1. designed to prevent or counteract sleep; promoting wakefulness
Usage: informal; often used in marketing or product descriptions

Examples

• The antisleep formula in the energy drink keeps you alert for hours.
• She took an antisleep medication before her long night shift.
• The antisleep properties of caffeine make it popular among students studying late.
• He wore an antisleep patch to stay awake during the road trip.
• The antisleep supplement promised to boost mental clarity and focus.