Discontinuation of therapy Do not suddenly stop treatment, especially in patients with ischemic heart disease. The dose should be reduced gradually within two weeks. If necessary, simultaneous initiation of appropriate therapy to prevent angina attacks should be started.
Bronchial asthma and chronic obstructive pulmonary disease
In patients with mild asthma or COPD, treatment is started with a minimal dose.Preliminary exercise of functional respiratory tests. Symptomatic manifestations of bronchial asthma or COPD show the simultaneous use of bronchodilating agents.
In patients with bronchial asthma, an increase in airway resistance may be required, which requires a higher dose of beta2-adrenomimetics.
Chronic heart failure
Patients with compensated CHF who are treated with beta-blockers should begin treatment with minimal doses of the drug, gradually increasing the dose, under the supervision of a doctor.
Bradycardia
At a heart rate of less than 50-55 beats / min at rest and patients who have symptoms associated with bradycardia, it is necessary to reduce the dose of the drug.
Atrioventricular block of degree I
Given the negative dromotropic effect of beta-blockers, they should be administered with caution to patients with AV blockade of the I degree.
Angina pectoris
Beta-blockers can increase the frequency and duration of vasospastic episodes in patients with Prinzmetal angina. Beta1-selective adrenoblockers can be used for mild or mixed manifestationsPrinzmetal angina with simultaneous application of vasodilators.
Peripheral disorders blood circulation
In patients with impaired peripheral circulation or Reynaud's syndrome, beta-adrenoblockers may cause an exacerbation of the course of the disease.
Pheochromocytoma
Patients with pheochromocytoma should not be prescribed Lodose until treatment with alpha-blockers is performed. A thorough control of blood pressure is necessary.
Elderly patients
Treatment should be carried out under close monitoring of the patient's condition (see Water-electrolyte balance).
Diabetes
Patients taking Lodose should be warned about the possibility of hypoglycemia and the need for regular monitoring of blood glucose concentrations at the beginning of treatment.
Symptoms of marked decrease in glucose concentration (hypoglycemia) such as tachycardia, palpitations or increased sweating may be masked.
Psoriasis
Therapy with beta-blockers can aggravate the course of psoriasis. Bisoprolol can be assigned only if necessary.
Allergic reactions
In patients who have a history of anaphylactic reactions regardless of the cause of their occurrence, especially when using iodine-containing contrast agents, or with desensitizing therapy, treatment with beta-blockers may aggravate the occurrence of these reactions and cause the development of resistance to epinephrine (adrenaline) treatment in conventional doses.
General anesthesia
In general anesthesia, beta-adrenergic blockade reduces the likelihood of arrhythmia and myocardial ischemia during introductory anesthesia and intubation, and also in the postoperative period. Currently, it is recommended to continue therapy with beta-blockers and intraoperatively. An anesthesiologist should consider the risk of blockade of beta-adrenergic receptors because of the potential interaction with other drugs, which can cause bradyarrhythmia, suppression of reflex tachycardia, and a decrease in the reflex capacity to compensate for blood loss. If it is necessary to stop therapy with Lodose before surgical intervention, it should be done gradually,and complete 48 hours before the general anesthesia.
Thyrotoxicosis
In the treatment of bisoprolol, the symptoms of thyrotoxicosis can be masked.
Strict diet
Lodose should be used with caution to patients who follow a strict diet.
Combination with verapamil, diltiazem or bepridilom
Such combinations require careful monitoring of the patient's condition and ECG, especially in elderly patients and at the beginning of treatment.
Precautions associated with hydrochlorothiazide
In patients with impaired liver function, thiazide diuretics and their derivatives can cause hepatic encephalopathy. In this case, you must immediately stop taking the drug.
Water-electrolyte balance
With prolonged use of the drug Lodose, it is recommended to regularly monitor the content of blood serum electrolytes (especially potassium, sodium, calcium), creatinine and urea, serum lipids (cholesterol and triglycerides), uric acid and glucose.
Prolonged use of thiazide diuretics can lead to disruption of the water electrolyte balance, in particular hypokalemia and hyponatremia, as well as hypomagnesemia and hypochloraemia, and hypercalcemia.
The content of sodium in the blood plasma
Before the start of therapy and further regular monitoring of the sodium content in the blood is necessary. Taking diuretics can provoke hyponatraemia, in some cases with serious consequences.
Decreasing the sodium content at the beginning of treatment can be asymptomatic, therefore regular monitoring is needed, special attention is required by high-risk patients, for example, elderly patients, patients with cirrhosis of the liver.
The content of potassium in blood plasma
The greatest risk associated with taking thiazide and thiazide-like diuretics is loss of potassium, leading to hypokalemia (<3.5 mmol / l).
More frequent monitoring of potassium in the blood of high-risk patients, for example, elderly patients and / or malnourished and / or taking several medicines at the same time, as well as patients with coronary artery disease or heart failure, in which hypokalemia increases the risk of developing arrhythmia, cardiac glycosides toxicity. Patients with an increased QT interval, both congenital and acquired, are also at risk.Hypokalemia (as well as bradycardia) potentiates the development of severe arrhythmia, including tachycardia of the type "pirouette".
The first determination of the potassium content in blood plasma should be carried out during the first week of therapy with Lodose.
Calcium in the blood plasma
Thiazide diuretics can reduce the excretion of calcium by the kidneys, which leads to minor and temporary hypercalcemia. Significant hypercalcemia may be associated with undiagnosed hyperparathyroidism. Before the study of parathyroid function, treatment with thiazides should be discontinued.
The concentration of glucose in the blood
It is necessary to control the concentration of glucose in the blood in patients with diabetes mellitus, especially in the case of hypokalemia.
Uric acid
In patients with hyperuricemia, the risk of developing gout attacks is increased: the dose of the drug must be selected individually.
Kidney function
Thiazide diuretics are effective in normal or slightly reduced renal function (creatinine clearance less than 25 mg / ml or 220 μmol / L in adults). The creatinine clearance is calculated taking into account the patient's age, body weight and sex, using the Cockcroft equation. For example:
ClCr = (140 - age) x body weight / 0.814 x serum creatinine where: age (years) body weight (kg) serum creatinine (in micromol / l)
This calculation formula is applicable for elderly male patients.
For older female patients, the result should be multiplied by 0.85.
Hypovolemia in addition to the loss of fluid and sodium resulting from the use of diuretics at the beginning of therapy leads to a decrease in the glomerular filtration rate, which in turn leads to an increase in urea and creatinine in the blood serum in patients with normal renal function. Temporary impairment of kidney function occurs without consequences in patients with normal renal function. In patients with impaired renal function, exacerbation of existing disorders is possible.
Combination with other antihypertensive agents
If the drug is prescribed with another antihypertensive drug, a dose reduction is recommended, at least at the beginning of the treatment.
Photosensitivity
The use of thiazide diuretics can cause photosensitivity reactions. When such reactions occur, it is recommended to protect sensitive areas from sunlightor artificial UV radiation. In severe cases, treatment may be discontinued.
Myopia (nearsightedness) and angle-closure glaucoma
Hydrochlorothiazide, as sulfanilamide, can cause idiosyncratic reactions, manifested as acute short-term myopia and acute closed-angle glaucoma. Symptoms include a sharp decrease in visual acuity or pain in the eye and usually occur between a few hours and a few weeks from the start of the drug. The absence of treatment for an angle-closure glaucoma can lead to irreversible loss of vision. The first step in treatment is to stop taking hydrochlorothiazide as soon as possible. If intraocular pressure remains uncontrolled, surgical or surgical treatment may be required. The risk factor for the development of angle-closure glaucoma is the allergic reactions to sulfanylamide derivatives or penicillin in the anamnesis.
Precautions associated with bisoprolol and hydrochlorothiazide
Athletes
Athletes should be informed that the drug contains active substances that can give positive results in doping tests.