With the simultaneous use of Valoserdin® with sedatives - strengthening the effect. Simultaneous use with neuroleptics and tranquilizers strengthens, and with stimulants of the central nervous system - weakens the effect of each of the components of the drug. Alcohol enhances the effects of Valoserdin® and can increase its toxicity. The presence of phenobarbital in the composition can induce liver enzymes, and this makes it undesirable to use it simultaneously with drugs that are metabolized in the liver, since their concentration, and accordingly the effectiveness will decrease as a result of more accelerated metabolism (indirect anticoagulants, antibiotics, sulfonamides, etc.).
Phenobarbital weakens the action of coumarin derivatives, glucocorticosteroids, griseofulvin, contraceptives for oral administration. Valoserdin® can increase the toxicity of methotrexate.