くすりのしおり

Internal
Revised: 9/2017

The information on this sheet is based on approvals granted by the Japanese regulatory authority. Approval details may vary by country. Medicines have adverse reactions (risks) as well as efficacies (benefits). It is important to minimize adverse reactions and maximize efficacy. To obtain a better therapeutic response, patients should understand their medication and cooperate with the treatment.
Brand name :
Valtrex Tablets 500
 Active ingredient:
Valaciclovir hydrochloride
 Dosage form:
white to faintly yellowish white tablet, major axis: 18.5 mm, minor axis: 7.3 mm, thickness: 6.1 mm
 Print on wrapping:
VALTREX 500mg, GSK, バルトレックス 500mg, GX CF1, 抗ウイルス薬

Effects of this medicine

This medicine suppresses the increase of viruses by inhibiting virus DNA replication.
It is usually used to treat herpes simplex, herpes zoster, chickenpox and as a suppression of onset of herpes simplex virus infection associated with hematopoietic stem cell transplantation and recurrence of genital herpes.

Before using this medicine, be sure to tell your doctor and pharmacist

  • If you have previously experienced any allergic reactions (itch, rash, etc.) to any medicines.
    If you have renal disorder.
    If you are on dialysis.
  • If you are pregnant or breastfeeding.
  • If you are taking any other medicinal products. (Some medicines may interact to enhance or diminish medicinal effects. Beware of over-the-counter medicines and dietary supplements as well as other prescription medicines.)

Dosing schedule (How to take this medicine)

  • Your dosing schedule prescribed by your doctor is ((        to be written by a healthcare professional))
  • [Adults]
    Herpes simplex: In general, for adults, take 1 tablet (500 mg of valaciclovir) at a time, twice a day.
    Suppression of onset of herpes simplex virus infection (herpes simplex) associated with hematopoietic stem cell transplantation: In general, for adults, take 1 tablet (500 mg) at a time, twice a day from 7 days prior to hematopoietic stem cell transplantation to 35 days after transplantation.
    Herpes zoster: In general, for adults, take 2 tablets (1,000 mg) at a time, 3 times a day.
    Chickenpox: In general, for adults, take 2 tablets (1,000 mg) at a time, 3 times a day.
    Suppression of recurrent genital herpes: In general, for adults, take 1 tablet (500 mg) at a time, once a day. The dosage or frequency of doses may be adjusted according to the symptoms.
    [Children]
    Herpes simplex: In general, for children who weigh more than 40 kg, take 1 tablet (500 mg of valaciclovir) at a time, twice a day.
    Suppression of onset of herpes simplex virus infection (herpes simplex) associated with hematopoietic stem cell transplantation: In general, for children who weigh more than 40 kg, take 1 tablet (500 mg) at a time, twice a day from 7 days prior to hematopoietic stem cell transplantation to 35 days after transplantation.
    Herpes zoster: In general, for children who weigh more than 40 kg, take 2 tablets (1,000 mg) at a time, 3 times a day.
    Chickenpox: In general, for children who weigh more than 40 kg, take 2 tablets (1,000 mg) at a time, 3 times a day.
    Suppression of recurrent genital herpes: In general, for children who weigh more than 40 kg, take 1 tablet (500 mg) at a time, once a day. The dosage or frequency of doses may be adjusted according to the symptoms.
    In any case, the dosage or frequency of doses may differ according to the underlying disease. Strictly follow the instructions.
  • If you miss a dose, take the missed dose as soon as possible. However, if it is almost time for the next dose, skip the missed dose and follow your regular dosing schedule. You should never take two doses at one time.
  • If you accidentally take more than your prescribed dose, consult with your doctor or pharmacist.
  • Do not stop taking this medicine unless your doctor instructs you to do so.

Precautions while taking this medicine

  • Please take a larger amount of water than usual while you are on this medicine. However, if you have been instructed to restrict fluid intake, please consult with your doctor or pharmacist.
  • This medicine may cause decreased consciousness including sleepiness. Pay close attention when driving a car or operating dangerous machinery. Patients with renal dysfunction are more susceptible to consciousness disorder, so avoid operating dangerous machinery if instructed to do so by your doctor.

Possible adverse reactions to this medicine

The most commonly reported adverse reactions include headache, decreased consciousness including sleepiness, somnolence, nausea, vomiting, diarrhea, constipation, abdominal pain, abdominal discomfort, hives, rash, itch and photosensitivity. If any of them occurs, consult your doctor or pharmacist.
The symptoms described below are rarely seen as initial symptoms of the adverse reactions indicated in brackets. If any of these symptoms occur, stop taking this medicine and see your doctor immediately.
  • respiratory distress, swelling of eyelids/lips/tongue, palpitation [anaphylaxis shock, anaphylaxis]
  • fever, bleeding tendency, general malaise [blood disorder including pancytopenia/agranulocytosis]
  • decreased urine output, edema, general malaise [acute renal failure]
  • coma, hallucination, convulsion [neuropsychiatric symptom]
  • conjunctival hyperemia, erythema with edema on the center, erosions of oral or pubic mucosa [toxic epidermal necrolysis, muco-cutaneo-ocular syndrome]
The above symptoms do not describe all the adverse reactions to this medicine. Consult with your doctor or pharmacist if you notice any symptoms of concern other than those listed above.

Storage conditions and other information

  • Keep out of reach of children. Store away from direct sunlight, heat and moisture.
  • Discard the remainder. Do not store them.

For healthcare professional use only : Day Month Year

For further information, talk to your doctor or pharmacist.

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