P-indopril-4 Tablet is an ACE inhibitor used to treat high blood pressure and heart failure. It can be taken alone or in combination with other medicines and should be taken on an empty stomach. It is safe for long-term use and can be improved by lifestyle changes like regular exercise, weight loss, smoking cessation, reducing alcohol intake, and reducing salt intake. Common side effects include decreased blood pressure, cough, increased potassium levels, fatigue, weakness, and dizziness. Pregnant or breastfeeding mothers should consult their doctor before taking tablets.