Azilsartan Medoxomil + Chlorthalidone

It is an angiotensin II receptor blocker (ARB) and a thiazidelike diuretic combination product indicated for the treatment of hypertension, to lower blood pressure: ? In patients not adequately controlled with monotherapy ? As initial therapy in patients likely to need multiple drugs to help achieve blood pressure goals Lowering blood pressure reduces the risk of fatal and nonfatal cardiovascular events, primarily strokes and myocardial infarctions

Angiotensin II receptor blocker (ARB) and a thiazidelike diuretic

Azilsartan medoxomil is an angiotensin II receptor blocker (ARB). Azilsartan helps blood vessels to dilate. It also helps to excrete of Sodium and water from body. This combination also contains a diuretic. Chlorthalidone works in the kidneys to flush excess water and salt (sodium) from the body. Together, these 2 medicines work to help lower blood pressure in people who need more than 1 medicine to treat their high blood pressure (hypertension). Absorption: Azilsartan medoxomil is rapidly hydrolyzed to azilsartan, the active metabolite, in the gastrointestinal tract during absorption. Azilsartan medoxomil is not detected in plasma after oral administration. The estimated absolute bioavailability of azilsartan following administration of azilsartan medoxomil is approximately 60%. After oral administration of azilsartan medoxomil, peak plasma concentrations (Cmax) of azilsartan are reached within 1.5 to 3 hours. Food does not affect the bioavailability of azilsartan. Distribution: The volume of distribution of azilsartan is approximately 16L. Azilsartan is highly bound to human plasma proteins (>99%), mainly serum albumin. Protein binding is constant at azilsartan plasma concentrations well above the range achieved with recommended doses. In whole blood, chlorthalidone is predominantly bound to erythrocyte carbonic anhydrase. In the plasma, approximately 75% of chlorthalidone is bound to plasma proteins, 58% of the drug being bound to albumin. Metabolism and Elimination: Azilsartan medoxomil: Azilsartan is metabolized to two primary metabolites. The major metabolite in plasma is formed by O-dealkylation, referred to as metabolite M II, and the minor metabolite is formed by decarboxylation, referred to as metabolite M-I. Systemic exposures to the major and minor metabolites in humans were approximately 50% and less than 1% of azilsartan, respectively. M-I and MII do not contribute to the pharmacologic activity of azilsartan medoxomil. The major enzyme responsible for azilsartan metabolism is CYP2C9. The elimination half-life of azilsartan is approximately 11 hours and renal clearance is approximately 2.3 mL/min. Steady-state levels of azilsartan are achieved within 5 days and no accumulation in plasma occurs with repeated once-daily dosing. Chlorthalidone: The major portion of the drug is excreted unchanged by the kidneys. Nonrenal routes of elimination have yet to be clarified. Data are not available regarding the percentage of dose as unchanged drug and metabolites, the concentration of the drug in body fuids, degree of uptake by a particular organ or in the fetus, or passage across the blood-brain barrier.

Starting dose is 40/12.5 mg once daily ? Edarbyclor may be used to provide additional blood pressure lowering for patients not adequately controlled on azilsartan medoxomil 80 mg or chlorthalidone 25 mg ? Dose may be increased to 40/25 mg after 2 to 4 weeks as needed to achieve blood pressure goals ? Maximal dose is 40/25 mg . May be administered with other antihypertensive agents . Edarbyclor may be administered with or without food ? Replace volume in volume-depleted patients prior to use

Renal clearance of lithium is reduced by diuretics, such as chlorthalidone increasing the risk of lithium toxicity. NSAIDs increase risk of renal dysfunction and interfere with antihypertensive effect

Anuria

Dizziness and fatigue

Pregnancy Pregnancy Category D Use of drugs that affect the renin-angiotensin system during the second and third trimesters of pregnancy reduces fetal renal function and increases fetal and neonatal morbidity and death. Resulting oligohydramnios can be associated with fetal lung hypoplasia and skeletal deformations. Potential neonatal adverse effects include skull hypoplasia, anuria, hypotension, renal failure, and death. When pregnancy is detected, discontinue Edarbyclor as soon as possible. These adverse outcomes are usually associated with use of these drugs in the second and third trimester of pregnancy. Most epidemiologic studies examining fetal abnormalities after exposure to antihypertensive use in the first trimester have not distinguished drugs affecting the renin-angiotensin system from other antihypertensive agents. Appropriate management of maternal hypertension during pregnancy is important to optimize outcomes for both mother and fetus. In the unusual case that there is no appropriate alternative to therapy with drugs affecting the reninangiotensin system for a particular patient, apprise the mother of the potential risk to the fetus. Perform serial ultrasound examinations to assess the intra-amniotic environment. If oligohydramnios is observed, discontinue Edarbyclor, unless it is considered lifesaving for the mother. Fetal testing may be appropriate, based on the week of pregnancy. Patients and physicians should be aware, however, that oligohydramnios may not appear until after the fetus has sustained irreversible injury. Closely observe infants with histories of in utero exposure to Edarbyclor for hypotension, oliguria, and hyperkalemia Nursing Mothers It is not known if azilsartan is excreted in human milk, but azilsartan is excreted at low concentrations in the milk of lactating rats and thiazide-like diuretics like chlorthalidone are excreted in human milk. Because of the potential for adverse effects on the nursing infant, a decision should be made whether to discontinue nursing or discontinue the drug, taking into account the importance of the drug to the mother

Store at 25°C

P⊗ L⊗