Post-nasal drip may become worrisome if it is accompanied by symptoms such as persistent cough, severe stuffy nose, recurrent infections, blood tinged mucus, or voice changes. In severe or persistent cases of post-nasal drip, a patient may be referred to an ear, nose, and throat specialist, explains Dolan.
Caffeine is also in your chocolate. The cocoa bean contains between 0.1% and 0.7% caffeine, 0.2% being the most common amount found. Caffeine is also present in lesser amounts in the husk that surrounds the cocoa beans, usually from .05% to 0.3%.
Caffeine can be classified as an alkaloid, a term used for substances produced as end products of nitrogen metabolism in some plants. The chemical formula is C 8 H 10 N 4 O 2. Caffeine has a molar mass of 194.19 grams (6.85 ounces). It is soluble in water and in many organic solvents, and it appears in pure form as white crystals. Caffeine can be prepared by extraction from natural sources or by synthesis from uric acid.