagitis, Rash, International Normalised Ratio Fluctuation
Adverse event resulted in: life threatening event, hospitalization
Drug(s) suspected as cause:
Acyclovir
Indication: Herpes Simplex
Start date: 2012-06-07
End date: 2012-06-18
Clindamycin
Indication: Herpes Simplex
Start date: 2012-06-07
End date: 2012-06-18
Coumadin
Dosage: 7.5mg unknown
Indication: Product Used FOR Unknown Indication
Start date: 2012-06-07
Valtrex
Dosage: 500mg twice per day
Administration route: Oral
Indication: Product Used FOR Unknown Indication
Start date: 2012-06-17
End date: 2012-06-23
Other drugs received by patient: Zovirax; Digoxin; Prednisone TAB; Bactroban; Amiodarone HCL; Omeprazole
Possible Valtrex side effects in male
Reported by a pharmacist from Japan on 2012-08-08
Patient: male
Reactions: Overdose, Depressed Level of Consciousness, Encephalopathy, Nervous System Disorder
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Other drugs received by patient: Warfarin Sodium; Furosemide; Aspirin; Rocaltrol
Possible Valtrex side effects in female
Reported by a pharmacist from Japan on 2012-08-08
Patient: female
Reactions: Drug Level Increased, Heat Illness, Dehydration, Renal Failure Acute
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Other drugs received by patient: Acycril; Recalbon; Loxonin; Arasena-A; Amitriptyline HCL; Mucosta; Allegra; Epadel; Diflunisal; Uritos; Atorvastatin
Possible Valtrex side effects in 76 year old female
Reported by a physician from Japan on 2012-08-06
Patient: 76 year old female
Reactions: Protein Urine Present, Blood Urine Present, Laboratory Test Abnormal, Renal Disorder
Drug(s) suspected as cause:
Valtrex
Other drugs received by patient: Adalat; Vitamin B12; Acetaminophen; Candesartan Cilexetil
Possible Valtrex side effects in
Reported by a health professional (non-physician/pharmacist) from United States on 2012-08-03
Patient:
Reactions: Contusion, Hypersensitivity, Chills, Herpes Zoster, Vascular Injury, Face Oedema, Malaise, Tongue Disorder, Candidiasis, Scratch, Vomiting, Tongue Oedema, Rash, Hypoaesthesia, Dysgeusia, Diarrhoea, Feeling Abnormal, Influenza
Drug(s) suspected as cause:
PEG-Intron
Dosage: unk unk, unknown
Indication: Hepatitis C
Start date: 2012-05-04
Ribavirin
Dosage: unk unk, unknown
Indication: Hepatitis C
Start date: 2012-05-04
Valtrex
Dosage: unk unk, unknown
Indication: Herpes Zoster
Victrelis
Dosage: unk unk, unknown
Indication: Hepatitis C
Start date: 2012-06-01
Possible Valtrex side effects in female
Reported by a physician from Japan on 2012-08-01
Patient: female, weighing 39.0 kg (85.8 pounds)
Reactions: Dizziness, Encephalopathy, Gait Disturbance, Feeling Abnormal
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Other drugs received by patient: Norvasc; Crestor; Precipitated Calcium Carbonate; Nalfurafine Hydrochloride
Possible Valtrex side effects in female
Reported by a physician from Japan on 2012-08-01
Patient: female, weighing 52.0 kg (114.4 pounds)
Reactions: Blood Urea Increased, Renal Impairment, Blood Electrolytes Abnormal, Altered State of Consciousness, Blood Creatinine Increased
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Other drugs received by patient: Risperdal; Amlodipine; Depas; Micardis; Arasena-A
Possible Valtrex side effects in female
Reported by a consumer/non-health professional from Japan on 2012-07-31
Patient: female
Reactions: Abdominal Discomfort, Vulval Haemorrhage, Diarrhoea
Drug(s) suspected as cause:
Valtrex
Possible Valtrex side effects in female
Reported by a physician from Japan on 2012-07-31
Patient: female
Reactions: Dysarthria, Renal Failure Acute
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Dosage: 3000mg per day
Administration route: Oral
Indication: Herpes Zoster
Start date: 2012-07-17
End date: 2012-07-23
Zovirax
Dosage: 250mg per day
Indication: Herpes Zoster
Start date: 2012-07-17
End date: 2012-07-21
Other drugs received by patient: Losartan Potassium and Hydrochlorothiazide; Atelec; Pravastatin Sodium
Possible Valtrex side effects in female
Reported by a consumer/non-health professional from United States on 2012-07-31
Patient: female
Reactions: Product Substitution Issue, Drug Effect Delayed
Drug(s) suspected as cause:
Valtrex
Possible Valtrex side effects in female
Reported by a physician from Japan on 2012-07-31
Patient: female, weighing 40.0 kg (88.0 pounds)
Reactions: Renal Disorder, Encephalitis, Cognitive Disorder, Delirium, Speech Disorder, Nervous System Disorder, Meningitis, Altered State of Consciousness, Renal Failure Acute
Adverse event resulted in: hospitalization, disablity
Drug(s) suspected as cause:
Valtrex
Other drugs received by patient: Atenolol; Sermion; Alfarol; Tenormin; Amlodipine; Lansoprazole; Cefazolin Sodium
Possible Valtrex side effects in 24 year old female
Reported by a health professional (non-physician/pharmacist) from Argentina on 2012-07-30
Patient: 24 year old female
Reactions: Vaginal Haemorrhage
Drug(s) suspected as cause:
Valtrex
Possible Valtrex side effects in female
Reported by a physician from Japan on 2012-07-26
Patient: female, weighing 47.0 kg (103.4 pounds)
Reactions: Renal Disorder, Blood Urea Increased, Myoglobin Urine Present, Blood Lactate Dehydrogenase Increased, Renal Impairment, Blood Uric Acid Increased, Dizziness, Coordination Abnormal, Myoglobin Blood Increased, Blood Creatinine Increased, Renal Failure Acute, Anuria
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Other drugs received by patient: Paxil; Metoprolol Tartrate; Alendronate Sodium; Rocaltrol; Etizolam; Lansoprazole; Allopurinol; Adalat CC; Lipitor; Mobic; Dogmatyl
Possible Valtrex side effects in 74 year old female
Reported by a pharmacist from Japan on 2012-07-26
Patient: 74 year old female
Reactions: Thrombocytopenia, Leukopenia
Drug(s) suspected as cause:
Lipitor
Dosage: 5 mg, 1x/day
Administration route: Oral
Indication: Product Used FOR Unknown Indication
Start date: 2010-12-01
End date: 2011-01-01
Valtrex
Dosage: unk
Administration route: Oral
Indication: Product Used FOR Unknown Indication
Other drugs received by patient: Diflucan; Medrol; Mucosta
Possible Valtrex side effects in 71 year old female
Reported by a physician from Japan on 2012-07-25
Patient: 71 year old female, weighing 37.0 kg (81.4 pounds)
Reactions: Encephalopathy, CSF Cell Count Increased, Pyrexia, Speech Disorder, Dysstasia, Dizziness, Meningitis, Altered State of Consciousness
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Other drugs received by patient: Ceftriaxone
Possible Valtrex side effects in male
Reported by a physician from Japan on 2012-07-23
Patient: male
Reactions: Renal Failure, Encephalopathy, Altered State of Consciousness, Infection
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Possible Valtrex side effects in male
Reported by a physician from Japan on 2012-07-23
Patient: male
Reactions: Restlessness, Dehydration, Encephalopathy, Blood Creatinine Increased, Hallucination, Renal Failure Acute
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Aspirin
Administration route: Oral
Indication: Product Used FOR Unknown Indication
Valtrex
Dosage: 3000mg per day
Administration route: Oral
Indication: Herpes Zoster
Start date: 2012-03-09
End date: 2012-03-12
Other drugs received by patient: Furosemide; Urinorm; Calblock; Carvedilol; Vitamin B12; Plavix; Crestor; Azunol; Famotidine; Enalapril Maleate; Allopurinol; Anplag
Possible Valtrex side effects in male
Reported by a physician from Japan on 2012-07-23
Patient: male
Reactions: Renal Impairment, Blood Urea Increased, Pneumonia, C-Reactive Protein Increased, Pleural Effusion, Altered State of Consciousness, Blood Creatinine Increased
Adverse event resulted in: hospitalization
Drug(s) suspected as cause:
Valtrex
Dosage: 3000mg per day
Administration route: Oral
Indication: Herpes Zoster
Start date: 2012-05-19
End date: 2012-05-21
Valtrex
Dosage: 2000mg per day
Administration route: Oral
Start date: 2012-05-21
End date: 2012-05-23
Other drugs received by patient: Mucodyne; Famotidine; Magmitt; Pantosin; Unasyn; Tamsulosin HCL
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