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Review: Losartan side effects

In this review, we analyze Losartan side effects by the time on the drug, gender and age (0-60+) of the people who have side effects while taking Losartan. The review is based on 12,974 people who have side effects while taking Losartan from FDA and social media, and is updated regularly.

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What is Losartan

Losartan (latest outcomes from 14,067 users) has active ingredients of losartan potassium. It is often used in high blood pressure.

Other drugs that have the same active ingredients (losartan potassium): Cozaar, Losartan Potassium.

On Jan, 12, 2015: 12,974 people who reported to have side effects when taking Losartan are studied


Most common side effects over time * :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ yearsnot specified
Headache (pain in head)DizzinessDizzinessDizzinessHypertension (high blood pressure)Headache (pain in head)Blood Pressure IncreasedDyspnoea (difficult or laboured respiration)
DizzinessFatigue (feeling of tiredness)Angioedema (rapid swelling of the dermis)Ischaemic Stroke (stroke; caused by an interruption in the flow of blood to the brain)Arthralgia (joint pain)Hypertension (high blood pressure)Rash (redness)Fatigue (feeling of tiredness)
Blood Pressure IncreasedRenal Failure Acute (rapid kidney dysfunction)Erectile DysfunctionBlood Pressure IncreasedHeart Rate IncreasedMuscle Spasms (muscle contraction)Urinary Tract InfectionDizziness
InfectionDiarrhoeaLiver Disorder (liver diseases)Hyperkalaemia (damage to or disease of the kidney)DiarrhoeaRenal Failure (kidney dysfunction)Oedema Peripheral (superficial swelling)Nausea (feeling of having an urge to vomit)
Drug IneffectiveLiver Disorder (liver diseases)Nausea (feeling of having an urge to vomit)Angioedema (rapid swelling of the dermis)Panic AttackCoughFace Oedema (swelling of face)Pain
Erythema Multiforme (type of hypersensitivity reaction)Headache (pain in head)Fatigue (feeling of tiredness)Headache (pain in head)Irritable Bowel SyndromeConstipationPruritus (severe itching of the skin)Diarrhoea
Nephrotic Syndrome (kidney disease with proteinuria, hypoalbuminemia, and oedema)VomitingMalaise (a feeling of general discomfort or uneasiness)Cold SweatNausea (feeling of having an urge to vomit)DizzinessLymphadenopathy (disease or enlargement of lymph nodes)Headache (pain in head)
Nausea (feeling of having an urge to vomit)Abdominal PainHeadache (pain in head)Bronchopneumonia (inflammation of the lungs, arising in the bronchi or bronchioles)PneumoniaDepressionPriapism (prolonged and painful erection that can last from several hours up to a few days)Arthralgia (joint pain)
Dyspnoea (difficult or laboured respiration)Angioedema (rapid swelling of the dermis)Dyspnoea (difficult or laboured respiration)Renal Failure Chronic (long lasting kidney dysfunction)Gastrointestinal Haemorrhage (bleeding gastrointestinal tract)Cardiac FailureSwollen Tongue (swelling of tongue)Asthenia (weakness)
Oedema Peripheral (superficial swelling)Blood Pressure IncreasedPulmonary Oedema (fluid accumulation in the lungs)Cerebral Ischaemia (insufficient blood flow to the brain to meet metabolic demand)Anaemia (lack of blood)Nausea (feeling of having an urge to vomit)Tongue Oedema (swelling of tongue)Drug Ineffective

Most common side effects by gender * :

DizzinessDyspnoea (difficult or laboured respiration)
Nausea (feeling of having an urge to vomit)Fatigue (feeling of tiredness)
Dyspnoea (difficult or laboured respiration)Pyrexia (fever)
Headache (pain in head)Nausea (feeling of having an urge to vomit)
Fatigue (feeling of tiredness)Dizziness
VomitingMalaise (a feeling of general discomfort or uneasiness)
Arthralgia (joint pain)Asthenia (weakness)
Hypertension (high blood pressure)Hypotension (abnormally low blood pressure)

Most common side effects by age * :

Exposure To Communicable DiseaseDevice Related InfectionLupus Nephritis (a chronic inflammatory autoimmune disorder that may affect kidney tissue)Convulsion (muscles contract and relax rapidly and repeatedly, resulting in an uncontrolled shaking of the body)Malaise (a feeling of general discomfort or uneasiness)Dyspnoea (difficult or laboured respiration)Dyspnoea (difficult or laboured respiration)Nausea (feeling of having an urge to vomit)
Blood Pressure IncreasedRenal Failure Acute (rapid kidney dysfunction)InfectionArthralgia (joint pain)Pyrexia (fever)Headache (pain in head)Arthralgia (joint pain)Dizziness
VomitingHenoch-schonlein Purpura (inflammation of the blood vessels in the skin and other body organs)Systemic Lupus Erythematosus (an autoimmune disease, which means the body's immune system mistakenly, attacks healthy tissue)Arrhythmia (irregular heartbeat)Fatigue (feeling of tiredness)Fatigue (feeling of tiredness)Nausea (feeling of having an urge to vomit)Dyspnoea (difficult or laboured respiration)
Loss Of ConsciousnessHypertension (high blood pressure)Pyrexia (fever)Oedema Peripheral (superficial swelling)Renal Failure (kidney dysfunction)Nausea (feeling of having an urge to vomit)DizzinessFatigue (feeling of tiredness)
Cardiac ArrestFatigue (feeling of tiredness)Hypertension (high blood pressure)Urinary Tract InfectionHypotension (abnormally low blood pressure)Hypertension (high blood pressure)PainDiarrhoea
Foetal Growth Restriction (poor growth of a baby while in the mother's womb during pregnancy)Hypotension (abnormally low blood pressure)Dyspnoea (difficult or laboured respiration)DiarrhoeaDiarrhoeaPyrexia (fever)Headache (pain in head)Asthenia (weakness)
Oligohydramnios (a condition in pregnancy characterized by a deficiency of amniotic fluid)Oedema Nos (fluid collection in tissue)Blood Creatinine IncreasedCondition AggravatedNausea (feeling of having an urge to vomit)CoughDrug IneffectiveHeadache (pain in head)
Congenital Renal Disorder (disease of kidney by birth)Anaemia Nos (lack of blood)Renal Failure (kidney dysfunction)Blood Creatinine IncreasedPainDizzinessFatigue (feeling of tiredness)Pyrexia (fever)
Pulmonary Embolism (blockage of the main artery of the lung)Proteinuria PresentRenal Impairment (severely reduced kidney function)Blood Pressure IncreasedUrinary Tract InfectionRash (redness)Hypotension (abnormally low blood pressure)Malaise (a feeling of general discomfort or uneasiness)
Proteinuria (presence of protein in the urine)Septic Arthritis Staphylococcal (bacterial blood infection spreads to joint caused by staphylococcus)Hypotension (abnormally low blood pressure)Hypertension (high blood pressure)Convulsion (muscles contract and relax rapidly and repeatedly, resulting in an uncontrolled shaking of the body)Blood Pressure IncreasedPyrexia (fever)Vomiting

* Some reports may have incomplete information.

Browse Losartan side effects from A to Z:

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Are you taking Losartan?

Comments from related studies:

  • From this study (20 hours ago):

  • After taking Losartan for two weeks severe joint and muscle pain began. After ceasing taking it six months down the line no change in pain level and blood tests have found no reason for the pain


  • From this study (21 hours ago):

  • meds are slowly being reduced . however ICD implanted


  • From this study (5 days ago):

  • Eye twitches but not all the time


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  • Losartan potassium headaches (1 response)
    I avoided going to the doctor for years and decided it was time to bite the bullet. The bullet bit back. High Blood pressure and cholesterol. Doc prescribed me 100mg Losartan Potassium right out of the gate. At 33 years old, this concerns me. I've been on it for about a week and have had a constant moderate headache along with some slight dizziness/foggy feeling. I also noticed some ringing in my ears a few times as well. Going back to the doc today. My pharmacist says they usually start people on lower doses than 100 mg. Anyone else dealing with something similar?
  • High blood pressure - find the right medication (2 responses)
    I was going through the menopause with all the usual drama when I started feeling awful. Doc said that my blood pressure was through the roof and prescribed Lisinopril. This gave me technicolour dreams and a runny nose, so he switched me to Losartan. This made me soooo tired that I didn't want to get up. So then I tried Amlopidine. Fantastic! I haven't felt this well since I was on my teens. My message is ... don't put up with side effects. Change your drug until you find the one that works for you.
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    This drug is causing me dreams nightly. I have taken it for 3 weeks. Will be letting my physician know.

More reviews for: Losartan

On eHealthMe, Losartan (losartan potassium) is often used for high blood pressure. Find out below the conditions Losartan is used for, how effective it is, and any alternative drugs that you can use to treat those same conditions.

What is Losartan used for and how effective is it:

Other drugs that are used to treat the same conditions:

Studies of common Losartan drug interactions:

Browse Losartan drug interactions with drugs from A to Z:

NOTE: The study is based on active ingredients and brand name. Other drugs that have the same active ingredients (e.g. generic drugs) are NOT considered.

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only, and has not been supported by scientific studies or clinical trials unless otherwise stated. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

You may report adverse side effects to the FDA at or 1-800-FDA-1088 (1-800-332-1088).

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