Effect of food on fluvastatin
There are no significant differences in hypolipidemic action fluvastatin, given together with an evening meal or after 4 hours.
Because the fluvastatin does not interact with substances that are substrates for the isoenzyme CYP3A4, its interaction is not expected with grapefruit juice.
The effect of various drugs on fluvastatin
Fibric acid derivatives (fibrates) and nicotinic acid at lipid-lowering doses (≥1 g / day)
With the simultaneous administration of fluvastatin with bezafibrate, gemfibrozil,ciprofibrate or nicotinic acid in lipid-lowering doses (≥1 g / day), no clinically significant changes in the bioavailability of fluvastatin or other lipid-lowering agents have been observed. However, since simultaneous use of other HMG-CoA reductase inhibitors with any of the above drugs has been associated with an increased risk of myopathy, such combinations should be used with caution.
Itraconazole and erythromycin
Simultaneous administration of fluvastatin and such potent inhibitors of isoenzyme CYP3A4 as itraconazole and erythromycin has a slight effect on the bioavailability of fluvastatin. Since the isoenzyme CYP ZA4 does not play any significant role in fluvastatin metabolism, it can be expected that other inhibitors of this isoenzyme (ketoconazole, ciclosporin) will not affect the bioavailability of fluvastatin.
Fluconazole
The administration of fluvastatin to healthy volunteers who previously received fluconazole (inhibitor of isoenzyme CYP2C9), led to an increase AUC and maximum concentration (Cmax) of fluvastatin in blood plasma by 84% and 44%, respectively.Although no clinical evidence of a change in the safety profile of fluvastatin has been obtained in patients receiving the previous 4-day treatment with fluconazole, caution should be exercised when they are used together.
Cyclosporin
In clinical studies in patients after kidney transplantation who received stable maintenance doses of cyclosporine, there was no clinically significant increase in the bioavailability of fluvastatin, given in a daily dose of up to 40 mg. In another study, when the drug was administered at a dose of 80 mg patients after kidney transplantation, who received stable maintenance doses of cyclosporine, there was an increase AUC and CmOh fluvastatin in 2 times, in comparison with indicators of healthy volunteers. Despite the fact that the increase AUC and CmOh fluvastatin were not clinically significant, caution should be exercised when using this combination.
Bile acid sequestrants
Fluvastatin should be administered no earlier than 4 hours after taking the resin (eg, colestyramine) to avoid binding fluvastatin.
Rifampicin (rifampin)
When fluvastatin is prescribed to healthy volunteers who have previously received rifampicin, a decrease in the bioavailability of fluvastatin by about 50% was noted. Although the change in the activity of fluvastatin has not been shown to be effective for patients receiving long-term treatment with rifampicin (eg, for tuberculosis), nevertheless, appropriate fluvastatin dose adjustment may be required to achieve the desired hypolipidemic effect,
H2-gistamine receptor blockers and proton pump inhibitors
Simultaneous administration of fluvastatin with cimetidine, ranitidine or omeprazole increases the bioavailability of fluvastatin, which, however, has no clinical significance. Although studies on the interaction of fluvastatin with other drugs of these pharmacological groups have not been conducted, nevertheless, any significant effect of these drugs on the bioavailability of fluvastatin is unlikely.
Phenytoin
The effect of phenytoin on the pharmacokinetic parameters of fluvastatin is very slight, therefore dose adjustment fluvastatin is not required.
Cardiovascular drugs
There were no clinically significant pharmacokinetic interactions with the simultaneous use of fluvastatin with propranolol, digoxin, losartan, clopidogrel or amlodipine, so when using such combinations it is not required monitoring the concentration of these preparations in blood plasma and correction of their doses.
The influence of fluvastatina for other medicinal products
Cyclosporin
With the simultaneous use of fluvastatin in a dose of 80 mg with cyclosporine, the bioavailability of the latter was not noted.
Colchicine
There are no data on the pharmacokinetic interaction of fluvastatin and colchicine. However, with the use of fluvastatin together with colchicine, in some cases, myopathy developed (muscle pain, muscle weakness and rhabdomyolysis).
Phenytoin
Changes in the pharmacokinetic parameters of phenytoin with simultaneous application of fluvastatin are relatively small and clinically insignificant, so when assigning such combinations it is sufficient to conduct a generally accepted control of the concentration of phenytoin in the blood plasma.
Warfarin and other coumarin derivatives
In healthy volunteers, a single dose of fluvastatin and warfarin was not observedadverse effects on the concentration of warfarin in the blood plasma and prothrombin time. However, there are very few reports of bleeding and / or an increase in prothrombin time observed in patients treated with fluvastatin, while concurrent administration of warfarin or other coumarin derivatives. Therefore, in patients who are on therapy with warfarin or other coumarin derivatives, it is recommended to monitor prothrombin time in the event of initiating or canceling fluvastatin therapy, as well as in case of a change in its dose.
Hypoglycemic agents for oral administration
In patients with type 2 diabetes, who are treated with sulfonylureas (glibenclamide, tolbutamide), the addition of fluvastatin to therapy does not lead to clinically significant changes in the glycemic profile.
In 32 patients with type 2 diabetes treated with glibenclamide, a simultaneous application of fluvastatin 40 mg twice daily for 14 days showed an increase in the mean values of the maximum concentration of the drug in the blood plasma (CmOh), AUC and half-life (T1/2) of glibenclamide by approximately 50%, 69%, and 121%, respectively. Wherein, glibenclamide in a dose of 5 mg to 20 mg caused an increase in the average values of CmOh and AUC for fluvastatin by 44% and 51%, respectively. In this study, there was no change in the concentration of glucose, insulin and C-peptide. However, patients taking both fluvastatin and glibenclamide, appropriate monitoring is recommended when the fluvastatin dose is increased to 80 mg per day.
Clopidogrel
Fluvastatin has no effect on the antiplatelet activity of clopidrohydrol. Fluvastatin and clopidogrel can be used in combination without dose adjustment.