Knowing the potential lisinopril side effects is essential if you are among the tens of millions of Americans who take this blood pressure medication. As one of the most commonly prescribed drugs in the United States, lisinopril side effects range from a mild but persistent dry cough to rare but serious reactions that require immediate medical attention.
Lisinopril belongs to a class of medications called ACE inhibitors (angiotensin-converting enzyme inhibitors) and is used to treat high blood pressure, heart failure, and to improve survival after a heart attack. According to the CDC, nearly half of American adults have hypertension, and ACE inhibitors like lisinopril are among the most frequently prescribed treatments. The drug is available generically and is affordable, which contributes to its widespread use.
This guide covers the full range of lisinopril side effects, from the common annoyances to the rare emergencies, along with practical advice for managing symptoms and knowing when to seek medical help. For more health information, visit our conditions guide.
Common Lisinopril Side Effects
Most lisinopril side effects are mild and may improve over time as your body adjusts to the medication. According to FDA prescribing information and clinical trial data, the following side effects are most frequently reported.
Dry, persistent cough. This is the most characteristic side effect of all ACE inhibitors, including lisinopril. It affects approximately 5 to 20 percent of patients and is caused by the buildup of bradykinin, a substance that ACE inhibitors prevent from being broken down. The cough is typically dry, tickling, and non-productive. It can start within a week of beginning the medication or develop months later. The cough usually resolves within one to four weeks of stopping the medication.
Dizziness and lightheadedness. Particularly common when starting the medication or after a dose increase, dizziness affects roughly 5 to 12 percent of patients. It is often related to a drop in blood pressure, especially when standing up quickly (orthostatic hypotension). This side effect is more pronounced in patients who are also taking diuretics or are dehydrated.
Headache. Headaches are reported by approximately 4 to 6 percent of patients and are usually mild. They tend to occur early in treatment and often resolve on their own.
Fatigue. Some patients report feeling unusually tired, especially during the first few weeks of treatment. This may be partly related to the blood pressure-lowering effect, as the body adjusts to a lower pressure than it is used to.
Nausea and diarrhea. Gastrointestinal symptoms occur in a small percentage of patients but are generally mild. Taking lisinopril at the same time each day, with or without food, can help minimize these symptoms.
Increased potassium levels. ACE inhibitors can cause potassium to build up in the blood (hyperkalemia). While this usually does not cause noticeable symptoms at mild levels, it is monitored through routine blood tests. Symptoms of significantly elevated potassium include muscle weakness, irregular heartbeat, and numbness.
Serious Lisinopril Side Effects
While uncommon, some lisinopril side effects are potentially dangerous and require immediate medical attention.
Angioedema. This is the most serious risk associated with lisinopril. Angioedema is sudden, severe swelling of the face, lips, tongue, throat, or extremities. It occurs in approximately 0.1 to 0.7 percent of patients and is more common in Black patients, with studies showing a two to four times higher incidence. Angioedema can be life-threatening if it affects the throat and airway. Seek emergency care immediately if you experience swelling of the face, lips, tongue, or throat, or if you have difficulty breathing or swallowing. Angioedema can occur at any point during treatment, even after years of taking the medication without problems.
Kidney problems. Lisinopril can affect kidney function, particularly in patients who already have kidney disease, renal artery stenosis, or those taking other medications that affect the kidneys. Signs of kidney problems include decreased urination, swelling in the feet or ankles, and unexplained weight gain. Your doctor should monitor your kidney function (creatinine and BUN) and potassium levels regularly, especially when starting or adjusting the dose.
Severe hypotension. A significant drop in blood pressure can cause fainting, severe dizziness, or shock. This is most likely to occur with the first dose, in patients who are volume-depleted from diuretics, vomiting, or diarrhea, or in those with heart failure. The Mayo Clinic recommends starting at a low dose and monitoring blood pressure closely during initiation.
Hyperkalemia. Dangerously high potassium levels can cause life-threatening cardiac arrhythmias. Risk is increased in patients with kidney disease, diabetes, or those taking potassium supplements, potassium-sparing diuretics, or other medications that raise potassium. Symptoms include muscle weakness, slow heartbeat, and tingling sensations.
Liver problems. Rarely, ACE inhibitors can cause liver injury. Symptoms include yellowing of the skin or eyes (jaundice), dark urine, severe fatigue, and upper abdominal pain. Report these symptoms to your doctor immediately.
Blood disorders. Very rarely, lisinopril can cause decreases in white blood cells (neutropenia or agranulocytosis), increasing infection risk. This is more likely in patients with autoimmune diseases or those taking immunosuppressant medications.
Who Is at Higher Risk for Side Effects
Several factors can increase your likelihood of experiencing lisinopril side effects.
Black patients. ACE inhibitors are generally less effective at lowering blood pressure in Black patients as monotherapy and carry a higher risk of angioedema. The American Heart Association notes that calcium channel blockers or thiazide diuretics may be more effective as initial therapy in this population, though ACE inhibitors are still used, particularly for patients with diabetes or kidney disease.
Patients with kidney disease. Pre-existing kidney impairment increases the risk of further kidney function decline and hyperkalemia. Dose adjustments are necessary, and more frequent monitoring is required.
Diabetic patients. The combination of diabetes and ACE inhibitor use increases hyperkalemia risk. While ACE inhibitors are actually recommended for diabetic patients because they protect the kidneys, closer monitoring of potassium and kidney function is essential.
Patients on certain other medications. NSAIDs (ibuprofen, naproxen) can reduce the effectiveness of lisinopril and increase kidney risk. Potassium supplements, potassium-sparing diuretics (spironolactone, triamterene), and certain other blood pressure medications can increase hyperkalemia risk. Always inform your doctor and pharmacist of all medications you take.
Pregnant women. Lisinopril is contraindicated in pregnancy. ACE inhibitors can cause serious birth defects and fetal death, particularly when used during the second and third trimesters. If you become pregnant or are planning pregnancy, stop lisinopril immediately and contact your doctor. The FDA has assigned lisinopril a pregnancy category D rating.
Managing Lisinopril Side Effects
Many lisinopril side effects can be managed or minimized with practical strategies.
For the cough: If the dry cough is tolerable, it may be worth continuing lisinopril given its benefits for blood pressure and heart health. If the cough significantly impacts your quality of life, your doctor can switch you to an ARB (angiotensin receptor blocker) such as losartan or valsartan, which provide similar benefits without the cough. ARBs do not cause bradykinin buildup, so the cough side effect is eliminated.
For dizziness: Rise slowly from sitting or lying positions. Stay well hydrated. Avoid alcohol, which can worsen dizziness. If dizziness is persistent, your dose may need adjustment. Avoid driving or operating machinery until you know how the medication affects you.
For fatigue: Take lisinopril at bedtime rather than in the morning. This allows the initial blood pressure drop and any associated fatigue to occur during sleep. Fatigue often improves after the first few weeks as your body adjusts.
For elevated potassium: Avoid excessive intake of high-potassium foods like bananas, oranges, potatoes, and salt substitutes containing potassium chloride. Do not take potassium supplements unless your doctor specifically prescribes them. Attend all scheduled blood work appointments so your levels can be monitored.
For kidney function concerns: Stay well hydrated, avoid NSAIDs when possible, and attend regular blood work appointments. Report any changes in urination patterns or swelling to your doctor promptly.
If you are interested in complementary approaches to blood pressure management, read our guide on how to lower blood pressure naturally.
When to Call Your Doctor
Contact your healthcare provider if you experience:
- A persistent dry cough that significantly affects your sleep or daily activities
- Dizziness or lightheadedness that does not improve after the first week
- Swelling of the ankles, feet, or hands
- Decreased urination or changes in urine color
- Persistent nausea, vomiting, or diarrhea
- Muscle weakness or cramping
- Unexplained fatigue that worsens over time
- Any new or worsening symptoms after starting or adjusting the dose
Call 911 or go to the emergency room immediately if you experience:
- Swelling of the face, lips, tongue, or throat
- Difficulty breathing or swallowing
- Fainting or severe dizziness
- Rapid, slow, or irregular heartbeat
- Chest pain
- Signs of a severe allergic reaction
Never stop taking lisinopril suddenly without your doctor’s guidance. Abruptly discontinuing blood pressure medication can cause a dangerous rebound increase in blood pressure.
Frequently Asked Questions
How long does the lisinopril cough last?
The ACE inhibitor cough can begin within the first week of starting the medication or develop after months of use. If you continue taking lisinopril, the cough typically persists. Once you stop the medication or switch to an ARB, the cough usually resolves within one to four weeks. In rare cases, it may take up to three months to fully clear. If the cough is bothersome, do not wait for it to resolve on its own while on lisinopril; talk to your doctor about switching medications.
Can I drink alcohol while taking lisinopril?
Moderate alcohol consumption is generally acceptable but not ideal. Alcohol can lower blood pressure further, increasing the risk of dizziness, lightheadedness, and fainting. The Cleveland Clinic advises limiting alcohol to one drink per day for women and two for men while on blood pressure medication. Avoid drinking alcohol when you first start lisinopril or after a dose increase, as the blood pressure-lowering effect is most pronounced during these periods.
Does lisinopril cause weight gain?
Lisinopril itself does not typically cause weight gain. In fact, ACE inhibitors are considered weight-neutral medications. If you notice significant weight gain while taking lisinopril, it could indicate fluid retention, which may be a sign of worsening heart failure or kidney problems. Report sudden weight gain (more than 2 to 3 pounds in a day or 5 pounds in a week) to your doctor promptly.
Can lisinopril cause erectile dysfunction?
ACE inhibitors, including lisinopril, are among the blood pressure medications least likely to cause erectile dysfunction. Some studies suggest they may actually improve sexual function compared to other blood pressure drugs like beta-blockers and thiazide diuretics. If you experience erectile dysfunction while on lisinopril, it is more likely related to the underlying hypertension, other medications, or other health conditions than to the lisinopril itself.
What should I do if I miss a dose of lisinopril?
Take the missed dose as soon as you remember, unless it is almost time for your next dose. In that case, skip the missed dose and continue with your regular schedule. Do not take two doses at once to make up for a missed one. If you frequently forget doses, consider using a pill organizer or setting a daily alarm. Consistent dosing is important for maintaining steady blood pressure control.
The Bottom Line
Lisinopril is an effective and affordable blood pressure medication with a well-established safety profile. The most common side effect, the dry cough, is annoying but not dangerous, and alternatives exist for patients who cannot tolerate it. Serious side effects like angioedema are rare but require immediate emergency attention.
The key to safely using lisinopril is open communication with your doctor, regular monitoring of blood pressure, kidney function, and potassium levels, and knowing which symptoms require urgent attention. For most patients, the cardiovascular and kidney-protective benefits of lisinopril significantly outweigh its risks. For more health information, explore our conditions guide.