Zestril is in a class of drugs called angiotensin-converting-enzyme (ACE) inhibitors.
Zestril is used in the treatment of high blood pressure. Zestril is used to lower blood pressure, to treat congestive heart failure, and to improve the survival rate after a heart attack.

Zestril is effective when used alone or when combined with other high blood pressure medications. Zestril may also be used with other medications in the treatment of heart

Zestril contains the active ingredient lisinopril, which is a type of medicine called an ACE inhibitor.

ACE inhibitors work by blocking the action of a compound in the body called angiotensin-converting enzyme (ACE). Angiotensin is a chemical that is made by the body continuously. It narrows blood vessels and thereby maintains (elevates) blood pressure. When the enzyme is blocked by Zestril, angiotensin cannot be converted into its active form. As

Zestril can be taken with or without food. Take it exactly as prescribed. Stopping Zestril suddenly could cause your blood pressure to rise.

If you miss a Zestril dose
Take the forgotten Zestril dose as soon as you remember. If it is almost time for your next dose of Zestril, skip the one you missed and go back to your regular schedule. Never take 2 Zestril doses at the same time.

Zestril Dosage For Adults

Zestril Dosage

Possible food and drug interactions with Zestril
If Zestril is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining lisinopril with any of the following:

Indomethacin (Indocin)
Lithium (Lithonate, Eskalith)
Potassium preparations such as K-Phos and Micro-K
Water pills such as HydroDIURIL and Lasix, and others that leave potassium in the body, such as Aldactone and Midamor

Tell your doctor

Most important fact about Zestril
If you have high blood pressure, you must take Zestril regularly for it to be effective. Since blood pressure declines gradually, it may be several weeks before you get the full benefit of Zestril; and you must continue taking it even if you are feeling well. Zestril does not cure high blood pressure; it merely keeps it under control.

Zestril Special precautions if you are pregnant or breastfeeding

Side effects of Zestril cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Zestril.

More common side effects of Zestril may include:
Chest pain, cough, diarrhea, dizziness, headache, low blood pressure.

Less common or rare side effects of Zestril may include:
Abdominal pain, anemia, arm pain, arthritis, asthma, back pain, blood clot in lungs, blurred vision, breast