On (Jan 24, 2023) in the presence of the head of departments and lecturer a symposium entitled (Caffeine), was presented by Assitant Lecturer (Ms. Shreen Abdulkareem Musa) from the medical laboratory department, where it has been explained that  Caffeine is naturally found in the leaves and fruits of some plants. It is in coffee, black and green tea, cocoa, cola soft drinks and energy drinks. It may also be in chocolate bars, energy bars, and some non-prescription medications, such as cough syrup and slimming tablets. Guarana (a popular additive in energy drinks) is also a natural source of caffeine. Caffeine is a stimulant, which means it increases activity in your brain and nervous system. It also increases the circulation of chemicals such as cortisol and adrenaline in the body. In small doses, caffeine can make you feel refreshed and focused. In large doses, caffeine can make you feel anxious and have difficulty sleeping. Like many other drugs, it’s possible to develop a tolerance to caffeine, which means you need bigger and bigger doses to achieve the same effect.At the end of the symposium, a set of questions and answers were raised on this subject.