Aciclovir belongs to a group ofmedicines called “anti-virals”. Itworks by stopping the production ofthe virus that causes herpes andshingles.Aciclovir does not get rid of the virusfrom your body. There is no evidence that thismedicine is addictive. This medicine is not expected toaffect your ability to drive a car oroperate machinery, but make sureyou know how it affects you beforedriving.
When you must not take itDo not take this medicine if:
• You have had an allergicreaction to aciclovir, valaciclovir or any of theingredients listed at the end ofthis leaflet. Symptoms of an allergic reactionmay include shortness of breath,wheezing or difficulty breathing;swelling of the face, lips, tongue,throat or other parts of the body,rash, itching or hives on the skin.
• The expiry date (EXP) printed onthe pack has passed.
• The packaging is torn, showssigns of tampering or it does notlook quite right.
Before you start taking thismedicine, tell your doctor if:
1. You have allergies to:
• any other medicines
• any other substances, such asfoods, preservatives or dyes.
2. You have or have had anymedical conditions, especially thefollowing:
• kidney or liver problems
• neurological disorders such asmuscle weakness, paralysis,seizures, confusion, etc
• altered electrolytes (salts) in yourbody
• lack of oxygen in your blood
• severe side effects from acytotoxic (anti-cancer) medicine.
3. You are currently pregnant or youplan to become pregnant. Yourdoctor will discuss the risks andbenefits involved.
4. You are currently breastfeedingor you plan to breastfeed. Yourdoctor will discuss the risks andbenefits involved.
5. You are planning to have surgeryor an anaesthetic.
6 .You are currently receiving orare planning to receive dentaltreatment.
7. You are taking or are planning to take any other medicines. Thisincludes vitamins and supplements that are available from your pharmacy, supermarket or health food shop.
Some medicines may interact withaciclovir . These include:
• probenecid, a medicinecommonly used to treat gout
• diuretics, also called fluid tablets
• interferon, used to treat multiplesclerosis, hepatitis, leukaemia, Hodgkin’s lymphoma and otherdiseases
• methotrexate given by injectioninto the spine to treat cancer andleukaemia
• cimetidine, used for stomachproblems
• mycophenolate mofetil, used bypeople with organ transplants. If you are taking any of these youmay need a different dose or youmay need to take different medicines.Other medicines not listed abovemay also interact with aciclovir.
Things you must do
Drink plenty of fluids. If you feel that your condition is notimproving or is getting worse, seeyour doctor.
Tell your doctor that you are taking this medicine if:
• you are about to be started on anynew medicine
• you are pregnant or are planningto become pregnant
• you are breastfeeding or areplanning to breastfeed
• you are about to have any bloodtests
• you are going to have surgery orare going into hospital. Your doctor may occasionally dotests on your blood or urine to checkfor side effects and see how yourkidneys are working. Go to yourdoctor regularly for a check-up. Tell any other doctors, dentists andpharmacists who are treating you that you take this medicine.
Things you must not do
Do not:
• Give this medicine to any one else, even if their symptoms seem similar to yours
• Take your medicine to treat anyother condition unless yourdoctor or pharmacist tells you to
• Stop taking your medicine, orchange the dosage, without firstchecking with your doctor. Things to be careful of Genital herpes can be caught from, orspread to, your partner during sexualactivity. It is important to remember that this medicine will not keep youfrom spreading herpes to others. Be careful when driving or operatingmachinery until you know how this medicine affects you.
Tell your doctor or pharmacist ifyou notice any of the following and they worry you.
This list includes the more common side effects. Mostly, these are mild:
• Stomach problems such as nausea (feeling sick), vomiting (beingsick), diarrhoea, constipation,stomach pain
• Changes in taste sensation, loss ofappetite, weight loss
• Dizziness/giddiness or headache
• Difficulty sleeping
• Mild skin reactions (e.g. rash,itching, hives, overreaction to thesun)
• Increased hair loss
• Weakness, fatigue, lack ofenergy, tiredness
• Aching, leg pains, muscles pains,joint pain, muscle cramps
• Menstrual problems.
Tell your doctor as soon as possibleif you notice any of the following.
These may be serious side effects.You may need medical attention.
Most of these side effects are rare.
• confusion
• depression, agitation, irritability
• unusual thoughts or actions,hallucinations (seeing, feeling orhearing things that are not there)
• shakiness/trembling
• difficulty speaking
• uncoordinated movements, i.e.unsteady walking
• fever, sore throat, swollen glands
• blood problems (e.g. feeling tiredand weak, fever, frequentinfections, unusual bruising orbleeding or swelling aroundwounds)
• fluid retention
• eye problems (inflamed eye).
If you experience any of the following, STOP taking your medicine and contact your doctor immediately or go to the Accident and Emergency department at your nearest hospital. These are very serious side effects and are usually very rare.
You may need urgent medical attention or hospitalisation.
• Yellowing of the skin and/or eyes(jaundice) or other liver problems with a collection of symptoms which may include: mental confusion, drowsiness, restlessness, itching andunconsciousness
• Kidney problems e.g. too much ortoo little urine, or pain whenurinating, or pain in the kidneys
• Troubled breathing
• Chest pain, fast heart beat(palpitations)
• Convulsion (fits)
• Becoming unconscious or in acoma• Signs of serious allergic reaction(see below)
• Signs of a blood clot such as aswollen and painful area in yourleg, and swelling in your foot or ankle. Other side effects not listed abovemay occur in some patients.
Storage
Keep your medicine in its original packaging until it is time to take it. If you take your medicine out of its original packaging it may not keep well. Keep your medicine in a cool dry place where the temperature will staybelow 25°C. Do not store your medicine, or anyother medicine, in the bathroom ornear a sink. Do not leave it on awindow sill or in the car. Heat anddampness can destroy somemedicines.Keep this medicine where childrencannot reach it. A locked cupboard at least one-anda-half metres above the ground is agood place to store medicines.
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