Efavirenz 600 Mg Film-Coated Tablets
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Read all of this leaflet carefully before you start taking
this medicine.
• Keep this leaflet. You may need to read it again.
• If you have further questions, ask your doctor or pharmacist.
• This medicine has been prescribed for you. Do not pass it on to others. It may harm them, even if their symptoms are the same as yours.
• If any of the side effects gets serious, or if you notice any side effects not listed in this leaflet, please tell your doctor or pharmacist.
In this leaflet:
1. What Efavirenz is and what it is used for.
2. Before you take Efavirenz.
3. How to take Efavirenz.
4. Possible side effects.
5. How to store Efavirenz.
6. Further information.
1. WHAT EFAVIRENZ IS AND WHAT IT IS USED FOR
Efavirenz belongs to a class of antiretroviral medicines called non-nucleoside reverse transcriptase inhibitors (NNRTIs). It is an antiretroviral medicine that fights human immunodeficiency virus (HIV) infection by reducing the amount of the virus in blood.
Your doctor has prescribed efavirenz for you because you have HIV infection. Efavirenz taken in combination with other antiretroviral medicines reduces the amount of the virus in the blood.
2. BEFORE YOU TAKE EFAVIRENZ Do not take efavirenz:
• If you are allergic (hypersensitive) to efavirenz or any of the other ingredients of Efavirenz 600 mg Film-coated Tablets listed at the end of this leaflet. Contact your doctor or pharmacist for advice.
• If you have severe liver disease.
• If you are currently taking any of the following medicines:
* astemizole or terfenadine (used to treat allergy symptoms)
* bepridil (used to treat heart disease)
* cisapride (used to treat heartburn)
* ergot alkaloids (for example, ergotamine, dihydroergotamine, ergonovine, and methylergonovine) (used to treat migraine and cluster headaches)
• midazolam or triazolam (used to help you sleep)
• pimozide (used to treat certain mental conditions)
• St. John's wort (Hypericum perforatum) (a herbal remedy used for depression and anxiety).
If you are taking any of these medicines, tell your doctor immediately. Taking these medicines with efavirenz could create the potential for serious and for life-threatening side-effects or stop efavirenz from working properly.
Take special care with Efavirenz
• Efavirenz must be taken with other medicines that act against the HIV virus. If efavirenz is started because your current treatment has not prevented the virus from multiplying, another medicine you have not taken before must be started at the same time.
• You can still pass on HIV when taking this medicine, so it is important to take precautions to avoid infecting other people through sexual contact or blood transfer. This medicine is not a cure for HIV infection and you may continue to develop infections or other illnesses associated with HIV disease.
• You must remain under the care of your doctor while taking efavirenz.
Tell your doctor:
• If you have a history of mental illness, including depression, or of substance or alcohol abuse. Tell your doctor immediately if you feel depressed, have suicidal thoughts or have strange thoughts (see section 4, 'Possible side effects').
• If you have a history of convulsions (fits or seizures) or if you are being treated with anticonvulsant therapy such as carbamazepine, phenobarbital and phenytoin. If you are taking any of these medicines, your doctor may need to check the level of anticonvulsant medicine in your blood to ensure that it is not affected while taking efavirenz. Your doctor may give you a different anticonvulsant.
• If you have a history of liver disease, including active chronic hepatitis. Patients with chronic hepatitis B or C and treated with combination antiretroviral agents have a higher risk for severe and potentially life-threatening liver problems. Your doctor may conduct blood tests in order to check how well your liver is working or may switch you to another medicine. If you have severe liver disease, do not take efavirenz (see section 2, 'Do not take efavirenz').
Once you start taking efavirenz, look out for:
• Signs of dizziness, difficulty sleeping, drowsiness, difficulty concentrating or abnormal dreaming.These side effects may start in the first 1 or 2 days of treatment and usually go away after the first 2 to 4 weeks.
• Any signs of skin rash. If you see any signs of a severe rash with blistering or fever, stop taking efavirenz and tell your doctor at once. If you had a rash while taking another NNRTI, you may be at a higher risk of getting a rash with efavirenz.
• Any signs of inflammation or infection. In some patients with advanced HIV infection (AIDS) and a history of opportunistic infection, signs and symptoms of inflammation from previous infections may occur soon after anti-HIV treatment is started. It is believed that these symptoms are due to an improvement in the body's immune response, enabling the body to fight infections that may have been present with no obvious symptoms. If you notice any symptoms of infection, please tell your doctor immediately.
• Changes in body fat. Redistribution, accumulation or loss of body fat may occur in patients receiving combination antiretroviral therapy. Tell your doctor if you notice changes in your body fat.
• Bone problems. Some patients taking combination antiretroviral therapy may develop a bone disease called osteonecrosis (death of bone tissue caused by loss of blood supply to the bone). The length of combination antiretroviral therapy, corticosteroid use, alcohol consumption, severe immunosuppression, higher body
mass index, among others, may be some of the many risk factors for developing this disease. Signs of osteonecrosis are joint stiffness, aches and pains (especially of the hip, knee and shoulder) and difficulty in movement. If you notice any of these symptoms please inform your doctor.
Use in children
Efavirenz 600 mg Film-coated Tablets are not suitable for children weighing less than 40 kg. Other efavirenz formulations are available in the market for these patients.
Taking other medicines
You must not take efavirenz with certain medicines.
These are listed under Do not take efavirenz, at the start of Section 2. They include some common medicines and a herbal remedy (St. John's wort) which can cause serious interactions.
Please tell your doctor or pharmacist if you are taking or have recently taken any other medicines, including medicines obtained without a prescription and herbal remedies.
Efavirenz may interact with other medicines. As a result, the amounts of efavirenz or other medicines in your blood may be affected. This may stop the medicines from working properly, or may make any side effects worse.
In some cases, your doctor may need to adjust your dose or checkyour blood levels. It is important to tell your doctor if you are taking any of the following:
• Other medicines used for HIV infection:
* protease inhibitors: darunavir, indinavir, lopinavir/ ritonavir, ritonavir, ritonavir boosted atazanavir, saquinavir or fosamprenavir/saquinavir. Your doctor may consider giving you an alternative medicine or changing the dose of the protease inhibitors
* maraviroc
* a combination medicine containing efavirenz, emtricitabine and tenofovir, which is currently known as Atripla. Efavirenz should not be taken with Atripla since it contains efavirenz, the active ingredient of Efavirenz 600 mg Film-coated Tablets.
• Medicines used to treat bacterial infections, including tuberculosis and AIDS-related mycobacterium avium complex: clarithromycin, rifabutin, rifampicin. Your doctor may consider changing your dose or giving you an alternative antibiotic. In addition, your doctor may prescribe a higher dose of efavirenz.
• Medicines used to treat fungal infections (antifungal):
* Voriconazole. Efavirenz may reduce the amount of voriconazole in your blood and voriconazole may increase the amount of efavirenz in your blood. If you take these two medicines together, the dose of voriconazole must be increased and the dose of efavirenz must be reduced. You must check with your doctor first.
* Itraconazole. Efavirenz may reduce the amount of itraconazole in your blood.
* Posaconazole. Efavirenz may reduce the amount of posaconazole in your blood.
• Medicines used to treat convulsions/seizures (anticonvulsants): carbamazepine, phenytoin, phenobarbital. Efavirenz can reduce or increase the amount of anticonvulsant in your blood. Carbamazepine may make efavirenz less likely to work. Your doctor may need to consider giving you a different anticonvulsant.
• Medicines used to lower blood fats (also called statins): atorvastatin, pravastatin, simvastatin. Efavirenz can reduce the amount of statins in your blood. Your doctor will check your cholesterol levels and will consider changing the dose of your statin, if needed.
• Methadone (a medicine used to treat opiate addiction): your doctor may need to change your dose of methadone.
• Sertraline (a medicine used to treat depression): your doctor may need to change your dose of sertraline.
• Diltiazem or similar medicines (called calcium channel blockers): when you start taking efavirenz, your doctor may need to adjust your dose of the calcium channel blocker.
• Immunosuppressants such as cyclosporine, sirolimus, or tacrolimus (medicines used to prevent organ transplant rejection): when you start or stop taking efavirenz, your doctor will closely monitor your plasma levels of the immunosuppressant and may need to adjust its dose.
• Hormonal contraceptive, such as birth control pills, an injected contraceptive (for example, Depo-Provera), or a contraceptive implant (for example, Implanon): you must also use a reliable barrier method of contraception (see 'Pregnancy and breast-feeding'). Efavirenz may make hormonal contraceptives less likely to work. Pregnancies have occurred in women taking efavirenz while using a contraceptive implant, although it has not been established that the efavirenz therapy caused the contraceptive to fail.
• Warfarin (a medicine used to reduce clotting of the blood): your doctor may need to adjustyour dose of warfarin.
Taking efavirenz with food and drink
Taking efavirenz on an empty stomach, may reduce the undesirable effects.
Pregnancy and breast-feeding
Women should not get pregnant during treatment with efavirenz and for 12 weeks thereafter. Your doctor may require you to take a pregnancy test to ensure you are not pregnant before starting treatment with efavirenz.
If you could get pregnant while receiving efavirenz, you need to use a reliable form of barrier contraception (for example, a condom) with other methods of contraception including oral (pill) or other hormonal contraceptives (for example, implants, injection). Efavirenz may remain in your blood for a time after therapy is stopped. Therefore, you should continue to use contraceptive measures, as above, for 12 weeks after you stop taking efavirenz.
Tell your doctor immediately if you are pregnant or intend to become pregnant. If you are pregnant, you should take efavirenz only if you and your doctor decide it is clearly needed. Ask your doctor or pharmacist for advice before taking any medicine.
Serious birth defects have been seen in unborn animals and in the babies of women treated with efavirenz during pregnancy. If you have taken efavirenz during your pregnancy,your doctor may request regular blood tests and other diagnostic tests to monitor the development of your child.
You should not breastfeed your baby if you are taking efavirenz.
Driving and using machines
Efavirenz may cause dizziness, impaired concentration, and drowsiness. If you are affected, do not drive and do not use any tools or machines.
Important information about some of the ingredients of efavirenz
Each Efavirenz 600 mg Film-coated Tablet contains 128 mg of lactose monohydrate.
If you have been told by your doctor that you have an intolerance to some sugars, such as lactose, contact your doctor before taking this medicine.
For a full list of ingredients, see Section 6.
3. HOW TO TAKE EFAVIRENZ
Always take efavirenz exactly as your doctor has told you.
It is recommended that the tablet be swallowed whole with water. You should check with your doctor or pharmacist if you are not sure. Your doctor will give you instructions for proper dosing.
• Efavirenz is for oral use. Efavirenz is recommended to be taken on an empty stomach preferably at bedtime. This may make some side effects (for example, dizziness, drowsiness) less troublesome. An empty stomach is commonly defined as 1 hour before or 2 hours after a meal.
• The dose for adults is 600 mg once daily. However, if administered together with rifampicin, other efavirenz formulations may be used to give a total dose of 800 mg.
• The dose for efavirenz may need to be increased or decreased if you are also taking certain medicines (see 'Taking other medicines').
• Efavirenz must be taken every day.
• Efavirenz should never be used alone to treat HIV. Efavirenz must always be taken in combination with other anti-HIV medicines.
Use in children
The dose for children weighing 40 kg or more is 600 mg once daily.
Other formulations of efavirenz are available for patients who need some dose adjustment. You should refer to the accompanying package leaflet of suitable formulations for paediatric dosing (3 to 17 years).
If you take more efavirenz than you should
If you take too much efavirenz, contact your doctor or nearest emergency department for advice.
Keep the medicine container with you so that you can easily describe what you have taken.
If you forget to take efavirenz
Try not to miss a dose. If you do miss a dose, take the next dose as soon as possible, but do not take a double dose to make up for a forgotten dose. If you need help in planning the best times to take your medicine, ask your doctor or pharmacist.
If you stop taking efavirenz
When your efavirenz supply starts to run low, get more from your doctor or pharmacist. This is very important because the amount of virus may start to increase if the medicine is stopped for even a short time.The virus may then become harder to treat.
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
4. POSSIBLE SIDE EFFECTS
Like all medicines, efavirenz can cause side effects, although not everybody gets them. When treating HIV infection, it is not always possible to tell whether some of the unwanted effects are caused by efavirenz or by other medicines thatyou are taking at the same time, or by the HIV disease itself.
The most notable unwanted effects reported with efavirenz in combination with other anti-HIV medicines are skin rash and nervous system symptoms.
You should consult your doctor if you have a rash, since some rashes may be serious; however, most cases of rash disappear without any change to your treatment with efavirenz. Rash was more common in children than in adults treated with efavirenz.
The nervous system symptoms tend to occur when treatment is first started, but generally decrease in the first few weeks. In one study, nervous system symptoms often occurred during the first 1-3 hours after taking a dose.
If you are affected your doctor may suggest that you take efavirenz at bedtime and on an empty stomach. Some patients have more serious symptoms that may affect mood or the ability to think clearly. Some patients have actually committed suicide.These problems tend to occur more often in those who have a history of mental illness. Always notify your doctor immediately if you have these symptoms or any side effects while taking efavirenz.
The frequency of the side effects listed below is defined using the following conventions:
Very common: Common: Uncommon: Rare:
affects more than 1 use in 10 affects 1 to 10 users in 100 affects 1 to 10 users in 1,000 affects 1 to 10 users in 10, 000.
Tell your doctor if you notice any of the following side effects:
Common side effects:
• Abnormal dreams, difficulty concentrating, dizziness, headache, difficulty sleeping, drowsiness.
• Problems with coordination or balance.
• Stomach pain, diarrhoea, feeling sick (nausea), vomiting.
• Itching.
• Tiredness.
• Feeling worried, feeling depressed.
Uncommon side effects:
• Nervousness, forgetfulness, confusion, fitting (seizures), abnormal thoughts.
• Blurred vision.
• A feeling of spinning or tilting (vertigo).
• Pain in the abdomen (stomach) caused by inflammation of the pancreas.
• Allergic reaction (hypersensitivity) that may cause severe skin reactions (erythema multiforme, Stevens-Johnson syndrome).
• Yellow skin or eyes, itching, or pain in the abdomen (stomach) caused by inflammation of the liver.
• Breast enlargement in males.
• Angry behaviour, mood being affected, seeing or hearing things that are not really there (hallucinations), mania (mental condition characterised by episodes of overactivity, elation or irritability), paranoia, suicidal thoughts.
• Whistling, ringing or other persistent noise in the ears.
• Tremor (shaking).
• Flushing.
Rare side effects:
• Itchy rash caused by a reaction to sunlight.
• Liver failure, in some cases leading to death or liver transplant, has occurred with efavirenz.
• Most cases occurred in patients who already had liver disease, but there have been a few reports in patients without any existing liver disease.
Combination antiretroviral therapy may change your body shape, by changing the way body fat is distributed. You may lose fat from your legs, arms and face, gain fat around the abdomen (tummy) and other internal organs, get larger breasts or fatty lumps on the back of the neck ('buffalo hump').The cause and long-term health effects of these conditions are not yet known.
Combination antiretroviral therapy may also cause raised lactic acid and sugar in the blood, increased fat levels in the blood (hyperlipaemia) and resistance to insulin. Your doctor will test for these changes.
If any side effects get serious, or if you notice any side effects not mentioned in this leaflet, please tell your pharmacist or doctor.
5. HOW TO STORE EFAVIRENZ
Keep out of the reach and sight of children.
Do not use Efavirenz 600 mg Film-coated Tablets after the expiry date, which is stated on the blister or bottle after 'EXP'.The expiry date refers to the last day of that month.
This medicinal product does not require any special storage conditions.
The in-use shelf-life of the product when stored in HDPE bottles is 100 days.
Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to dispose of medicines no longer required.These measures will help to protect the environment.
6. FURTHER INFORMATION
What Efavirenz 600 mg Film-coated Tablets contains
The active substance is efavirenz. Each film-coated tablet contains 600 mg of efavirenz. The other ingredients are cellulose microcrystalline, croscarmellose sodium, hydroxypropyl cellulose, lactose monohydrate, silica colloidal anhydrous, magnesium stearate, hypromellose (E464), macrogol 400, titanium dioxide (E171), iron oxide yellow (E172) and iron oxide red (E172).
What Efavirenz 600 mg Film-coated Tablets looks like and contents of the pack
Efavirenz 600 mg Film-coated Tablets are yellow, capsule shaped biconvex beveled edge film-coated tablets marked with 'M' on one side and 'EV6' on the other side.
Efavirenz 600 mg Film-coated Tablets are available in blisters of 30, 60, 90, 100 film-coated tablets, perforated unit dose blisters of 30 x 1 film-coated tablets, and in plastic bottles of 30, 500 film-coated tablets.
Not all pack sizes may be marketed.
Marketing Authorisation Holder
Mylan, Potters Bar, Hertfordshire, EN6 1TL, United Kingdom.
Manufacturers
Generics [UK] Limited, Potters Bar, Hertfordshire, EN6 1TL, United Kingdom.
Gerard Laboratories, 35/36 Baldoyle Industrial Estate, Grange Road, Dublin 13, Ireland.
This leaflet was last revised in March 2013
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Mylan
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product Efavirenz 600mg Tab x30 component type Leaflet
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