Lostad T50

Losartan potassium.

Losartan potassium 50 mg.
Excipients/Inactive Ingredients: Lactose monohydrate, pregelatinized starch, microcrystalline cellulose, colloidal anhydrous silica, magnesium stearate, opadry white, carnauba wax.

Treatment of essential hypertension in adults and in children and adolescents 6 - 18 years of age.
Treatment of renal disease in adult patients with hypertension and type 2 diabetes mellitus with proteinuria ≥ 0.5 g/day as part of an antihypertensive treatment.
Treatment of chronic heart failure in adult patients when treatment with Angiotensin-converting enzyme (ACE) inhibitors is not considered suitable due to incompatibility, especially cough, or contraindication. Patients with heart failure who have been stabilised with an ACE inhibitor should not be switched to losartan. The patients should have a left ventricular ejection fraction ≤ 40% and should be clinically stable and on an established treatment regimen for chronic heart failure.
Reduction in the risk of stroke in adult hypertensive patients with left ventricular hypertrophy documented by ECG.

Dosage: Hypertension: The usual starting and maintenance dose is 50 mg once daily for most patients. The maximal antihypertensive effect is attained 3-6 weeks after initiation of therapy. Some patients may receive an additional benefit by increasing the dose to 100 mg once daily (in the morning).
Losartan may be administered with other antihypertensive agents, especially with diuretics (e.g. hydrochlorothiazide).
Hypertensive type II diabetic patients with proteinuria ≥ 0.5 g/day: The usual starting dose is 50 mg once daily. The dose may be increased to 100 mg once daily based on blood pressure response from one month onwards after initiation of therapy. Losartan may be administered with other antihypertensive agents (e.g. diuretics, calcium channel blockers, alpha- or beta-blockers, and centrally acting agents) as well as with insulin and other commonly used hypoglycemic agents (e.g. sulfonylureas, glitazones and glucosidase inhibitors).
Heart Failure: The usual initial dose of losartan in patients with heart failure is 12.5 mg once daily. The dose should generally be titrated at weekly intervals (i.e. 12.5 mg daily, 25 mg daily, 50 mg daily, 100 mg daily, up to a maximum dose of 150 mg once daily) as tolerated by the patient.
Reduction in the risk of stroke in hypertensive patients with left ventricular hypertrophy documented by ECG: The usual starting dose is 50 mg of losartan once daily. A low dose of hydrochlorothiazide should be added and/or the dose of losartan should be increased to 100 mg once daily based on blood pressure response.
Special populations: Use in patients with intravascular volume depletion: For patients with intravascular volume-depletion (e.g. those treated with high-dose diuretics), a starting dose of 25 mg once daily should be considered.
Use in patients with renal impairment and haemodialysis patients: No initial dosage adjustment is necessary in patients with renal impairment and in haemodialysis patients.
Use in patients with hepatic impairment: A lower dose should be considered for patients with a history of hepatic impairment. There is no therapeutic experience in patients with severe hepatic impairment. Therefore, losartan is contraindicated in patients with severe hepatic impairment.
Paediatric population: 6 months - less than 6 years: The safety and efficacy of children aged 6 months to less than 6 years has not been established.
6 years to 18 years: For patients who can swallow tablets, the recommended dose is 25 mg once daily in patients > 20 to < 50 kg. (In exceptional cases the dose can be increased to a maximum of 50 mg once daily). Dosage should be adjusted according to blood pressure response.
In patients > 50 kg, the usual dose is 50 mg once daily. In exceptional cases the dose can be adjusted to a maximum of 100 mg once daily. Doses above 1.4 mg/kg (or in excess of 100 mg) daily have not been studied in paediatric patients.
Losartan is not recommended for use in children under 6 years old, as limited data are available in these patient groups.
It is not recommended in children with glomerular filtration rate < 30 ml/min/1.73 m², as no data are available.
Losartan is also not recommended in children with hepatic impairment.
Use in Elderly: Although consideration should be given to initiating therapy with 25 mg in patients over 75 years of age, dosage adjustment is not usually necessary for the elderly.
Administration: Lostad T50 should be swallowed whole with a glass of water.
Lostad T50 tablets may be administered with or without food.

Symptoms of intoxication: Limited data are available with regard to overdose in humans. The most likely manifestation of overdose would be hypotension and tachycardia. Bradycardia could occur from parasympathetic (vagal) stimulation.
Treatment of intoxication: If symptomatic hypotension should occur, supportive treatment should be instituted.
Measures are depending on the time of medicinal product intake and kind and severity of symptoms. Stabilisation of the cardiovascular system should be given priority. After oral intake, the administration of a sufficient dose of activated charcoal is indicated. Afterwards, close monitoring of the vital parameters should be performed. Vital parameters should be corrected if necessary.
Neither losartan nor the active metabolite can be removed by haemodialysis.

Hypersensitivity to the active substance or to any of the excipients listed in Description.
2^nd and 3^rd trimester of pregnancy.
Severe hepatic impairment.
The concomitant use of losartan with aliskiren-containing products is contraindicated in patients with diabetes mellitus or renal impairment (GFR < 60 ml/min/1.73 m²).

Hypersensitivity: Angiooedema. Patients with a history of angiooedema (swelling of the face, lips, throat, and/or tongue) should be closely monitored.
Hypotension and Electrolyte/Fluid Imbalance: Symptomatic hypotension, especially after the first dose and after increasing of the dose, may occur in patients who are volume- and/or sodium-depleted by vigorous diuretic therapy, dietary salt restriction, diarrhoea or vomiting. These conditions should be corrected prior to administration of losartan, or a lower starting dose should be used. This also applies to children 6 to 18 years of age.
Electrolyte imbalances: Electrolyte imbalances are common in patients with renal impairment, with or without diabetes, and should be addressed. The plasma concentrations of potassium as well as creatinine clearance values should be closely monitored, especially patients with heart failure and a creatinine clearance between 30 - 50 ml/min should be closely monitored.
The concomitant use of potassium-sparing diuretics, potassium supplements and potassium-containing salt substitutes with losartan is not recommended.
Hepatic impairment: Based on pharmacokinetic data which demonstrate significantly increased plasma concentrations of losartan in cirrhotic patients, a lower dose should be considered for patients with a history of hepatic impairment. There is no therapeutic experience with losartan in patients with severe hepatic impairment. Therefore losartan must not be administered in patients with severe hepatic impairment.
Renal impairment: As a consequence of inhibiting the renin-angiotensin system, changes in renal function including renal failure have been reported (in particular, in patients whose renal function is dependent on the renin-angiotensin-aldosterone system such as those with severe cardiac insufficiency or pre-existing renal dysfunction). As with other medicinal products that affect the renin-angiotensin-aldosterone system, increases in blood urea and serum creatinine have also been reported in patients with bilateral renal artery stenosis or stenosis of the artery to a solitary kidney; these changes in renal function may be reversible upon discontinuation of therapy. Losartan should be used with caution in patients with bilateral renal artery stenosis or stenosis of the artery to a solitary kidney.
Renal function should be regularly monitored during treatment with losartan as it may deteriorate. This applies particularly when losartan is given in the presence of other conditions (fever, dehydration) likely to impair renal function.
Concomitant use of losartan and ACE-inhibitors has shown to impair renal function. Therefore, concomitant use is not recommended.
Renal transplantation: There is no experience in patients with recent kidney transplantation.
Primary hyperaldosteronism: Patients with primary aldosteronism generally will not respond to antihypertensive medicinal products acting through inhibition of the renin-angiotensin system. Therefore, the use of losartan is not recommended.
Coronary heart disease and cerebrovascular disease: As with any antihypertensive agents, excessive blood pressure decrease in patients with ischaemic cardiovascular and cerebrovascular disease could result in a myocardial infarction or stroke.
Heart failure: In patients with heart failure, with or without renal impairment, there is - as with other medicinal products acting on the renin-angiotensin system - a risk of severe arterial hypotension, and (often acute) renal impairment.
There is no sufficient therapeutic experience with losartan in patients with heart failure and concomitant severe renal impairment, in patients with severe heart failure (NYHA class IV) as well as in patients with heart failure and symptomatic life-threatening cardiac arrhythmias. Therefore, losartan should be used with caution in these patient groups. The combination of losartan with a beta-blocker should be used with caution.
Aortic and mitral valve stenosis, obstructive hypertrophic cardiomyopathy: As with other vasodilators, special caution is indicated in patients suffering from aortic or mitral stenosis, or obstructive hypertrophic cardiomyopathy.
Excipients: This medicinal product contains lactose. Patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption should not take this medicine.
Other warnings and precautions: As observed for angiotensin converting enzyme inhibitors, losartan and the other angiotensin antagonists are apparently less effective in lowering blood pressure in black people than in non-blacks, possibly because of higher prevalence of low-renin states in the black hypertensive population.
Dual blockade of the renin-angiotensin-aldosterone system (RAAS): There is evidence that the concomitant use of ACE-inhibitors, angiotensin II receptor blockers or aliskiren increases the risk of hypotension, hyperkalaemia, and decreased renal function (including acute renal failure). Dual blockade of RAAS through the combined use of ACE-inhibitors, angiotensin II receptor blockers or aliskiren is therefore not recommended.
If dual blockade therapy is considered absolutely necessary, this should only occur under specialist supervision and subject to frequent close monitoring of renal function, electrolytes and blood pressure. ACE-inhibitors and angiotensin II receptor blockers should not be used concomitantly in patients with diabetic nephropathy.
Effects on ability to drive and use machines: No studies on the effects on the ability to drive and use machines have been performed. However, when driving vehicles or operating machines it must be borne in mind that dizziness or drowsiness may occasionally occur when taking antihypertensive therapy, in particular during initiation of treatment or when the dose is increased.
Use in Children: Losartan is not recommended in children with hepatic impairment.
Losartan is not recommended in children with glomerular filtration rate < 30 ml/min/1.73 m² as no data are available.

Pregnancy: The use of losartan is not recommended during the first trimester of pregnancy. The use of losartan is contraindicated during the 2^nd and 3^rd trimester of pregnancy.
Epidemiological evidence regarding the risk of teratogenicity following exposure to ACE inhibitors during the first trimester of pregnancy has not been conclusive; however a small increase in risk cannot be excluded. Whilst there is no controlled epidemiological data on the risk with Angiotensin II Receptor Inhibitors (AIIRAs), similar risks may exist for this class of medicinal products. Unless continued AIIRA therapy is considered essential, patients planning pregnancy should be changed to alternative anti-hypertensive treatments which have an established safety profile for use in pregnancy. When pregnancy is diagnosed, treatment with losartan should be stopped immediately and, if appropriate, alternative therapy should be started.
Exposure to AIIRA therapy during the second and third trimesters is known to induce human fetotoxicity (decreased renal function, oligohydramnios, skull ossification retardation) and neonatal toxicity (renal failure, hypotension, hyperkalaemia).
Should exposure to losartan have occurred from the second trimester of pregnancy, ultrasound check of renal function and skull is recommended.
Infants whose mothers have taken losartan should be closely observed for hypotension.
Lactation: Because no information is available regarding the use of losartan during breastfeeding, losartan is not recommended and alternative treatments with better established safety profiles during breastfeeding are preferable, especially while nursing a newborn or preterm infant.

In clinical trials, the most common adverse event was dizziness.
The frequency of adverse reactions listed as follows is defined using the following convention: Very common (≥ 1/10); common (≥ 1/100, to < 1/10); uncommon (≥ 1/1,000, to < 1/100); rare (≥ 1/10,000 to < 1/1,000); very rare (< 1/10,000), not known (cannot be estimated from the available data).
The following adverse reactions are listed based on indication: Hypertension: Nervous system disorders: Common: Dizziness.
Uncommon: Somnolence, headache, sleep disorders.
Ear and labyrinth disorders: Common: Vertigo.
Cardiac disorders: Uncommon: Palpitations, angina pectoris.
Vascular disorders: Uncommon: (Orthostatic) hypotension (including dose-related orthostatic effects) (Especially in patients with intravascular depletion, e.g. patients with severe heart failure or under treatment with high dose diuretics).
Gastrointestinal disorders: Uncommon: Abdominal pain, obstipation.
Skin and subcutaneous tissue disorders: Uncommon: Rash.
General disorders and administration site conditions: Uncommon: Asthenia, fatigue, oedema.
Investigations: Common: Hyperkalaemia.
Rare: Increased alanine aminotransferase (ALT) (Usually resolved upon discontinuation).
Hypertensive patients with left-ventricular hypertrophy: Nervous system disorders: Common: Dizziness.
Ear and labyrinth disorders: Common: Vertigo.
General disorders and administration site conditions: Common: Asthenia, fatigue.
Chronic Heart Failure: Blood and lymphatic system disorders: Common: Anaemia.
Nervous system disorders: Common: Dizziness.
Uncommon: Headache.
Rare: Paraesthesia.
Cardiac disorders: Rare: Syncope, atrial fibrillation, cerebrovascular accident.
Vascular disorders: Common: (Orthostatic) hypotension (including dose-related orthostatic effects) (Especially in patients with intravascular depletion, e.g. patients with severe heart failure or under treatment with high dose diuretics).
Respiratory, thoracic and mediastinal disorders: Uncommon: Dyspnea, cough.
Gastrointestinal disorders: Uncommon: Diarrhoea, nausea, vomiting.
Skin and subcutaneous tissue disorders: Uncommon: Urticaria, pruritus, rash.
Renal and urinary disorders: Common: Renal impairment, renal failure.
General disorders and administration site conditions: Uncommon: Asthenia, fatigue.
Investigations: Common: Increase in blood urea, serum creatinine, and serum potassium.
Uncommon: Hyperkalaemia (Common in patients who received 150 mg losartan instead of 50 mg).
Hypertension and type 2 diabetes with renal disease: Nervous system disorders: Common: Dizziness.
Vascular disorders: Common: (Orthostatic) hypotension (including dose-related orthostatic effects) (Especially in patients with intravascular depletion, e.g. patients with severe heart failure or under treatment with high dose diuretics).
General disorders and administration site conditions: Common: Asthenia, fatigue.
Investigations: Common: Hypoglycaemia, hyperkalaemia.
Post-marketing experience: Blood and lymphatic system disorders: Not known: Anaemia, thrombocytopenia.
Immune system disorders: Rare: Hypersensitivity reactions, anaphylactic reactions, angiooedema (Including swelling of the larynx, glottis, face, lips, pharynx, and/or tongue (causing airway obstruction); in some of these patients angiooedema had been reported in the past in connection with the administration of other medicines, including ACE inhibitors), and vasculitis (Including Henoch-Schönlein purpura).
Psychiatric disorders: Not known: Depression.
Nervous system disorders: Not known: Migraine, dysgeusia.
Ear and labyrinth disorders: Not known: Tinnitus.
Respiratory, thoracic and mediastinal disorders: Not known: Cough.
Gastrointestinal disorders: Not known: Diarrhoea.
Hepatobiliary disorders: Rare: Hepatitis.
Not known: Pancreatitis, liver function abnormalities.
Skin and subcutaneous tissue disorders: Not known: Urticaria, pruritus, rash, photosensitivity.
Musculoskeletal and connective tissue disorders: Not known: Myalgia, arthralgia, rhabdomyolysis.
Reproductive system and breast disorders: Not known: Erectile dysfunction / impotence.
General disorders and administration site conditions: Not known: Malaise.
Investigations: Not known: Hyponatraemia.
The following additional adverse reactions occurred more frequently in patients who received losartan than placebo (frequencies not known): Back pain, urinary tract infection, and flu-like symptoms.
Renal and urinary disorders: As a consequence of inhibiting the renin-angiotensin-aldosterone system, changes in renal function including renal failure have been reported in patients at risk; these changes in renal function may be reversible upon discontinuation of therapy.
Paediatric population: The adverse reaction profile for paediatric patients appears to be similar to that seen in adult patients. Data in the paediatric population are limited.

Other antihypertensive agents may increase the hypotensive action of losartan. Concomitant use with other substances which may induce hypotension as an adverse reaction (like tricyclic antidepressants, antipsychotics, baclofen and amifostine) may increase the risk of hypotension.
Losartan is predominantly metabolised by cytochrome P450 (CYP) 2C9 to the active carboxy-acid metabolite. Fluconazole (inhibitor of CYP2C9) decreases the exposure to the active metabolite. Concomitant treatment of losartan with rifampicin (inducer of metabolism enzymes) gave a reduction in plasma concentration of the active metabolite. The clinical relevance of this effect is unknown.
As with other medicinal products that block angiotensin II or its effects, concomitant use of other medicinal products which retain potassium (e.g. potassium-sparing diuretics: amiloride, triamterene, spironolactone) or may increase potassium levels (e.g. heparin), potassium supplements or salt substitutes containing potassium may lead to increases in serum potassium. Co-medication is not advisable.
Reversible increases in serum lithium concentrations and toxicity have been reported during concomitant administration of lithium with ACE inhibitors. Very rare cases have also been reported with angiotensin II receptor antagonists. Co-administration of lithium and losartan should be undertaken with caution. If this combination proves essential, serum lithium level monitoring is recommended during concomitant use.
When angiotensin II antagonists are administered simultaneously with NSAIDs (i.e. selective COX-2 inhibitors, acetylsalicylic acid at anti-inflammatory doses and non-selective NSAIDs), attenuation of the antihypertensive effect may occur. Concomitant use of angiotensin II antagonists or diuretics and NSAIDs may lead to an increased risk of worsening of renal function, including possible acute renal failure, and an increase in serum potassium, especially in patients with poor pre-existing renal function. The combination should be administered with caution, especially in the elderly. Patients should be adequately hydrated and consideration should be given to monitoring renal function after initiation of concomitant therapy, and periodically thereafter.
Clinical trial data have shown that dual blockade of the RAAS through the combined use of ACE-inhibitors, angiotensin II receptor blockers or aliskiren is associated with a higher frequency of adverse events such as hypotension, hyperkalaemia, and decreased renal function (including acute renal failure) compared to the use of a single RAAS-acting agent.

Store in a well-closed container, in a dry place. Protect from light. Do not store above 30°C.

Angiotensin II Antagonists

C09CA01 - losartan ; Belongs to the class of angiotensin II receptor blockers (ARBs). Used in the treatment of cardiovascular disease.

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