Lisinopril 20mg

Generic For: Prinivil / Zestril

Lisinopril 20mg (brand names Prinivil and Zestril) is an ACE inhibitor prescribed to lower high blood pressure, treat heart failure, and improve survival after a heart attack. Many patients take lisinopril alone or alongside other medicines such as amlodipine when one drug isn't enough. After a licensed provider reviews your prescription, your order ships from a licensed U.S. pharmacy.

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Buy Lisinopril 20mg Online (Prinivil, Zestril)

An ACE inhibitor for high blood pressure, heart failure, and heart attack recovery

Lisinopril 20mg Quick Facts

Drug classACE inhibitor
TreatsHigh blood pressure, heart failure, post-heart attack care
FormTablet
Typical dosingTake 1 tablet by mouth daily.
Prescription requiredYes — prescription only

What Is Lisinopril 20mg?

Lisinopril is an angiotensin-converting enzyme (ACE) inhibitor that relaxes blood vessels so blood flows more easily and the heart works less hard. It is FDA-approved to treat high blood pressure in adults and children 6 and older, as an add-on treatment for heart failure, and to improve survival after a heart attack. Because people often compare lisinopril vs amlodipine, it helps to know they work differently — lisinopril blocks a hormone pathway, while amlodipine is a calcium channel blocker — and doctors sometimes prescribe lisinopril and amlodipine together. Lisinopril 20mg tablets are taken once daily and are available only with a prescription.

What Does Lisinopril 20mg Treat?

High blood pressure (hypertension) in adults
High blood pressure in children 6 years and older
Heart failure (as adjunctive therapy)
Improving survival after acute heart attack (myocardial infarction)
Blood pressure control in combination with other antihypertensives, such as amlodipine or diuretics

Lisinopril 20mg Dosage

Hypertension: 10 mg by mouth once daily initially; usual range 20–40 mg once daily.
Heart failure: 5 mg by mouth once daily initially; titrate as tolerated up to 40 mg once daily.
Post-heart attack: 5 mg by mouth within 24 hours, 5 mg after 24 hours, 10 mg after 48 hours, then 10 mg once daily for at least 6 weeks.

Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.

Lisinopril 20mg Side Effects

Common side effects

  • Dizziness or lightheadedness
  • Dry, persistent cough
  • Headache
  • Fatigue
  • Low blood pressure (hypotension)
  • Nausea or diarrhea
  • Elevated blood potassium

Serious side effects

Stop taking this medication and seek medical attention right away if you experience:

  • Swelling of the face, lips, tongue, or throat (angioedema)
  • Fainting or severe dizziness from very low blood pressure
  • Signs of kidney problems (little or no urination, swelling)
  • High potassium symptoms (irregular heartbeat, muscle weakness)
  • Signs of liver problems (yellowing skin or eyes, dark urine)
  • Severe allergic reaction

Warnings & Interactions

Do not use during pregnancy — can cause injury or death to the fetus
Contraindicated with a history of angioedema related to ACE inhibitors
Do not combine with aliskiren in patients with diabetes
Avoid use with sacubitril/valsartan (Entresto) or within 36 hours of switching
Use caution with potassium supplements, potassium-sparing diuretics, and salt substitutes
NSAIDs may reduce effectiveness and worsen kidney function
Monitor kidney function and electrolytes during treatment

Tell your prescriber about all medications, supplements, and health conditions before starting lisinopril 20mg.

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Frequently Asked Questions

Do I need a prescription for lisinopril 20mg?

Yes. Lisinopril is a prescription-only medication in the United States. A licensed healthcare provider must evaluate you and issue a valid prescription before we can dispense it.

Amlodipine vs lisinopril — what's the difference?

Both lower blood pressure but work differently: lisinopril is an ACE inhibitor that blocks a hormone pathway that narrows blood vessels, while amlodipine is a calcium channel blocker that relaxes vessel walls directly. Your provider chooses based on your health history, other conditions, and how you respond. Neither is universally "better" — they're often equally effective options.

Can lisinopril and amlodipine be taken together?

Yes, doctors commonly prescribe lisinopril and amlodipine together when one medication alone doesn't control blood pressure. The combination targets two different mechanisms and is a well-established treatment approach. Take them exactly as your provider directs.

What are the side effects of lisinopril and amlodipine taken together?

The most common combined effects are dizziness, low blood pressure, ankle or leg swelling (mainly from amlodipine), dry cough (from lisinopril), headache, and fatigue. Serious effects like fainting or facial swelling need immediate medical attention. Report any bothersome symptoms to your provider.

What is the best time to take amlodipine and lisinopril?

Both can be taken at any consistent time of day, with or without food; many people take them together in the morning. Some providers suggest an evening dose if daytime dizziness occurs. Follow your prescriber's specific instructions and keep the timing consistent.

How does ordering and shipping work?

After you place your order, a licensed provider or pharmacist reviews your prescription and health information. Once approved, your medication is dispensed and shipped from our licensed U.S. pharmacy in discreet packaging. Contact our pharmacy team with any questions about your order.

What should I avoid while taking lisinopril?

Avoid potassium supplements and salt substitutes containing potassium unless your provider approves them, and limit alcohol, which can worsen dizziness. Tell your provider about NSAID use (like ibuprofen), and do not take lisinopril if you are or may become pregnant.