Active Substance: aliskiren / hydrochlorothiazide
Common Name: aliskiren / hydrochlorothiazide
ATC Code: C09XA52
Marketing Authorisation Holder: Novartis Europharm Limited
Active Substance: aliskiren / hydrochlorothiazide
Authorisation Date: 2009-01-16
Therapeutic Area: Hypertension
Pharmacotherapeutic Group: Agents acting on the renin-angiotensin system
Treatment of essential hypertension in adults.
Rasilez HCT is indicated in patients whose blood pressure is not adequately controlled on aliskiren or hydrochlorothiazide used alone.
Rasilez HCT is indicated as substitution therapy in patients adequately controlled with aliskiren and hydrochlorothiazide, given concurrently, at the same dose level as in the combination.
What is Rasilez HCT?
Rasilez HCT is a medicine that contains the active substances aliskiren and hydrochlorothiazide. It is available as tablets (150 mg aliskiren and 12.5 mg hydrochlorothiazide; 150 mg aliskiren and 25 mg hydrochlorothiazide; 300 mg aliskiren and 12.5 mg hydrochlorothiazide; 300 mg aliskiren and 25 mg hydrochlorothiazide).
What is Rasilez HCT used for?
Rasilez HCT is used to treat essential hypertension (high blood pressure) in adults. ‘Essential’ means that no specific cause for the hypertension can be found.
Rasilez HCT is used in patients whose blood pressure is not adequately controlled by aliskiren or hydrochlorothiazide taken alone. It can also be used in patients whose blood pressure is adequately controlled with aliskiren and hydrochlorothiazide taken as separate tablets, to replace the same doses of the two active substances.
The medicine can only be obtained with a prescription.
How is Rasilez HCT used?
The recommended dose of Rasilez HCT is one tablet per day. Rasilez HCT should not be taken together with fruit juice or drinks containing plant extracts such as herbal teas. The dose depends on the doses of aliskiren and/or hydrochlorothiazide that the patient was taking before.
Patients previously taking only aliskiren or hydrochlorothiazide may need to take the two substances as separate tablets and adjust the doses before switching to Rasilez HCT. After two to four weeks of taking Rasilez HCT, the dose can be increased in patients whose blood pressure remains uncontrolled.
In patients already adequately controlled with the two active substances, the dose of Rasilez HCT must contain the same doses of aliskiren and hydrochlorothiazide that the patient was taking before.
How does Rasilez HCT work?
Rasilez HCT contains two active substances, aliskiren and hydrochlorothiazide.
Aliskiren is a renin inhibitor. It blocks the activity of a human enzyme called renin, which is involved in the production of a substance called angiotensin I in the body. Angiotensin I is converted into the hormone angiotensin II, which is a powerful vasoconstrictor (a substance that narrows blood vessels). By blocking the production of angiotensin I, levels of both angiotensin I and angiotensin II fall. This causes vasodilation (widening of the blood vessels), so that the blood pressure drops.
Hydrochlorothiazide is a diuretic, which is another type of treatment for hypertension. It works by increasing urine output, reducing the amount of fluid in the blood and reducing blood pressure.
The combination of the two active substances has an additive effect, reducing the blood pressure more than either medicine alone. By lowering blood pressure, the risk caused by high blood pressure, such as having a stroke, is reduced.
How has Rasilez HCT been studied?
Aliskiren on its own has been authorised in the European Union (EU) since August 2007 as Rasilez, Sprimeo and Riprazo. The company presented information used in the assessment of aliskiren and from the published literature to support its application for Rasilez HCT, as well as information from additional studies.
Overall, the company presented the results of nine main studies involving a total of almost 9,000 patients with essential hypertension. Most studies involved patients with mild to moderate hypertension and one involved patients with severe hypertension. The studies compared the combination of aliskiren and hydrochlorothiazide with placebo (a dummy treatment), with aliskiren or hydrochlorothiazide taken alone, or with other medicines for hypertension (valsartan, irbesartan, lisinopril or amlodipine). The studies lasted for between eight weeks and a year, and the main measure of effectiveness was the change in blood pressure either during the resting phase of the heartbeat (diastolic) or when the chambers of the heart were contracting (systolic).
Three additional studies were carried out to show that the active substances were absorbed in the body in the same way when they taken as separate tablets and as Rasilez HCT.
What benefit has Rasilez HCT shown during the studies?
Rasilez HCT was more effective than placebo in reducing blood pressure. In patients whose blood pressure was not adequately controlled on either aliskiren or hydrochlorothiazide alone, switching to the combination resulted in greater falls in blood pressure than remaining on one active substance alone.
What is the risk associated with Rasilez HCT?
Side effects with Rasilez HCT are generally mild and transient. The most common side effect with Rasilez HCT (seen in between 1 and 10 patients in 100) is diarrhoea. Other common side effects (seen in more than 1 in 10 patients) that have been observed with hydrochlorothiazide alone are hypokalaemia (low blood potassium levels) and increases in blood cholesterol and triglyceride (a type of fat) levels. For the full list of all side effects reported with Rasilez HCT, see the package leaflet.
Rasilez HCT must not be used in patients who have had angioedema (swelling under the skin) with aliskiren, hereditary angioedema or angioedema of no obvious cause, who have anuria (a condition in which a patient cannot make or pass urine), severe kidney or liver impairment, or whose blood potassium levels are too low or blood calcium levels are too high. It must not be taken with ciclosporin, itraconazole or other medicines known as ‘potent P-glycoprotein inhibitors’ (such as quinidine). It must not be used in women who are more than three months pregnant. Its use during the first three months of pregnancy is not recommended. Rasilez HCT in combination with an ‘angiotensin converting enzyme (ACE) inhibitors’ or ‘angiotensin receptor blockers’ (ARBs) must not be used in patients with diabetes, or moderate or severe kidney impairment. Rasilez HCT is for use in adults only; it must not be used in children aged less than 2 years and is not recommended for older children. For the full list of restrictions, see the package leaflet.
Why has Rasilez HCT been approved?
The CHMP decided that Rasilez HCT’s benefits are greater than its risks and recommended that it be given marketing authorisation.
What measures are being taken to ensure the safe and effective use of Rasilez HCT?
Recommendations and precautions to be followed by healthcare professionals and patients for the safe and effective use of Rasilez HCT have also been included in the summary of product characteristics and the package leaflet.
Other information about Rasilez HCT
The European Commission granted a marketing authorisation valid throughout the EU for Rasilez HCT on 16 January 2009.
Source: European Medicines Agency
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