Medicinal products that cause an elongation of the RT interval
Caution should be exercised while using ciprofloxacin, as well as other fluoroquinolones, in patients receiving medications that induce prolongation of the QT interval (for example, antiarrhythmic drugs of class IA and III, tricyclic antidepressants, macrolides, antipsychotics).
Formation of chelate compounds
Simultaneous administration of tablet forms of ciprofloxacin and cation-containing preparations, mineral supplements containing calcium, magnesium, aluminum, iron, sucralfate, antacids, polymeric phosphate compounds (sevelamer, lanthanum carbonate) and preparations with a large buffer capacity (such as didanosine tablets) containing magnesium, aluminum or calcium, reduces the absorption of ciprofloxacin. In such cases ciprofloxacin should be taken or in 1-2 hours before, or after 4 hours after reception of these drugs.
This restriction does not apply to drugs belonging to the class of H2-histamine receptor blockers.
Admission of Poverty and Dairy Products
Ciprofloxacin and dairy products or beverages enriched with minerals (milk, yogurt, calcium-fortified orange juice) should be avoided at the same time, as the absorption of ciprofloxacin may decrease. However, calcium, which is part of other foods, does not significantly affect the absorption of ciprofloxacin.
Omeprazole
With the combined use of ciprofloxacin and omeprazole, there may be a slight decrease in Cmax in the plasma and a decrease in the area under the pharmacokinetic curve "concentration-time" (AUC).
Theophylline
Simultaneous use of ciprofloxacin and preparations containing theophylline, can cause an undesirable increase in the concentration of theophylline in the blood plasma and, accordingly, the occurrence of theophylline-induced adverse events; in very rare cases, these adverse events can be life threatening to the patient. If the simultaneous use of these two drugs is necessary, it is recommended that a continuous control of the concentration of theophylline in the blood plasma and, if necessary, reduce the dose of theophylline.
Other xanthine derivatives
Simultaneous use of ciprofloxacin and caffeine or pentoxifylline (oxpentifylline) may lead to an increase in the concentration of xanthine derivatives in the blood serum.
Nonsteroidal anti-inflammatory drugs
The combination of very high doses of quinolones and some non-steroidal anti-inflammatory drugs (excluding acetylsalicylic acid) can provoke convulsions.
Cyclosporin
With the simultaneous use of ciprofloxacin and drugs containing ciclosporin, it was observed
a transient transient increase in the concentration of creatinine in the blood plasma. In such cases, the concentration of creatinine in the blood should be determined twice a week.
Oral hypoglycemic agents
With the simultaneous use of ciprofloxacin and oral hypoglycemic agents, mainly sulfonylureas (for example, glibenclamide, glimepiride), the development of hypoglycemia may be due to the increased effect of oral hypoglycemic agents.
Probenecid
Probenecid slows the rate of excretion of ciprofloxacin by the kidneys. Simultaneous use of ciprofloxacin and preparations containing probenecid, leads to an increase in the concentration of ciprofloxacin in the blood serum.
Phenytoin
With the simultaneous use of ciprofloxacin and phenytoin, there was a change (increase or decrease) in the content of phenytoin in the blood plasma. It is recommended to monitor phenytoin therapy in patients taking both drugs, including the determination of phenytoin in the blood plasma.
Methotrexate
With the simultaneous use of methotrexate and ciprofloxacin, the renal tubular transport of methotrexate may be slowed, which may be accompanied by an increase in the concentration of methotrexate in the blood plasma. This may increase the likelihood of side effects of methotrexate.In this regard, for patients receiving concomitant therapy with methotrexate and ciprofloxacin, careful monitoring must be established.
Tizanidine
As a result of a clinical study involving healthy volunteers with simultaneous use of ciprofloxacin and drugs containing tizanidine, an increase in the concentration of tizanidine in blood plasma: an increase in Cmax in 7 times (from 4 to 21 times), increase in AUC by 10 times (from 6 to 24 times). With increasing tizanidine concentration in the blood serum, hypotensive and sedative side effects are associated. Thus, the simultaneous use of ciprofloxacin and preparations containing tizanidine, is contraindicated.
Duloxetine
Clinical studies have shown that the simultaneous use of duloxetine and potent inhibitors of the CYP450 1A2 isoenzyme (such as fluvoxamine) can lead to an increase in AUC and Cmax duloxetine. Despite the lack of clinical data on the possible interaction with ciprofloxacin, it is possible to foresee the likelihood of such interaction with the simultaneous use of ciprofloxacin and duloxetine.
Ropinirole
The simultaneous use of ropinirole and ciprofloxacin, a moderate inhibitor of the isoenzyme CYP450 1A2, leads to an increase in Cmax and AUC of ropinirole by 60% and 84%, respectively. It is necessary to control the adverse effects of ropinirole during its joint use with ciprofloxacin and for a short time after the completion of the combination therapy.
Lidocaine
In a study on healthy volunteers, it was found that the simultaneous use of drugs containing lidocaine, and ciprofloxacin, a moderate inhibitor of the isoenzyme CYP450 1A2, leads to a decrease in clearance of lidocaine by 22% with its intravenous administration. Despite the good tolerability of lidocaine, simultaneous use with ciprofloxacin may increase the side effects due to interaction.
Clozapine
With the simultaneous administration of chlamydia and ciprofloxacin at a dose of 250 mg for 7 days, an increase in serum concentrations of chlamydia and N-desmethylclozapine by 29% and 31%, respectively. It is necessary to monitor the patient's condition and, if necessary, to correct the dosage regimen is chicken when combined with ciprofloxacin and for a short time after the completion of the combination therapy.
Sildenafil
With the simultaneous use in healthy volunteers of ciprofloxacin at a dose of 500 mg and sildenafil at a dose of 50 mg, there was an increase in Cmax and AUC sildenafil in 2 times. In this regard, the application of this combination is possible only after the evaluation of the benefit / risk ratio.
Antagonists of vitamin K
The combined use of ciprofloxacin and vitamin K antagonists (eg, warfarin, acenocoumarol, fenprocumone, fluindone) may lead to an increase in their anticoagulant effect. The magnitude of this effect may vary depending on the concomitant infections, age and general condition of the patient, so it is difficult to assess the effect of ciprofloxacin on increasing the international normalized ratio (INR). It is often enough to monitor INR during joint use of ciprofloxacin and vitamin K antagonists, and also for a short time after the completion of combination therapy.