The following undesirable phenomena (AEs) are presented in accordance with the following grades of their incidence according to the classification of the World Health Organization: very often (> 1/10), often (> 1/100, <1/10), infrequently (> 1/1000, <1/100), rarely (> 1/10000, <1/1000), very rarely (<1/10000, including individual messages), unknown frequency (it is not possible to determine the incidence of AE from the available data).
In clinical AE studies, patients treated with irbesartan / hydrochlorothiazide for 6 months and one year or more were usually mild and transient, and their incidence was not related to the dose taken. The incidence of AEs also did not depend on the age, sex and race of the patients.
In placebo-controlled studies in patients receiving the combination
irbesartan / hydrochlorothiazide (the usual duration of treatment is 2-3 months),
discontinuation of treatment due to any clinical or laboratory AEs was
significantly less frequent in patients taking the combination
irbesartan / hydrochlorothiazide than in patients taking placebo.
BUT, observed with the combination of irbesartan / hydrochlorothiazide in
clinical trials in patients with AH
Impaired nervous system:
often: dizziness, headache;
infrequently: orthostatic dizziness.
Heart Disease:
infrequently: tachycardia, changes in the electrocardiogram.
Vascular disorders:
infrequently: excessive reduction of blood pressure, peripheral edema, in particular, edema of the lower extremities, "hot flashes" of blood to the skin of the face, syncopal conditions.
Disorders from the gastrointestinal tract:
often: nausea / vomiting;
infrequently: diarrhea, dryness of the oral mucosa, abdominal pain.
Disorders from the kidneys and urinary tract:
often: changes in frequency of urination.
Violations of the genitals and breast:
infrequently: sexual dysfunction (weakening of libido, erectile dysfunction).
General disorders and disorders at the site of administration:
often: increased fatigue;
infrequently: weakness.
Disturbances from the skin and subcutaneous tissues: infrequent: skin rash, itchy skin.
Disturbances from the musculoskeletal and connective tissue: infrequently: myalgia, bone pain, weakness in the extremities.
BUT, observed in placebo-controlled studies using irbesartan / hydrochlorothiazide combination as initial treatment in patients with severe and moderate AH
Initial treatment with irbesartan / hydrochlorothiazide
The combinations of irbesartan / hydrochlorothiazide, presented below, in clinical studies conducted in patients with AH of severe and moderate severity were similar to those described above, observed in previous clinical trials with AH.
In a clinical study with AH of moderate severity (mean diastolic blood pressure (DBP), in a sitting position of 90-110 mm Hg), the types and frequency of AE observed in patients treated with irbesartan / hydrochlorothiazide as a combination initial therapy were similar to the AE profile in patients who received initial treatment as monotherapy with irbesargan or hydrochlorothiazide. There were no cases of syncopal conditions in the combination therapy group, and in the monotherapy group with hydrochlorothiazide, one case of syncope was recorded.
The frequency of the above-mentioned AEs in combination with irbesartan / hydrochlorothiazide, monotherapy with irbesargan and hydrochlorothiazide monotherapy, respectively, was 0.9%, 0% and 0% for excessive reduction in blood pressure, 3.0%, 3.8%, and 1, 0% for dizziness, 5.5%, 3.8% and 4.8% for headache, 1.2%, 0% and 1.0% for hyperkalemia and 0.9%, 0% and 0 % - for hypokalemia.
The frequency of cancellation due to AEs in combination with irbesartan / hydrochlorothiazide, monotherapy with irbesartai and monotherapy with hydrochlorothiazide was 6.7%, 3.8% and 4.8%, respectively. In a clinical study conducted with severe AH (DBP in the "sitting" > 110 mm Hg. The overall picture of AE during 7 weeks of follow-up was similar in patients treated with irbesartan / hydrochlorothiazide as initial therapy, and in patients receiving initial therapy irbesartan. The frequency of the above AE for the combination irbesartan / hydrochlorothiazide and irbesartan was, respectively: 0% and 0% for the syncope, 0.6% and 0% for excessive blood pressure lowering, 3.6% and 4.0% for vertigo, 4.3% and 6.6% for headache, 0.2% and 0% for hyperkalemia and 0.6%, and 0.4% for hypokalemia, respectively.
The frequency of cancellation of treatment due to AEs when taking the combination irbesartan / hydrochlorothiazide and with monotherapy with irbesartan was 2.1% and 2.2%, respectively.
Laboratory and instrumental data
Clinically significant changes in the results of laboratory studies during controlled clinical trials of irbesartan / hydrochlorothiazide combination have not been revealed.
Experience of post-registration application
Irbesartan
As in the case of other ARA II, extremely rare cases of development of hypersensitivity reactions (angioedema, urticaria) were observed with monotherapy with irbesartan. In addition, with the post-marketing application of irbesartan, the following AEs were observed: vertigo, asthenia, hyperkalemia, jaundice, myalgia, increased functional hepatic test, hepatitis, ringing in the ears and impaired renal function, including cases of acute renal failure in patients at risk.
Hydrochlorothiazide
In monotherapy with hydrochlorothiazide, the following AEs were observed (regardless of their association with hydrochlorothiazide): anorexia, irritation of the gastric mucosa, diarrhea, constipation,jaundice (associated with intrahepatic cholestasis), pancreatitis, sialadenitis, vertigo, paresthesia, xantopsy, leukopenia, neutropenia / agranulocytosis, thrombocytopenia, aplastic anemia, hemolytic anemia, reactions photosensitization, fever, urticaria, necrotizing angiitis (vasculitis, cutaneous vasculitis), respiratory distress syndrome (including pneumonitis and pulmonary edema), anaphylactic reactions, toxic epidermal necrolysis, hyperglycemia, glucosuria, hyperuricemia, water-electrolyte balance disorders (including hyponatremia and hypokalemia ), renal dysfunction, interstitial nephritis, muscle spasms, weakness, anxiety, transient visual impairment.