GIOVANI, M. G. G. THE EFFECT OF EXCESSIVE CAFFEINE THE EFFECT OF EXCESSIVE CAFFEINE CONSUMPTION ON THE STUDY FOCUS OF THIRD-YEAR MEDICAL STUDENT AT CIPUTRA UNIVERSITY : THE EFFECT OF EXCESSIVE CAFFEINE CONSUMPTION ON THE STUDY FOCUS OF THIRD-YEAR MEDICAL STUDENT AT CIPUTRA UNIVERSITY . Jurnal Medika Hutama, v. 7, n. 2 Januari, 14 Jan. 2026.