A Study to Investigate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of JNJ-54175446 in Healthy Male Participants

This will be a randomized, placebo-and comparator-controlled, double-blind, multiple dose study with JNJ-54175446 in healthy male participants. The study will consist of a Screening examination (28 to 6 days prior to dose administration), a baseline 20 mg amphetamine (AMPH) challenge at least 5 days before first dose administration, a double-blind treatment period (18 days; 11 days of dosing with JNJ-54175446, minocycline or placebo; amphetamine (AMPH)/AMPH placebo challenge sequence on Day 7 and Day 10 for each participant), and a follow-up examination between 14 and 21 days after last dose administration. The maximal study duration for each participant will not exceed 9 weeks. Safety, pharmacokinetics (PK) and pharmacodynamics of JNJ-54175446 will be primarily assessed. Safety will be monitored throughout the study.