Losar; Cozaar (brand availability varies by market)
Dosage form
Tablet
Strength
25 mg, 50 mg, 100 mg tablets; prescribed strength depends on condition and patient.
Prescription classification
Prescription only (Schedule H / verified)
Approved routes of administration
Oral
Applies to
IN; product status and availability may vary by jurisdiction
Approved indications
Losartan is an angiotensin II receptor blocker (ARB) used to manage high blood pressure. It may also be prescribed for selected patients with heart failure or diabetic kidney disease.
Contraindications (do not use if…)
Losartan is contraindicated in pregnancy. Do not take it if you have had a serious allergic reaction to losartan or any product ingredient. Certain combinations — such as aliskiren in people with diabetes — should be avoided unless a specialist directs otherwise.
Important precautions
Your blood pressure, kidney function, and potassium levels may need monitoring. Dehydration, kidney disease, and use of potassium supplements or anti-inflammatory medicines can increase your risk of side effects.
Common side effects
Common side effects include dizziness, low blood pressure, fatigue, and raised potassium levels.
Serious side effects — seek urgent medical care
Seek urgent help for facial or throat swelling, fainting, very low urine output, or symptoms of dangerously high potassium — such as severe weakness or an abnormal heartbeat.
Important interactions
Important interactions include potassium supplements, salt substitutes, ACE inhibitors, aliskiren, lithium, NSAIDs, and some diuretics. Review your full medicine list with your doctor.
Allergy considerations
Avoid losartan if you have had a serious reaction to it or any ingredient in the formulation.
Pregnancy and lactation
Pregnancy safety
Contraindicated
Notes
Do not take losartan during pregnancy. If you become pregnant while on losartan, contact your prescriber straight away — an alternative treatment is needed.
Information
Lactation safety
Use with caution — see notes
Notes
Breastfeeding suitability depends on the infant's age and clinical circumstances. An alternative may be preferred, especially for newborns or premature infants.
Children and older adults
Dose and monitoring depend on age, kidney function, and the condition being treated. Older adults and people who are dehydrated may be more prone to dizziness or low blood pressure.
Storage
Store in original packaging in a dry place at the temperature stated on the label. Keep away from children.
Missed dose
Take the next dose at your usual time. Do not double up to make up for a missed dose.
Overdose
Too much losartan can cause severe dizziness, fainting, or low blood pressure. Seek urgent medical advice.
If you suspect an overdose or accidental poisoning:
contact your local emergency services or the nearest hospital emergency department immediately. Do not wait for symptoms.
Losar; Cozaar (brand availability varies by market)
Dosage form
Tablet
Strength
25 mg, 50 mg, 100 mg tablets; prescribed strength depends on condition and patient.
Prescription classification
Prescription only (Schedule H / verified)
Approved routes of administration
Oral
Applies to
IN; product status and availability may vary by jurisdiction
Approved indications
Losartan is an angiotensin II receptor blocker (ARB) used to manage high blood pressure. It may also be prescribed for selected patients with heart failure or diabetic kidney disease.
Contraindications (do not use if…)
Losartan is contraindicated in pregnancy. Do not take it if you have had a serious allergic reaction to losartan or any product ingredient. Certain combinations — such as aliskiren in people with diabetes — should be avoided unless a specialist directs otherwise.
Important precautions
Your blood pressure, kidney function, and potassium levels may need monitoring. Dehydration, kidney disease, and use of potassium supplements or anti-inflammatory medicines can increase your risk of side effects.
Common side effects
Common side effects include dizziness, low blood pressure, fatigue, and raised potassium levels.
Serious side effects — seek urgent medical care
Seek urgent help for facial or throat swelling, fainting, very low urine output, or symptoms of dangerously high potassium — such as severe weakness or an abnormal heartbeat.
Important interactions
Important interactions include potassium supplements, salt substitutes, ACE inhibitors, aliskiren, lithium, NSAIDs, and some diuretics. Review your full medicine list with your doctor.
Allergy considerations
Avoid losartan if you have had a serious reaction to it or any ingredient in the formulation.
Pregnancy and lactation
Pregnancy safety
Contraindicated
Notes
Do not take losartan during pregnancy. If you become pregnant while on losartan, contact your prescriber straight away — an alternative treatment is needed.
Information
Lactation safety
Use with caution — see notes
Notes
Breastfeeding suitability depends on the infant's age and clinical circumstances. An alternative may be preferred, especially for newborns or premature infants.
Children and older adults
Dose and monitoring depend on age, kidney function, and the condition being treated. Older adults and people who are dehydrated may be more prone to dizziness or low blood pressure.
Storage
Store in original packaging in a dry place at the temperature stated on the label. Keep away from children.
Missed dose
Take the next dose at your usual time. Do not double up to make up for a missed dose.
Overdose
Too much losartan can cause severe dizziness, fainting, or low blood pressure. Seek urgent medical advice.
If you suspect an overdose or accidental poisoning:
contact your local emergency services or the nearest hospital emergency department immediately. Do not wait for symptoms.
