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).
A 2009 study comparing one sample of white, green, black, oolong, and yellow tea found the white tea to be highest in caffeine; the study used white peony tea, a typical example of white tea.[5] Further sources for studies of caffeine content of specific teas can be found on our article on tea and caffeine.