Prospect: information for the user
Rifater coated tablets
Rifampicin/Isoniazid/Pyrazinamide
Read this prospect carefully before starting to take the medicine, as it contains important information for you
Contents of the package and additional information
Rifater is presented in blister with 100 coated tablets and is an antibiotic belonging to the group of antitubercular associations. Antibiotics stop the growth of bacteria that cause infections.
Antibiotics are used to treat bacterial infections and do not serve to treat viral infections such as the flu or the common cold.
It is important that you follow the instructions related to the dose, administration interval and duration of treatment indicated by your doctor.
Do not store or reuse this medication. If once the treatment is finished you have leftover antibiotic, return it to the pharmacy for proper disposal.Do not throw away the medications through the drain or in the trash.
Rifater is indicated in the intensive phase of short or ultra-short treatment of pulmonary tuberculosis.
During this phase, which usually lasts 2 months, Rifater is generally administered daily along with another antitubercular medication.
Once this phase is completed, it is appropriate to change treatment to a medication containing rifampicin and isoniazid.
- Combinations of saquinavir/ritonavir or elvitegravir/cobicistat (antiretroviral medications).
- Atazanavir, darunavir, fosamprenavir, tipranavir, rilpivirina, or dolutegravir/rilpivirina (antiviral medications).
- Nifedipino, nimodipino, nisoldipino, or nitrendipino (anti-hypertensive medications).
- Glecaprevir/pibrentasvir or elbasvir/grazoprevir (medications for hepatitis C).
- Voriconazol (antifungal medication).
- Artemetero/lumefantrina (antimalarial medication).
- BCG live attenuated culture (interferon).
Rifater should be discontinued if the cause of these symptoms cannot be established.
Use of Rifater with other medications
Rifater may modify the effects of many medications, so it is very important that you inform your doctor or pharmacist if you are taking, have taken recently, or may need to take any other medication, including those purchased without a prescription.
The interactions of Rifater when taken with other medications may be due to rifampicina, isoniazid, and pyrazinamide, which are the active principles of this medication.
Rifampicina increases the elimination of many medications from the body, which may result in a decrease in their activity. Among these medications are:
Medications for the treatment of blood clotting disorders: warfarin
Medications for the treatment of mental disorders: haloperidol
Medications for the treatment of fungal infections: caspofungina, fluconazol, itraconazol, ketoconazol
Medications for HIV infection: zidovudina, saquinavir, indinavir, efavirenz
Medications used as anesthetics: thiopental
In the case of taking any of these medications, your doctor may need to adjust your dose.
If you are taking paracetamol and rifampicina, you may increase the risk of liver damage.
When atovacuona and Rifater are taken together, a decrease in atovacuona concentrations and an increase in rifampicina concentrations are observed.
The simultaneous use of ketoconazol and rifampicina decreases the serum levels of both medications.
If you are taking enalapril (medication for the treatment of high blood pressure) at the same time as Rifater, your doctor will adjust the dose of enalapril, as rifampicina decreases its concentration in the blood and therefore its activity.
If you are taking systemic hormonal contraceptives, your doctor will advise you to replace them with a non-hormonal contraceptive method during treatment with Rifater, as it decreases its anticonceptive effect.
Antacids reduce the absorption of rifampicina, so you should take your daily dose of Rifater at least one hour before taking antacids.
The concomitant use of Rifater with a group of antiretroviral medications, non-nucleoside reverse transcriptase inhibitors such as etravirina, nevirapina, or any protease inhibitor (alone or combined with an antiviral called ritonavir) is not recommended.
The concomitant use of Rifater with maraviroc, another antiretroviral medication, is not recommended; if clinically justified, dose adjustment is required.
The concomitant use of rifampicina with other antibiotics that cause vitamin K-dependent coagulopathy (decrease in the blood's ability to coagulate) such as cefazolina (or other cefalosporins of the same group) should be avoided, as it may cause severe coagulation disorders that may lead to a fatal outcome (especially with high doses).
The concomitant use of Rifater with the combination saquinavir/ritonavir increases the risk of hepatotoxicity. Therefore, the concomitant use of Rifater with the combination saquinavir/ritonavir is contraindicated.
Isoniazid inhibits the metabolism of carbamazepine and phenytoin (medications for the treatment of epilepsy).
Acid para-aminosalicylic (medication used for the treatment of tuberculosis) increases the blood levels of isoniazid.
Interference with laboratory tests
Rifater modifies the results of some laboratory tests, such as:
- The determination of folates and vitamin B12 in blood,
- The bromosulftaleína test,
- The levels of bilirubin in blood,
- May interfere with the elimination of contrast agents used to examine the gallbladder.
Therefore, if necessary, these tests will be performed in the morning and before taking your dose of Rifater.
In patients treated with rifampicina, cases of falsely positive results for the presence of opiates in urine have been reported when the analysis was performed with a test called ICMS (Interacción Cinética de Micropartículas en Solución). With this in mind, it is recommended to use other techniques in these patients, such as gas chromatography and mass spectrometry.
Inform your doctor or pharmacist if you are pregnant and if you are planning or need to undergo abortion with mifepristone.
Taking Rifater with food, drinks, and alcohol
Isoniazid interacts with foods that contain a substance called tyramine and found in foods such as cheese and red wine. Similarly, if taken with foods that contain a substance called histamine (e.g., tuna or other tropical fish), an exaggerated response may occur with headache, sweating, palpitations, flushing, and decreased blood pressure. Therefore, your doctor will advise you not to take foods that contain tyramine or histamine during your treatment with Rifater.
If you are pregnant or breastfeeding, or if you think you may be pregnant, consult your doctor before using this medication.
This medication should not be taken during pregnancy.
Rifampicina, isoniazid, and pyrazinamide are excreted in breast milk, so you should not breastfeed your child during treatment.
Consult your doctor or pharmacist before taking any medication.
No data are available in humans on the long-term ability of Rifater to alter fertility.
Rifampicina may cause certain side effects that may interfere with driving and operating machinery. If you experience these side effects (difficulty breathing, nausea, vomiting, muscle weakness), do not drive or operate machinery.
Rifater contains saccharose
This medication contains saccharose. If your doctor has indicated that you have an intolerance to certain sugars, consult with them before taking this medication. Patients with diabetes mellitus should note that this medication contains 105 mg of saccharose per coated tablet.
Rifater contains sodium
This medication contains less than 23 mg of sodium (1 mmol) per tablet, which is essentially "sodium-free".
Follow exactly the administration instructions for Rifater indicated by your doctor. In case of doubt, consult your doctor or pharmacist again.
Remember to take your medication.
Your doctor will indicate your daily dose and the duration of your treatment. Do not suspend your treatment beforehand. The dosage is individual for you and may be modified by your doctor according to your response to treatment.
Swallow the tablets with a sufficient amount of liquid (a glass of water).
The absorption of Rifater is affected by food, therefore, to ensure proper absorption, you should take Rifater with an empty stomach, that is:
If you estimate that the action of Rifater is too strong or too weak, inform your doctor or pharmacist.
The recommended dose in adults varies according to weight and is:
Patients weighing less than 40 kg:3 coated tablets/day
Patients weighing 40-49 kg:4 coated tablets/day
Patients weighing 50-64 kg:5 coated tablets/day
Patients weighing 65 kg or more:6 coated tablets/day
This medication is not recommended for use in children due to different dosage needs.
If you take more Rifater than you should
Consult your doctor immediately or go to the nearest hospital emergency department accompanied by this leaflet.
After a massive intake of this medication, you can expect the appearance of nausea, vomiting, stomach pain, itching, headache, and progressive drowsiness; in case of suffering from a severe liver disease, it could lead to loss of consciousness. Vertigo, difficulty speaking, blurred vision, and visual hallucinations (bright colors and strange shapes) may also occur, as well as severe breathing difficulties and severe convulsions.
A temporary increase in liver enzymes and/or bilirubin may occur, which could lead to liver toxicity and increased urate concentrations in the blood.
Additionally, due to rifampicin, a reddish color may appear in: skin, urine, sweat, saliva, tears, and feces; the intensity of this color will vary according to the amount of medication taken. It may also cause permanent discoloration of soft contact lenses.
In case of overdose or accidental ingestion, consult the Toxicological Information Service. Phone: 91 5620420.
If you forget to take Rifater
Do not take a double dose to compensate for the missed doses.
If you interrupt treatment with Rifater
It is essential that you respect your doctor's instructions, as taking the treatment intermittently (less than 2 or 3 times a week) may cause severe allergic reactions. In case you interrupt treatment and restart it, you will do so with small doses that will be gradually increased.
Like all medicines, Rifater can cause side effects, although not everyone will experience them.
Due to Rifater
Side effectscommon(may affect up to 1 in 10 patients):
• Paradoxical reaction to the drug: during treatment, symptoms of tuberculosis may reappear or new symptoms may appear after initial improvement. Paradoxical reactions have been reported 2 weeks and up to 18 months after starting antituberculosis treatment. Paradoxical reactions are usually associated with fever, lymphadenitis (inflammation of lymph nodes), difficulty breathing, and cough. Patients with a paradoxical reaction to the drug may also experience headaches, loss of appetite, and weight loss.
Due to rifampicin:
Like all medicines, this medicine can cause side effects, although not everyone will experience them.
If any of the following serious side effects appear, stop taking Rifater and consult your doctor immediately (see section 2 - Warnings and precautions):
Your doctor will instruct you to stop taking rifampicin immediately and not to take this medicine again.
Side effectsvery common(may affect more than 1 in 10 patients):
Side effectscommon(may affect up to 1 in 10 patients):
Side effectsuncommon(may affect up to 1 in 100 patients):
Other side effectsfrequency unknown(cannot be estimated from available data)that may occur with rifampicin are:
Due to isoniazid:
Side effectsuncommon(may affect up to 1 in 100 patients):
Side effectsrare(may affect up to 1 in 1,000 patients):
Side effectsvery rare(may affect up to 1 in 10,000 patients):
Side effects offrequency unknown(cannot be estimated from available data):
Due to pyrazinamide::
Side effectsuncommon(may affect up to 1 in 100 patients):
Side effectsvery rare(may affect up to 1 in 10,000 patients):
Side effects offrequency unknown(cannot be estimated from available data):
Reporting of side effects
If you experience any type of side effect, consult your doctor or pharmacist, even if it is a possible side effect that does not appear in this leaflet.You can also report them directly through theSpanish System for the Pharmacovigilance of Medicines for Human Use:https://www.notificaram.es.By reporting side effects, you can contribute to providing more information on the safety of this medicine.
Keep this medication out of the sight and reach of children.
Do not store at a temperature above 25°C.
Do not use Rifater after the expiration date shown on the packagingafter CAD. The expiration date is the last day of the month indicated.
Medicines should not be disposed of through drains or in the trash. Dispose of the packaging and medicines you no longer need atthe SIGRE collection pointat the pharmacy. If in doubt, ask your pharmacist how to dispose of the packaging and medicines you no longer need. By doing so, you will help protect the environment.
Composition of Rifater coated tablets
The active principles are rifampicin, isoniazid and pyrazinamide. Each coated tablet contains 120 mg of rifampicin; 50 mg of isoniazid and 300 mg of pyrazinamide.
The other components are: povidone K-30, sodium carmelose, sodium lauryl sulfate, calcium stearate. Coating: sucrose, gum arabic, talc, povidone K-30, titanium dioxide (E-171), kaolin, magnesium carbonate, colloidal silica, aluminum hydroxide, iron oxide.
Appearance of the product and content of the packaging
Rifater is presented in the form of coated tablets of pale pink color, smooth, shiny, round and convex.
Each package contains 100 tablets in blisters.
The holder of the marketing authorization is:
sanofi-aventis, S.A.
C/ Rosselló i Porcel, 21
08016 Barcelona
Spain
The manufacturer responsible is:
Sanofi S.r.l.
Via Valcanello, 4
03012 Anagni (FR) Italy
Date of the last review of this leaflet:August 2024
The detailed information of this medicine is available on the website of the Spanish Agency of Medicines and Medical Devices (AEMPS)http://www.aemps.gob.es/.
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