Yes, amlodipine and lisinopril can be taken together safely. This is one of the most well-studied and widely prescribed two-drug combinations for high blood pressure. The 2025 guidelines from the American Heart Association and American College of Cardiology list an ACE inhibitor (like lisinopril) paired with a calcium channel blocker (like amlodipine) as a recommended initial combination therapy for people whose blood pressure is significantly above target.
Why These Two Drugs Work Well Together
Amlodipine and lisinopril lower blood pressure through completely different pathways, which is exactly why the combination is so effective. Amlodipine relaxes the smooth muscle in your blood vessel walls, allowing them to widen. Lisinopril blocks the production of a hormone called angiotensin II, which normally tightens blood vessels and tells your kidneys to hold onto sodium and water.
Because these mechanisms are complementary, the combination produces a stronger blood pressure drop than either drug alone. Clinical trials have confirmed a “marked additional effect” on blood pressure when the two are used together compared with either as a single medication. The blood pressure reduction from the combination is also long-lasting, maintaining its effect throughout the full dosing period.
Cardiovascular Benefits Beyond Blood Pressure
The case for this pairing goes beyond simply lowering numbers on a blood pressure cuff. A landmark trial published in the New England Journal of Medicine, known as the ACCOMPLISH trial, compared an ACE inhibitor plus amlodipine against an ACE inhibitor plus a diuretic (water pill) in over 11,000 high-risk patients. The ACE inhibitor plus amlodipine group had a 19.6% lower relative risk of major cardiovascular events, including heart attack, stroke, and cardiovascular death. The combination also reduced the risk of death from cardiovascular causes, nonfatal heart attack, and nonfatal stroke by about 21% compared with the diuretic-based pairing.
These results are a key reason current guidelines favor the ACE inhibitor plus calcium channel blocker combination, particularly for patients at higher cardiovascular risk.
A Bonus: Less Ankle Swelling
One of amlodipine’s most common side effects is peripheral edema, the puffy, swollen ankles that lead many people to stop taking it. Adding lisinopril actually helps with this problem. A large analysis of 25 randomized trials covering more than 17,000 patients found that combining a calcium channel blocker with an ACE inhibitor reduced the incidence of ankle swelling by 38% compared to taking the calcium channel blocker alone. Even more striking, the number of people who had to stop their medication because of edema dropped by 62%.
ACE inhibitors like lisinopril were more effective at reducing this swelling than ARBs (a related class of blood pressure drugs), making lisinopril a particularly good partner for amlodipine if edema is a concern.
Who Should Avoid This Combination
The main restriction comes from the lisinopril side. ACE inhibitors should not be used during the second and third trimesters of pregnancy. They can cause dangerously low levels of amniotic fluid, which may lead to poor lung and kidney development in the fetus, skull bone abnormalities, restricted growth, and in severe cases, fetal death. ACE inhibitors can also cause low blood pressure and kidney failure in newborns. If you’re pregnant or planning to become pregnant, your doctor will typically switch you to a different medication.
People with certain kidney conditions, particularly narrowing of the arteries that supply both kidneys, need careful evaluation before starting lisinopril. The drug changes how blood flows through the kidneys, and in susceptible patients this can temporarily raise creatinine levels (a marker of kidney function).
Blood Tests to Expect
When you start lisinopril, whether alone or in combination with amlodipine, your provider will typically check your kidney function and potassium levels within three days to one week. Lisinopril can raise potassium by reducing the hormone signal that tells your kidneys to excrete it. For most people this shift is minor and even beneficial, but it needs monitoring, especially if you already have kidney issues or take potassium supplements.
Amlodipine doesn’t carry the same kidney or potassium concerns, so the monitoring schedule is driven almost entirely by the lisinopril component.
When to Take Them
Both amlodipine and lisinopril are taken once daily, and they can be taken at the same time. Some evidence suggests that bedtime dosing may be more effective at controlling overnight blood pressure. Across multiple trials, about 86% of ACE inhibitor studies and 73% of calcium channel blocker studies found a greater reduction in nighttime blood pressure when the medication was taken at bedtime rather than in the morning. Nighttime blood pressure is an important predictor of cardiovascular risk, so this timing could matter for some patients.
That said, the most important factor is consistency. Taking your medications at the same time every day matters more than whether that time is morning or night. If one timing causes side effects like dizziness or if you tend to forget evening doses, adjust accordingly.
How Response Varies Between People
Individual responses to each drug differ based on a few factors. Amlodipine tends to produce larger blood pressure reductions in people who start with higher readings. Lisinopril’s effectiveness correlates with a person’s baseline renin activity, a hormonal measure that varies by age, ethnicity, and salt intake. Black patients, for example, tend to have lower renin levels and may not respond as well to lisinopril alone. However, when the two drugs are combined, this gap largely disappears, and Black patients respond similarly to the combination as other groups.
This is another practical advantage of the pairing: the calcium channel blocker component compensates for situations where the ACE inhibitor alone might underperform, making the combination more reliably effective across a broader population.