Aciclovir (RBX)™
Active ingredients: Aciclovir
Consumer medicine information
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What this medicine is used for
Adults,Treatment of first episode (primary or nonprimary) genital herpes and the management of recurrent episodes of genital herpes in certain patients.,Treatment of acute attacks of herpes zoster (shingles) when the duration of rash is less than 72 hours. The management of patients with advanced symptomatic human immunodeficiency virus (HIV) disease (CD4+ counts < 150 × 106/L).,Genital herpes,Initial episodes,The duration of viral shedding is reduced very significantly; the duration of pain and time to healing are also reduced. The promptness of initiation of therapy and/or the patients prior exposure to herpes simplex virus (HSV) may influence the degree of benefit from therapy.,Intravenous aciclovir should be considered in patients in whom prostration, CNS involvement or inability to take oral medication requires hospitalisation and initiation of more aggressive management. Aciclovir does not prevent the establishment of latency in initial episodes.,Recurrent episodes,Suppression. In patients with frequent recurrences, suppressive therapy prevents or reduces the frequency and/or severity of recurrences in a high proportion of patients. Abortive episodes (prodromal symptoms without vesicle formation) and occasional breakthrough episodes may, however, continue to occur during suppressive therapy.,Suppressive therapy is not considered appropriate for patients in whom attacks are mild, last for short periods and/or occur infrequently (e.g. less frequently than once a month).,Aciclovir is effective only during the period of intake and has no residual beneficial effect. It does not eradicate the body viral pool. Following cessation of therapy, the time to onset of recurrences, their frequency, severity and duration remain generally unaffected. Some patients may experience increased severity of the first episode following cessation of therapy.,The risk of inducing viral resistance and of potential long-term adverse effects (see Section 5.3 Preclinical Safety Data) should be weighed carefully before initiating suppressive therapy.,Asymptomatic cases of genital herpes are known to shed the virus with a high frequency. However, at present only limited data are available on the extent and frequency of viral shedding in patients receiving suppressive therapy. Therefore, if therapy with aciclovir tablets is being used in the prenatal period (see Section 4.6 Fertility, Pregnancy and Lactation, Use in pregnancy), it should not be assumed that viral shedding has ceased. Pregnancy should be managed according to considerations normally applicable to patients with genital herpes.,In view of the complex and variable natural history of genital herpes, suppressive therapy should be interrupted periodically to ascertain whether the disease has undergone spontaneous change in frequency or severity (see Section 4.2 Dose and Method of Administration).,Intermittent treatment. For certain patients, intermittent short-term treatment of recurrences is effective. Although the average patient would derive limited benefits from such treatment, a minority of patients who have experienced severe, prolonged recurrent episodes or recurrences complicated by eczema, burns or immunosuppression may experience more appreciable benefits. In those patients, intermittent treatment may be more appropriate than suppressive therapy when recurrences are infrequent.,Herpes zoster,In controlled trials aciclovir tablets were shown to reduce acute pain and rash progression in adult patients of all ages with herpes zoster in whom the duration of rash was less than 72 hours. Aciclovir tablets appeared to be relatively less effective in younger adults, in whom herpes zoster is generally a milder disease. In ophthalmic zoster, oral aciclovir has been shown to reduce the incidence of stromal keratitis and both the incidence and severity of anterior uveitis, but not other ocular complications or acute pain.,Note: In immunocompetent patients with very severe herpes zoster, immunocompromised patients, or in patients with impaired absorption from the gut, consideration should be given to intravenous dosing. Advanced symptomatic HIV disease,Studies have shown that oral aciclovir reduced mortality in patients with advanced HIV disease (CD4+ counts < 150 × 106/L). In addition, oral aciclovir provided effective prophylaxis for herpes virus disease. No significant effect was seen on the prophylaxis of cytomegalovirus (CMV) disease or Epstein-Barr virus (EBV) disease.
Source: ARTG
Storage conditions
- Shelf lifetime is 3 Years
- Store below 25 degrees Celsius
- Protect from Light; Protect from Moisture
Source: ARTG
How to use this medicine
Non-composite pack
This medicine contains one component only.
Component
- Tablet, uncoated
- Oral
- White to off-white, capsule shaped, biconvex tablets, with 'ACV' debossed on one side and '200' on the other side.
Source: ARTG
Images

Images © Medicines Information Pty Ltd.
Do I need a prescription?
These medicine packs are available from a pharmacist and requires a prescription. It is Schedule 4: Prescription Only Medicine.
- 50 tablets
- 90 tablets
Source: ARTG
Is this medicine subsidised?
This medicine is not listed on the Pharmaceutical Benefits Scheme (PBS). Talk to your pharmacist about how much it will cost.
Source: PBS
Reporting side effects
If you experience a side effect from this medicine, tell your doctor or pharmacist. Or report it directly to the TGA (Therapeutic Goods Administration).
You can report side effects to your doctor, or directly at Report an adverse event or safety problem (Opens in new tab)
Source: ARTG
Data sources
- Australian Health Thesaurus (AHT) (Opens in new tab) – Last updated on 3 August 2026
- Australian Medicines Terminology (AMT) (Opens in new tab) – Last updated on 3 August 2026
- Australian Register of Therapeutic Goods (ARTG) (Opens in new tab) – Last updated on 3 August 2026
- Pharmaceutical Benefits Scheme (PBS) (Opens in new tab) – Last updated on 3 August 2026
- Medicines Information Pty Ltd (Opens in new tab) – Last updated on 4 March 2026
Disclaimer
Healthdirect medicines information is not intended for use in an emergency. If you are suffering an acute illness, overdose, or emergency condition, call triple zero (000) and ask for an ambulance.
Reasonable care has been taken to provide accurate information at the time of creation. This information is not intended to substitute medical advice, diagnosis or treatment and should not be exclusively relied on to manage or diagnose a medical condition. Please refer to our terms and conditions (Opens in new tab).
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