The use of CORONAL in children under 18 years old is contraindicated, since efficacy and safety have not been established.
Control of patients taking CORONAL should include measurement of heart rate and blood pressure (at the beginning of treatment - every day, then once every 3-4 months), conducting an electrocardiogram, determining the concentration of glucose in the blood in patients with diabetes mellitus (1 every 4 -5 months). In elderly patients it is recommended to follow the function of the kidneys (once every 4-5 months).
The patient should be taught how to calculate the heart rate and instructed about the need for medical advice at a heart rate of less than 50 beats per minute.
Before the start of treatment, it is recommended to perform an external respiration function in patients with a history of bronchopulmonary anamnesis.
Approximately in 20% of patients with angina pectoris beta-adrenoblockers are ineffective. The main causes are severe coronary atherosclerosis with a low threshold of ischemia (heart rate less than 100 beats per minute) and an increased end-diastolic volume of the left ventricle that disrupts the subendocardial blood flow.
In "smokers" the effectiveness of beta-blockers is lower.
Patients who use contact lenses should take into account that, on the background of treatment, tear fluid production can be reduced.
When used in patients with pheochroctomy, there is a risk of developing paradoxical arterial hypertension (unless an effective alpha-adrenoblockade has been previously achieved).
With thyrotoxicosis bisoprolol can mask certain clinical signs of tretoothicosis (eg, tachycardia). Abrupt withdrawal in patients with thyrotoxicosis is contraindicated, since it can strengthen symptoms.
In diabetes mellitus can mask tachycardia caused by hypoglycemia. Unlike nonselective beta-blockers, it does not actually increase insulin-induced hypoglycemia and does not delay the restoration of blood glucose to normal levels.
With the simultaneous administration of clonidine, his reception may be terminated only a few days after the CORONAL drug is discontinued.
It is possible to increase the severity of the reaction of hypersensitivity and the lack of effect from the usual doses of epinephrine against the background of a burdened allergological anamnesis.If it is necessary to conduct routine surgical treatment, the drug can be withdrawn 48 hours before the start of the general anesthesia. If the patient has taken the drug before the operation, he should choose a medicine for general anesthesia with a minimum negative inotropic effect.
Reciprocal activation of the vagus nerve can be eliminated by intravenous administration of atropine (1-2 mg).
Drugs that reduce the reserves of catecholamines (including, reserpine), can enhance the action of beta-blockers, so patients who take such combinations of drugs should be under constant medical supervision to detect a marked decrease in blood pressure or bradycardia.
Patients with bronchospastic diseases can be prescribed cardioselective beta-blockers in case of intolerance and / or ineffectiveness of other antihypertensive medications. Overdosing is dangerous by the development of bronchospasm.
In the case of an increased bradycardia (less than 50 beats / min) in elderly patients, a marked decrease in blood pressure (systolic blood pressure below 100 mm Hg) AV blockade, it is necessary to reduce the dose or stop treatment.
It is recommended to stop therapy with the development of depression.
The drug should be withdrawn before the study of blood and urine levels of catecholamines, normetanephrine and vanillin-mandelic acid; titers of antinuclear antibodies.
Features of the drug during the first admission or when it is canceled
You can not abruptly interrupt treatment because of the danger of developing the syndrome of "withdrawal" (severe arrhythmias and myocardial infarction). Abolition is carried out gradually, reducing the dose for 2 weeks or more (reduce the dose by 25% in 3-4 days).