Compare Losartan vs. Diovan

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Cozaar
(losartan)

Diovan
(valsartan)

Lowers blood pressure. Cozaar (Losartan) is a good blood pressure-lowering medicine that protects kidney function like an ACE inhibitor, but with fewer side effects.Lowers blood pressure. Diovan (Valsartan) is a good blood pressure-lowering medicine that protects kidney function like an ACE inhibitor, but with fewer side effects.
Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected
4.99Losartan
Reviews for Losartan
57%
of people (All ages) say Losartan is worth it
48%
say it works well
16%
say it's a big hassle
535 reviews
Have you used Cozaar (losartan)?
Worth itNot sureNot worth it
Reviews for Diovan
65%
-8% worse vs. Losartan
54%
-6% worse vs. Losartan
15%
-1% worse vs. Losartan
431 reviews
Have you used Diovan (valsartan)?
Worth itNot sureNot worth it
Side effects
LosartanDiovan
  • Upper respiratory infection 1%
  • Dizziness 1%
  • Back pain 1%
  • Nasal congestion 1%
  • Urinary tract infection 6%
  • Diarrhea 5%
  • Asthenia/Fatigue 4%
  • Anemia 3%
  • Hypoglycemia 4%
  • Back pain 2%
More Losartan side effects »
  • Cough 1%
  • Viral infection 1%
  • Fatigue 1%
  • Abdominal pain 1%
  • Dizziness 8%
  • Hypotension 5%
  • Diarrhoea 1%
  • Arthralgia 1%
  • Back pain 1%
  • Dizziness, postural 1%
More Diovan side effects »
How it works
LosartanDiovan
Cozaar (Losartan) is an angiotensin receptor blocker (ARB). It blocks a chemical that tightens blood vessels. This makes blood vessels relax, which lowers blood pressure and allows more blood and oxygen to get to your heart and other organs.Diovan (Valsartan) is an angiotensin receptor blocker (ARB). It blocks a chemical that tightens blood vessels. This makes blood vessels relax, which lowers blood pressure and allows more blood and oxygen to get to your heart and other organs.
Type of medication
LosartanDiovan
Prescription onlyPrescription only
Available as
LosartanDiovan
  • Pill
  • Pill
Used for
LosartanDiovan
Risk factors for serious side effects
LosartanDiovan
  • Women of childbearing age
  • Concurrent liver disease
  • Current kidney problems
  • Medicine that increase potassium
  • Use of salt substitute
Detailed Cozaar (losartan) risks & warnings »
  • Women of childbearing age
  • African descent
  • Current kidney problems
  • Medicine that increase potassium
  • Use of salt substitute
Detailed Diovan (valsartan) risks & warnings »
Pregnancy

Research studies with real people found harmful effects on unborn babies, but the benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

Research studies with real people found harmful effects on unborn babies, but the benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

Kidneys and liver
LosartanDiovan
  • Requires routine blood tests to check kidney function.
  • Protects kidney function, which is especially useful for people with diabetes or mild-to-moderate kidney disease.
  • Requires routine blood tests to check kidney function.
  • Protects kidney function, which is especially useful for people with diabetes or mild-to-moderate kidney disease.
Upsides and benefits
LosartanDiovan
  • A first-choice blood pressure treatment for many people.
  • Lowers the risk of heart attack and stroke.
  • Similar to ACE inhibitors (like Lisinopril), with fewer side effects like cough and swelling.
  • Protects kidney function, which is especially useful for people with diabetes or mild-to-moderate kidney disease.
  • Recommended for anyone with heart failure since it lowers the risk of death and further damage to your heart.
  • A first-choice blood pressure treatment for many people.
  • Lowers the risk of heart attack and stroke.
  • Similar to ACE inhibitors (like Lisinopril), with fewer side effects like cough and swelling.
  • Protects kidney function, which is especially useful for people with diabetes or mild-to-moderate kidney disease.
  • Recommended for anyone with heart failure since it lowers the risk of death and further damage to your heart.
Downsides and risks
LosartanDiovan
  • Requires a yearly blood test to see how the medicine is affecting your body.
  • Not safe to use if you're pregnant.
  • Requires a yearly blood test to see how the medicine is affecting your body.
  • Not safe to use if you're pregnant.
Tips from our pharmacists for people taking the medication
LosartanDiovan
  • Can cause dizziness in the first few days.
  • Check your blood pressure 1 week after starting this medicine, and tell your doctor if it hasn't improved.
  • Tell your doctor about any dizziness, fatigue, cough, or throat irritation that doesn't go away.
  • Requires routine blood tests to check kidney function.
  • Don't take it if you're pregnant.
  • Can cause dizziness in the first few days.
  • Check your blood pressure 1 week after starting this medicine, and tell your doctor if it hasn't improved.
  • Tell your doctor about any dizziness, fatigue, cough, or throat irritation that doesn't go away.
  • Requires routine blood tests to check kidney function.
  • Don't take it if you're pregnant.
Learn more
More about LosartanSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Cozaar (losartan)?
Worth itNot sureNot worth it
More about DiovanSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Diovan (valsartan)?
Worth itNot sureNot worth it