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).
Researchers determined that caffeine concentrations in white, green and black teas ranged from 14 to 61 milligrams per serving. Both 6-ounce and 8-ounce servings contained roughly the same amount of caffeine per ounce, but caffeine content rose significantly with longer steeping time.