The term sidetracked indicates a situation where someone is distracted from the original topic, plan or purpose. The antonyms of side tracked can be focused, adherent, streamlined and on course. If someone is focused, they are giving their undivided attention to something, while if they are adherent, they remain committed to the plan or idea they started with. Streamlined refers to something that is efficient, not complicated, and flows smoothly. Finally, on course is an antonym of sidetracked, which means to remain on the right path, stay on track, and achieve the goal. Being sidetracked can lead to confusion, loss of productivity, and missed opportunities. Hence, it is vital to keep oneself focused, streamlined, and on course.