Vortoxyxetin undergoes extensive metabolism in the liver, mainly due to oxidation catalyzed by the isoenzyme CYP2D6, and to a lesser extent isoenzymes CYP3A4/5 and CYP2C9 (see section "Pharmacological properties").
Possible effects of other drugs on the pharmacological action of vortioxetin
Irreversible non-selective MAO inhibitors
Because of the risk of serotonergic syndrome vortoxyxine it is contraindicated to use in combination with irreversible non-selective MAO inhibitors. Vortoxyxine can be appointed no earlier than 14 days after the cancellation of irreversible non-selective MAO inhibitors.
Vortoxyxine should be discontinued no less than 14 days before the onset of irreversible non-selective MAO inhibitors (see "Contraindications").
Reversible selective inhibitors of MAO A (moclobemide)
Simultaneous use of vortioxetine with reversible selective MAO A inhibitors, such as moclobemide, is contraindicated (see section "Contraindications"). In case of the proven need for simultaneous use, the drug to be added should be used in minimal doses and with careful clinical observation for the onset of serotonin syndrome (see section "Special instructions").
Reversible non-selective MAO inhibitors (linezolid)
Simultaneous use of vortoxyxine with a weak reversible nonselective MAO inhibitor, such as an antibiotic linezolid, is contraindicated (see section "Contraindications"). In case of the proven need for simultaneous use, the drug to be added should be used in minimal doses with careful clinical monitoring for the appearance of serotonin syndrome (see section "Special instructions").
Irreversible selective inhibitors of MAO B (selegiline, rasagiline)
Although the risk of serotonin syndrome with simultaneous use of vortoxyxine and selective MAO B inhibitors is lower,than with the simultaneous use of vortioxetin and selective MAO A inhibitors, the combined use of vortioxetin with irreversible MAO B inhibitors, such as selegiline or rasagiline should be carried out with care. In case of simultaneous use, careful monitoring of the patient for serotonin syndrome (see section "Special instructions") is necessary.
Serotonergic drugs
The simultaneous use of vortioxetine and other drugs with a serotonergic effect (eg tramadol, sumatriptan and other triptans) can lead to the development of serotonin syndrome (see section "Special instructions").
St. John's wort perforated
Simultaneous use of antidepressants with serotonergic effect with preparations containing St. John's Wort (Hypericum perforatum), can lead to an increase in the frequency occurrence of undesirable reactions, including serotonin syndrome (see section "Special instructions").
Drugs that reduce the threshold of convulsive readiness
Antidepressants with a serotonergic effect can reduce the threshold of convulsive readiness.Simultaneous use with drugs that reduce the threshold of convulsive readiness (for example, antidepressants (TCAs, SSRIs, SSRIs), neuroleptics (phenothiazines, thioxanthenes, butyrophenones), mefloquine, bupropion, tramadol) should be carried out with caution (see section "Special instructions"). .
ECT (electroconvulsive therapy)
Currently, the clinical experience of simultaneous use of vortioxetin and ECT is absent, therefore, with this application, care must be taken.
Inhibitor inhibitors CYP2D6
In the case of the use of vortoxyxine in a dose of 10 mg / day simultaneously with bupropion (a strong inhibitor of the isoenzyme CYP2D6) in a dose of 150 mg twice a day for 14 days in healthy subjects, the exposure of vortioxetine (AUC) has increased in 2,3 times. Undesirable reactions were more often observed with the addition of bupropion to current therapy with vortioxetine than with the addition of vortioxetine to current therapy with bupropion. Depending on the individual reaction of the patient, when a strong inhibitor of isoenzyme is added to the current therapy with vortioxetine CYP2D6 (e.g., bupropion, quinidine, fluoxetine, paroxetine) should consider the possibility of reducing the dose of vortioxetin (see section "Method of administration and dose").
Inhibitor inhibitors CYP3A4 and CYP2C9
The addition of vortioxetine 6 days after the initiation of ketoconazole at a dose of 400 mg / day (inhibitor of isoenzymes CYP3A4/5 and P-glycoprotein) or 6 days after the onset of fluconazole administration at a dose of 200 mg / day (inhibitor of isoenzymes CYP2C9, CYP2C19 and CYP3A4/5) in healthy subjects exposure (AUC) vortioxetin increased by 1.3 and 1.5 times, respectively. Correction of the dose is not required.
Interactions in patients with weak isoenzyme activity CYP2D6
Special studies of the use of vortioxetin simultaneously with strong inhibitors of isoenzyme CYP3A4 (such as itraconazole, voriconazole, clarithromycin, telithromycin, nefazodone, conivaptan and many HIV protease inhibitors) and isoenzyme inhibitors CYP2C9 (such as fluconazole and amiodarone) in patients with reduced isoenzyme activity CYP2D6 (see the section "Pharmacological properties") was not performed, nevertheless it can be expected that in these patients such use will lead to a more pronounced exposure of vortioxetine compared to the moderate effect described above.Taking a single dose of omeprazole 40 mg (inhibitor of isoenzyme CYP2C19) on the background of repeated doses of vortioxetin did not change the pharmacokinetics of the latter in healthy subjects.
Inductors of cytochrome P450
When taking a single dose of vortioxetin 20 mg 10 days after the initiation of rifampicin at a dose of 600 mg / day (inducer isoenzymes CYP broad spectrum) healthy subjects exposure (AUC) vortioxetin decreased by 72%. Depending on the individual response of the patient, when adding a strong inducer of cytochrome P450 isoenzymes of a wide spectrum (for example, rifampicin, carbamazepine, phenytoin) to the current therapy with vortioxetine, consideration should be given to the possibility of correcting the dose of vortioxetin (see the section "Dosing and Administration").
Alcohol
With the simultaneous administration of single doses of vortoxyxine (20 mg and 40 mg) and ethanol (0.6 g / kg), healthy subjects did not exhibit changes in the pharmacokinetics of vortioxetine or ethanol and significant cognitive impairment compared with placebo. However, during therapy with antidepressants, alcohol intake is not recommended.
Acetylsalicylic acid
Multiple administration of acetylsalicylic acid at a dose of 150 mg / day did not change the pharmacokinetics of multiple doses of vortioxetine in healthy subjects.
Potential effects of vortioxetin on the pharmacological action of other drugs
Anticoagulants and antiplatelet agents
There was no significant effect of vortioxetine compared with placebo on prothrombin parameters, the international normalized ratio (INR) or the ratio R-ZS-varfarin in blood plasma with simultaneous application of multiple doses of vortoxyxine with a fixed dose of warfarin in healthy subjects. Also, there was no significant inhibitory effect of vortioxetin on platelet aggregation and the pharmacokinetics of acetylsalicylic and salicylic acid in comparison with placebo with simultaneous use of acetylsalicylic acid at a dose of 150 mg / day after repeated doses of vortioxetine in healthy subjects. However, as with other serotonergic drugs, care should be taken when using vortoxyxine and oral anticoagulants or antiplatelet agents at the same time because of the potential risk of bleeding caused by pharmacodynamic interaction (see section "Special instructions").
Substrates of cytochrome P450
Research in vitro did not reveal in vortioxetine the ability to inhibit or induce isoenzymes of the cytochrome P450 system (see the section "Pharmacological properties").
After applying multiple doses of vortioxetine in healthy subjects, its inhibitory effect on the activity of cytochrome P450 isoenzymes CYP2C19 (omeprazole, diazepam), CYP3A4/5 (ethinyl estradiol, midazolam), CYP2B6 (bupropion), CYP2C9 (tolbutamide, S-varmarin), CYP1A2 (caffeine) or CYP2D6 (dextromethorphan).
Pharmacodynamic interactions were also not observed. There was no significant cognitive impairment compared with placebo when vortioxetin was used in combination with a single dose of diazepam 10 mg. There was no significant effect of vortioxetine in comparison with placebo on the level of sex hormones after its use in combination with a combined oral contraceptive (ethinyl estradiol 30 μg + levonorgestrel 150 μg).
Lithium, tryptophan
In healthy subjects, there were no clinically significant changes in the simultaneous use of lithium and multiple doses of vortioxetine. Nevertheless, due to the fact,that cases of increasing the effect of serotonergic antidepressants with simultaneous use with lithium or tryptophan have been described, the use of vortioxetin in combination with these drugs should be carried out with caution.