Razo, 30 pcs., 20 mg, enteric-coated tablets

Razo®

Cytochrome 450 system

Rabeprazole, like other proton pump inhibitors (PPIs), is metabolized by the cytochrome P450 (CYP450) system in the liver. In
vitro
studies with human liver microsomes have shown that rabeprazole is metabolized by the isoenzymes CYP2C19 and CYP3A4.

Studies in healthy volunteers have shown that rabeprazole has no pharmacokinetic or clinically significant interactions with drugs that are metabolized by the cytochrome P450 system, warfarin. phenytoin, theophylline and diazepam (regardless of whether patients are extensive or poor metabolizers of diazepam).

A study of combination therapy with antibacterial drugs was conducted. This four-way crossover study involved 16 healthy volunteers who received rabeprazole 20 mg. 1000 mg amoxicillin. 500 mg clarithromycin or a combination of these three drugs (RAK - rabeprazole, amoxicillin, clarithromycin). AUC and Cmax values ​​for clarithromycin and amoxicillin were similar when combination therapy was compared with monotherapy. AUC and Cmax for rabeprazole increased by 11% and 34%. respectively, and for 14-hydroxy-clarithromycin (the active metabolite of clarithromycin), AUC and Cmax increased by 42% and 46%, respectively, for combination therapy compared with monotherapy. This increase in exposure rates for rabeprazole and clarithromycin was not considered clinically significant.

Interactions due to inhibition of gastric acid secretion

Rabeprazole provides a stable and long-lasting suppression of gastric juice secretion. Thus, interactions may occur with substances for which absorption is pH dependent. When taken simultaneously with rabeprazole, the absorption of ketoconazole is reduced by 30%, and the absorption of digoxin is increased by 22%. Therefore, some patients should be monitored to determine whether dose adjustments are necessary when rabeprazole is coadministered with ketoconazole, digoxin, or other drugs for which absorption is pH dependent.

Atazanavir

When atazanavir 300 mg/ritonavir 100 mg was coadministered with omeprazole (40 mg once daily) or atazanavir 400 mg with lansoprazole (60 mg once daily) in healthy volunteers, a significant reduction in atazanavir exposure was observed. Absorption of atazanavir is pH dependent. Although concomitant use with rabeprazole has not been studied, similar results are expected for other proton pump inhibitors. Therefore, concomitant use of atazanavir with proton pump inhibitors, including rabeprazole, is not recommended.

Antacids

In clinical studies, antacids were used in conjunction with rabeprazole. No clinically significant interactions of rabeprazole with aluminum hydroxide gel or magnesium hydroxide were observed.

Eating

In a clinical study, no clinically significant interactions were observed when rabeprazole was administered with a low-fat meal. Taking rabeprazole simultaneously with a fat-enriched diet may slow down the absorption of rabeprazole by up to 4 hours or more, but Cmax and AUC do not change.

Cyclosporine

In
vitro experiments using
human liver microsomes showed that rabeprazole inhibits the metabolism of cyclosporine with an IC50 of 62 µmol, i.e. at a concentration 50 times the Cmax for healthy volunteers after 20 days of administration of 20 mg rabeprazole. The degree of inhibition is similar to that of omeprazole for equivalent concentrations.

Methotrexate

Based on adverse event reports, published pharmacokinetic studies, and retrospective analysis, it may be suggested that concomitant use of PPIs and methotrexate (primarily at high doses) may result in increased concentrations of methotrexate/or its metabolite hydroxymethotrexate and prolong the half-life. However, no specific drug interaction studies have been conducted between methotrexate and PPIs.

Razo, 30 pcs., 20 mg, enteric-coated tablets

Absorption.

Rabeprazole is rapidly absorbed from the intestine and its Cmax in plasma is reached approximately 3.5 hours after administration of a 20 mg dose. Changes in plasma Cmax and AUC values ​​of rabeprazole are linear in the dose range from 10 to 40 mg. Absolute bioavailability after oral administration of 20 mg (compared to intravenous administration) is about 52%. In addition, bioavailability does not change with repeated doses of rabeprazole. Neither the time of taking the drug during the day nor antacids affect the absorption of rabeprazole. Taking the drug with fatty foods slows down the absorption of rabeprazole by 4 hours or more, but neither Cmax nor the degree of absorption changes.

Distribution.

In humans, the degree of binding of rabeprazole to plasma proteins is about 97%.

Metabolism.

Rabeprazole is metabolized in the body in two ways. A significant part of it is metabolized systemically by a non-enzymatic route with the formation of thioester derivatives. Rabeprazole is also metabolized in the liver via cytochrome P450 to form sulfonic and desmethyl derivatives. In healthy volunteers, T1/2 from plasma is about 1 hour (varies from 0.7 to 1.5 hours), and the total clearance is 3.8 ml/min/kg.

Excretion.

After a single oral dose of 20 mg of 14C-labeled rabeprazole, about 90% of the drug is excreted in the urine, mainly in the form of carboxylic acid thioester, its glucuronide and mercapturic acid derivatives. No unchanged drug is found in the urine. The remainder of the rabeprazole taken is excreted through the intestines. The total elimination is 99.8%.

Special patient groups

End stage renal failure.

In patients with stable end-stage renal disease who require maintenance hemodialysis (Cl creatinine <5 ml/min/1.73 m2), the elimination of rabeprazole is similar to that of healthy volunteers. AUC and Cmax in these patients were approximately 35% lower than in healthy volunteers. On average, T1/2 of rabeprazole was 0.82 hours in healthy volunteers, 0.95 hours in patients during hemodialysis and 3.6 hours after hemodialysis. The clearance of the drug in patients with kidney disease requiring hemodialysis was approximately 2 times higher than in healthy volunteers.

Chronic compensated cirrhosis.

Patients with chronic compensated liver cirrhosis tolerate rabeprazole 20 mg/day well, although AUC is doubled and Cmax is increased by 50% compared with these values ​​in healthy volunteers.

Elderly age.

In elderly patients, the elimination of rabeprazole is somewhat slower. After 7 days of rabeprazole 20 mg/day in elderly subjects, AUC was approximately twice as high and Cmax was increased by 60% compared to young healthy volunteers; There were no signs of drug accumulation.

CYP2C19 polymorphism.

In patients with slow metabolism via the CYP2C19 isoenzyme, after 7 days of taking rabeprazole at a dose of 20 mg/day, AUC increases by 1.9 times and T1/2 by 1.6 times compared with the same parameters in rapid metabolizers, while Cmax increases by 40%.

Special instructions for the use of the drug Razo

Before starting treatment, it is necessary to exclude the possibility that the patient has malignant neoplasms, since treatment with rabeprazole may mask symptoms and delay correct diagnosis. The drug is not prescribed to children, since there is no experience of its use in pediatric practice. Prescribe with caution to patients with severely impaired liver and kidney function. If drowsiness occurs, it is necessary to refrain from driving vehicles and/or operating other mechanisms that require increased concentration and speed of psychomotor reactions.

Razo

Razo ®

(lat. Razo ®) - a drug that normalizes gastric acidity, a proton pump inhibitor, a generic rabeprazole. A significant argument in favor of prescribing generics has always been their lower cost compared to the cost of the original drug, but they do not always have the proper biological, pharmaceutical and therapeutic equivalence to the original drug. Produced by Razo®, it combines the high clinical effectiveness of the original drug, safety of use, economic accessibility and high production standards in accordance with GMP criteria, registered by the FDA in the Orange Book in category AB (Kazyulin A.N., Goncharenko A.Yu).

Proton pump inhibitors (in particular, rabeprazole) are considered the most effective drugs for controlling symptoms and treating complications of GERD, such as reflux esophagitis and Barrett's esophagus (see Fifth Moscow Agreement // XIII Congress of the National Registry, March 12, 2013).

Dosage forms of Razo

Active substance Razo: rabeprazole.
Razo is available in two versions of enteric-coated tablets containing 10 and 20 mg of rabeprazole. Type of tablets: round, biconvex. 10 mg tablets are pink with the inscription “RB10” in black. 20 mg tablets are yellow, with the inscription “RB20” in red. Excipients of Razo tablets and their shells: mannitol, low-substituted hyprolose, heavy magnesium oxide, hypromellose (5 cps), sodium lauryl sulfate, talc, magnesium stearate, zein, triethyl citrate, methacrylic acid copolymer (type C), triethyl citrate, talc, hypromellose 6 cps , titanium dioxide, macrogol 400, shellac glaze, butanol, iron oxide dye (yellow, coaxial and black), isopropanol, butanol, propylene glycol, concentrated ammonia solution.

Indications for use Razo

Razo is indicated for:

• erosive reflux esophagitis
• nonerosive gastroesophageal reflux disease
• long-term maintenance therapy of gastroesophageal reflux disease
• Zollinger-Ellison syndrome
• peptic ulcer of the stomach and duodenum in the acute stage
• for the eradication of Helicobacter pylori
  in patients with diseases associated with Helicobacter, such as peptic ulcer of the stomach and duodenum, chronic gastritis, low-grade MALT lymphoma, prevention of stomach cancer (in justified cases) - as part of complex therapy

How to take Razo and dosage

Razo tablets are taken orally, whole, without chewing or splitting into parts. The duration of therapy and dose depend on the indications.

• Patients with gastric and duodenal ulcers in the acute stage, erosive reflux esophagitis, and with symptomatic treatment of gastroesophageal reflux disease take Razo 20 mg once a day, in the morning. Initially, the duration of therapy is determined for patients:
• with a stomach ulcer at 6 weeks
• with duodenal ulcer - 4 weeks
• with erosive reflux esophagitis - 4 weeks

Depending on the course of the disease, the doctor may double the duration of Razo therapy.

• For patients requiring long-term maintenance therapy, the daily dose can be set at 10 or 20 mg depending on the body’s response.
• Symptomatic treatment of GERD without esophagitis: daily dose - 10 mg for a month, then, if symptoms occur - 10 mg once a day, as required
• Zollinger-Ellison syndrome. The recommended starting dose of Razo for adult patients is 60 mg per day, with possible increases to 120 mg per day depending on the individual needs of the patient. A daily dose of up to 100 and a dose of up to 100 mg can be taken once a day. A large dose requires dividing it into two doses. The duration of treatment is determined by the patient's condition.

To treat Helicobacter pylori-associated diseases,
Razo and other rabeprazole drugs are used in combination with several antibiotics. For example, Razo at a dosage of 20 mg + clarithromycin preparation 500 mg + josamycin preparation 1000 mg per day or nifuratel 400 mg; this complex of drugs is prescribed for administration 2 times a day for 10-14 days. The use of double doses of Razo increases the effectiveness of three-component therapy (see Fifth Moscow Agreement // XIII Congress of the NOGR. March 12, 2013).

Use of Razo during pregnancy and breastfeeding

The FDA Fetal Risk Category for Razo (rabeprazole) in pregnant women is C* (animal studies have shown adverse effects on the fetus and there have been no adequate studies in pregnant women, but the potential benefits associated with the use of this drug in pregnant women may justify its use despite the risks involved).
During treatment with Razo, you should stop breastfeeding.

Note. *Previously, before the 2014 change, rabeprazole was category B.

Resources for Healthcare Professionals

Articles

• Kazyulin A.N., Goncharenko A.Yu. Choice of proton pump inhibitor during Helicobacter pylori eradication therapy. Maastricht V // Russian Journal of Journalism. — 2021. — No. 10. P. 712–717.
• Pakhomova I.G. A multimorbid patient with GERD and pathology of the cardiovascular system receiving antiplatelet therapy. Possibility of choosing a proton pump inhibitor using a clinical example. Medical advice. 2019;(14):10-16.

On the website GastroScan.ru in the “Literature” section there is a subsection “Rabeprazole”, containing medical articles devoted to the treatment of diseases of the gastrointestinal tract with drugs containing the active substance rabeprazole.

Video

On the website in the “Video” section there is a subsection “For Doctors”, containing video recordings of reports, lectures, webinars in various areas of gastroenterology for healthcare professionals.

Other medicines containing the active ingredient rabeprazole

In Russia, the following drugs with the active ingredient rabeprazole are registered for sale in pharmacies: Bereta, Zolispan, Zulbex, Noflux, Ontime, Pariet, Rabeloc, Rabeprazole-OBL, Rabeprazole-SZ, Rabiet, Hairabezol.
In the USA and several other countries, Pariet is sold under the brand name AcipHex.

In a number of countries - former republics of the USSR, medicines with the active substance rabeprazole produced by Macleods Pharmaceuticals Ltd, India, are registered, in particular: in Kazakhstan

- Rabemak 10 and Rabemak 20,
in Ukraine
- Rabimak (Ukrainian rabіmak), as well as Rabelok (Ukrainian Rabelok) produced by Cadila Pharmaceuticals, Ltd., India. In addition, in the pharmaceutical markets of countries - former republics of the USSR, there are a number of other drugs with the active substance rabeprazole, not registered in Russia, in particular: Barol-20 (Themis Laboratories Pvt. Ltd., India), Geerdin - powder for the preparation of solution for injection and enteric-coated tablets (Mepro Pharmaceuticals, India and Mili Healthcare Ltd, UK), Rabezol (Med-Interplast, India), Rabeprazol-health (Ukraine), Razol-20 (Biogenics Limited, India) and others.

general information

According to the pharmacological index, Razo belongs to the group “Proton pump inhibitors”.
According to ATC, it belongs to the group “Proton pump inhibitors” and has the code A02BC04. Manufacturer Razo - (Dr. Reddy's), India.

The drug Razo is included in the FDA Orange Book (Pakhomova I.G.), which lists drugs registered based on the results of confirmation of safety and effectiveness by the US Food and Drug Administration (FDA).

Available in pharmacies with a prescription.

Razo has contraindications, side effects and application features; consultation with a specialist is necessary

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Razo drug interactions

Rabeprazole causes a powerful and long-lasting decrease in the secretion of hydrochloric acid in the stomach, and therefore can affect the kinetics of drugs whose absorption depends on the acidity of the gastric contents. When taken simultaneously with ketoconazole, rabeprazole causes a decrease in its concentration in the blood plasma and increases the minimum concentration of digoxin. Therefore, patients taking these drugs in combination with Razo should be under medical supervision to determine the need for individual dosage adjustments.