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How soon after starting Zestril will my symptoms improve?

Zestril (lisinopril) typically begins lowering blood pressure about one hour after you take it; the effect peaks at about six hours. But it may take two to four weeks for Zestril to achieve its full effect.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.