The effectiveness and tolerability of bisoprolol may be affected by other concomitant medications. Such interaction is also possible in the case when two drugs are taken in a short time. It is necessary to inform the doctor about other medications taken, even if they are taken without prescription (OTC drugs).
Floktaphenin. In case of shock or hypotension due floctafenine, beta-blockers cause reduction compensatory cardiovascular reactions (joint use is contraindicated).
Sulphoprid. Due to the additive effect, it is possible to develop a pronounced bradycardia; high risk of ventricular arrhythmias (joint use contraindicated).
MAO inhibitors. Joint use is not recommended (with the exception of MAO type B inhibitors), since the likelihood of significant enhancement of antihypertensive action is high. A break in treatment between taking MAO inhibitors and bisoprolol should be at least 14 days.
Blockers of "slow" calcium channels: verapamil and, to a lesser extent, diltiazem. Due to the synergistic effect when combined with bisoprolol may slow down AV conductivity and a decrease in the contractility of the myocardium (this combination should be avoided).
During the treatment with Biprol, intravenous administration of verapamil or diltiazem and other antiarrhythmic drugs is contraindicated (the risk of developing asystole, AV blockade of high degree, severe bradycardia, severe arterial hypotension, increased heart failure).
Hypotensive means of central action (eg, clonidine, apraclonidine, alpha-methyldopa, moxonidine, rilmenidine). It is not recommended joint use with bisoprolol. Due to the synergism of the action and inhibition of sympathetic compensatory mechanisms, the risk of developing severe bradycardia, stopping the sinus node, AV conductivity, pronounced reduction in blood pressure, reduction in cardiac output. Abrupt cancellation, especially before bisoprolol cancellation, increases the risk of developing "ricochet" hypertension (see section "Special instructions").
Class I antiarrhythmics (eg, quinidine, disopyramide, lidocaine, phenytoin, flecainide, propafenone) when combined with bisoprolol reduce AV conductivity and increase the negative inotropic effect (strict clinical and electrocardiographic observation is required).
Antiarrhythmics III class (eg, amiodarone). It is possible to increase the negative effect on AV conductivity.
Blocks of "slow" calcium channels - dihydropyridine derivatives (eg, nifedipine, felodipine, amlodipine). The risk of a marked decrease in blood pressure and increased heart failure is increased.
Parasympathomimetics. Possible increased violations AV conduction and an increased risk of bradycardia.
Beta-blockers for topical use (eg, eye drops for the treatment of glaucoma) can enhance the systemic action of bisoprolol (lowering blood pressure, decreasing heart rate).
Insulin and hypoglycemic agents for oral administration. When combined, it is possible to increase the hypoglycemic effect. Symptoms of hypoglycemia, in particular tachycardia, can be masked or suppressed. This interaction is more typical for non-selective beta-blockers.
Means for inhalation general anesthesia, derivatives of hydrocarbons (e.g., chloroform, cyclopropane, halothane, methoxyflurane) increase the severity of cardiodepressive action and the likelihood of arterial hypotension (see section "Special instructions").
Cardiac glycosides. Increased risk of bradycardia, lengthening of time AV carrying out.
Nonsteroidal anti-inflammatory drugs (due to delay of sodium ions and blockade of prostaglandin synthesis by the kidneys), glucocorticosteroids and estrogens (due to the delay of sodium ions) weaken the antihypertensive effect of bisoprolol.
Beta-adrenomimetics (e.g., isoprenaline, dobutamine). Possible weakening of both drugs.
Adrenomimetics, affecting beta and alpha-adrenergic receptors (eg, norepinephrine, epinephrine). It is possible to enhance the vasoconstrictor effects of these agents, which occur with the participation of alpha-adrenergic receptors, with an increase in blood pressure. Such interaction is more likely with nonselective beta-blockers.
Diuretics, sympatholytics, hydralazine, Other drugs with potential effect on blood pressure. When combined, there may be an excessive decrease in blood pressure.
Tricyclic and tetracyclic antidepressants, sedatives, hypnotics and antipsychotic medicines (antipsychotics), ethanol. When combined, it is possible to excessively reduce blood pressure and increase the inhibition of the central nervous system.
Meflokhin. Increased risk of bradycardia (additive effect).
Sympathomimetics, xanthines (aminophylline, theophylline). There may be a mutual weakening of therapeutic effects.
Baclofen. Increased risk of hypotension.
Unhydrated alkaloids of ergot, ergotamine increase the risk of peripheral circulatory disorders.
Sulfasalazine increases the concentration of bisoprolol in the blood plasma.
Rifampicin shortens the half-life of bisoprolol (clinically insignificant).
Allergens used for immunotherapy, or extracts of allergens for skin tests can provoke severe systemic allergic reactions in patients receiving bisoprolol (see the "Caution" section).
Iodine-containing radiopaque diagnostic tools for intravenous administration increase the risk of developing anaphylactic reactions, refractory to treatment. Bisoprolol lengthens the action non-profitpandmuscle relaxants and anticoagulant effect coumarins.