Doxylamine succinate: The ingredient present in all NyQuil formulations is that of doxylamine succinate. Its elimination half-life is approximately 10 hours in healthy adults, meaning that at 10 hours post-ingestion, 50% of the doxylamine within NyQuil will have been eliminated from systemic circulation.
phlegmon (Noun) A solid mass formed by inflamed connective tissue, such as forms around an appendix in appendicitis. Origin: phlegmone, phlegmon, inflammation beneath the skin, from .
Frothy sputum is usually a symptom of some form of respiratory distress. Frothing occurs when phlegm or mucus in the lungs combines with fluid and air, and is then coughed up by a person. This is a symptom of several serious conditions, including pulmonary edema, pneumonia, tuberculosis, and even plague.