Sertraline should not be taken with or within two weeks of taking monoamine oxidase inhibitors (MAOIs). These include phenelzine (NardilÂ®), tranylcypromine (ParnateÂ®), isocarboxazid (MarplanÂ®), rasagiline (AzilectÂ®), and selegiline (EmsamÂ®).
Pure caffeine is a white, tasteless substance that makes up as much as 5% of. the weight of tea leaves. By structure, caffeine is closely related to the purine bases, guanine and adenine, found in deoxyribonucleic acids (DNA).
In 1820, caffeine was first isolated from coffee and seven years later in 1827 from tea and named theine. Soon after this, researchers found out that the properties of coffee and tea to change moods and behaviour is actually owing to the presence of caffeine in these substances.ACK 1 2 3 4 NEXT. Unadulterated caffeine appears like a white powdery substance something similar to cornstarch and tastes bitter. The white coffee powder is somewhat soluble in water at body temperature and dissolves completely in water when heated to boiling point.