Commonly reported side effects of cetirizine include headache, dry mouth, drowsiness, and fatigue, while more serious but rare side effects include cardiac failure, tachycardia, and edema. Discontinuing cetirizine after prolonged use (typically, use beyond six months) may result in generalized itching Formerly prescription-only in many countries, cetirizine is now available without prescription in most countries. […]

Pulmonary edema is fluid accumulation in the tissue and air spaces of the lungs. It leads to impaired gas exchange and may cause respiratory failure. It is due to either failure of the left ventricle of the heart to remove blood adequately from the pulmonary circulation (cardiogenic pulmonary edema), or an injury to the lung […]