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).
Like green tea, black tea is made from the leaves of the Camellia sinensis plant. The leaves are dried and fermented, which gives the tea a darker color and richer flavor than green tea (which does not undergo the fermentation process). Depending on how strong it's brewed, black tea contains about 50 mg of caffeine per cup.