Key takeaways
Losartan and alcohol don’t directly interact, but mixing the two can cause amplified effects like dizziness and lightheadedness.
Occasional moderate drinking may be fine once the body has adjusted to losartan.
Heavy drinking can worsen blood pressure control over time and increase the risks of falls, kidney problems, and other side effects.
Losartan (brand name: Cozaar) is one of the most commonly prescribed blood pressure medications in the U.S. It belongs to a class of drugs called angiotensin II receptor blockers (ARBs), and it works by relaxing blood vessels to lower blood pressure. Since it’s taken daily, many people think about how it plays into their lifestyle, including having a glass of wine at dinner or beer with friends. While there’s no direct interaction, mixing the two can still come with health risks.
Save up to 80% on Losartan with SingleCare
Different pharmacies offer different prices for the same medication. SingleCare helps find the best price for you.
Can you drink while taking losartan?
If you’re a healthy adult with well-controlled blood pressure, an occasional drink is usually fine. The Food and Drug Administration (FDA) label for losartan doesn’t mention a direct interaction with alcohol, and alcohol doesn’t interfere with how losartan is processed in the body.
The main concern involves drinking when first starting losartan. Most people start on the same dosage of 50 mg once daily, and it’s common to experience mild adverse effects during the first week or two. Drinking alcohol during this time can amplify these side effects, especially dizziness and lightheadedness.
People who have been taking losartan regularly for a few months may already be used to the medication at a steady dose. In these cases, a healthcare provider may give the green light to drink alcohol in moderation. That means no more than one drink per day for women and no more than two drinks per day for men.
Still, apart from the risk of increased common side effects of losartan, mixing alcohol with losartan may also come with more serious risks. People who have mild to moderate liver damage (cirrhosis) from drinking need to start on a lower dose of losartan because the drug can accumulate in the body.
What happens if you mix losartan and alcohol?
Mixing losartan and alcohol can mean much lower blood pressure than using either one alone. For most people, that means some extra dizziness. For others, it can be more severe.
Lower blood pressure
Alcohol relaxes the blood vessels and makes you pee more, which can lower blood pressure. Losartan has similar effects, which can lead to lower blood pressure than normal, also known as hypotension. A Cochrane review found that heavy drinking can lower blood pressure for several hours before it rebounds back up.
Dizziness and sluggishness
Dizziness is already one of the more common side effects of losartan. Alcohol can cause similar effects, since it slows the nervous system and decreases coordination. Mixing the two could make you feel more dizzy or sluggish. The effect may be more noticeable in the first week or two of treatment, or right after your dose goes up.
Less effective long-term blood pressure control
Although alcohol can have blood pressure-lowering effects in the moment, it may cause high blood pressure over time. One meta-analysis found that drinking the equivalent of one drink per day increased systolic pressure by around 1 mmHg, and four drinks per day pushed it up nearly 5 mmHg. Therefore, drinking alcohol can actually counteract the effects of losartan.
Higher risk of falls and fainting
Dizziness and unsteadiness from alcohol and losartan can increase the risk of falls and fainting, especially in older adults. Drinking in moderation isn’t likely to cause fainting. The major concern is with binge drinking or getting dehydrated, which could amplify fainting risks.
High potassium and kidney strain
Losartan can lead to increased potassium levels, which can place extra stress on the kidneys. Heavy drinking can be dehydrating and throw off electrolytes, including potassium, which can worsen potential kidney problems. Although this isn’t usually a serious concern for social drinkers with healthy kidneys, it may turn into something more serious for those who drink heavily or already have kidney disease.
How long should you wait to drink after taking losartan?
Although the drug has a half-life of a couple of hours, it gets converted into an active form (called EXP3174) that can stick around for six to nine hours. Since it can take around five half-lives for a drug to be nearly cleared from the body, losartan could stay in the body for almost two days. Still, the effects of losartan typically only last for a day.
You don’t need to focus too much on the timing. Spacing a glass of wine four to six hours from the last dose isn’t likely to cause serious side effects. What matters more is how much you drink overall.
If you’ve just started losartan or your dose was recently increased, give it one to two weeks to see how you react to the drug. That should be enough time to allow your body to adjust to the medication. After this initial period, an occasional drink shouldn’t be a problem.
Are certain people at greater risk of side effects?
Some people need to be extra careful while taking losartan. If any of these apply to you, talk to your healthcare provider or pharmacist before drinking on losartan.
People with liver disease
The liver is what activates and processes losartan. However, in those with liver problems like cirrhosis or hepatitis (especially from heavy drinking), the levels of losartan in the blood may become higher than normal. That’s why the dose of losartan is usually started low (25 mg) in people with mild to moderate liver disease. Losartan should be avoided altogether in people with severe liver disease.
Older adults
Adults who are older than 65 generally clear medication from their bodies more slowly. They’re also more likely to be on other blood pressure drugs and experience more side effects from alcohol. Even just one glass of wine can lower blood pressure enough to cause unsteadiness, which could lead to falls.
People with heart failure or dehydration
For those with heart failure or experiencing dehydration, the body is working harder to maintain blood pressure. Mixing alcohol with losartan can quickly drop blood pressure, throw off electrolytes, and put increased stress on the kidneys, which could worsen heart failure and dehydration.
People on water pills or other blood pressure meds
People who take a water pill (diuretic) like hydrochlorothiazide or more than one blood pressure medication alongside losartan may be at a greater risk of severely low blood pressure (hypotension). Alcohol can act as another diuretic, which could increase the risk of dehydration, dizziness, and electrolyte problems.
It’s important to discuss any medical conditions before drinking on losartan. It’s also a good idea to tell a healthcare provider about other prescription drugs, over-the-counter medicines, and potassium supplements to reduce the risk of drug interactions.
Short-term vs. long-term alcohol use on losartan
A toast at a wedding is not the same as a few beers every night. A single drink might drop your blood pressure for a few hours, but it should rebound with no serious problems. However, heavy drinking on a daily basis is a different health risk. In fact, heavy alcohol use is one of the risk factors linked to high blood pressure.
If you already have high blood pressure, the best amount of alcohol is little to none. Studies suggest that those who drink regularly often need higher doses of blood pressure medicines to keep their blood pressure controlled. In other words, alcohol can be counterproductive when treating hypertension.
Which antihypertensives are not affected by alcohol?
No blood pressure medication is completely safe to mix with alcohol. That’s because alcohol can affect blood pressure regardless of what medication is being taken. It’s more about how much alcohol is being consumed and whether you’re just starting blood pressure treatment.
In addition to ARBs like losartan, valsartan, and irbesartan, antihypertensives like ACE inhibitors (lisinopril, enalapril, etc.), diuretics (hydrochlorothiazide, furosemide, etc.), and calcium channel blockers (amlodipine, verapamil, etc.) may have additive effects with alcohol. However, if your blood pressure is controlled with one of these medications and you only drink on occasion, the risk of serious blood pressure changes or other problems is low.
It’s important to consult a healthcare provider for medical advice if you’re considering switching medications. You’ll want to mention any specific lifestyle habits that are important to you, including drinking alcohol.
The bottom line
Losartan and alcohol don’t directly interact, but they both have effects on blood pressure that could lead to overlapping side effects. A glass of wine here and there is usually fine for most healthy adults with blood pressure under control. The problems start with regular or heavy drinking, which could increase dizziness and fall risks. Over time, heavy drinking may increase the risk of high blood pressure, heart disease, and other health conditions. If you have liver or kidney problems, you’re older, or you take other heart medications, talk to your healthcare provider or pharmacist before drinking.
- Cozaar highlights of prescribing information, Food and Drug Administration (2025)
- Drink alcohol only in moderation, Office of Disease Prevention and Health Promotion (2026)
- Effect of alcohol on blood pressure, Cochrane Reviews (2020)
- Alcohol intake and blood pressure levels: A dose-response meta-analysis of nonexperimental cohort studies, Hypertension (2023)
- Losartan potassium drug label information, DailyMed (2026)
- Losartan, LiverTox (2017)
- Alcohol intake and risk of hypertension: a systematic review and dose-response meta-analysis of nonexperimental cohort studies, Hypertension (2024)
- Alcohol consumption and its effect on antihypertensive treatment in male patients with hypertension, American Journal of Hypertension (2024)
- Medically accurate: SingleCare’s Medical Review Board analyzes all of our content to confirm it’s in line with current medical advice.
- Evidence-based: Our content is sourced from reputable U.S.-based healthcare professionals and peer-reviewed research.
- Trustworthy: All of SingleCare’s content goes through a multi-phase review process by our writers, editors, and Medical Board in order to provide clear and credible information.