Health Regeneration

Health in the Metro games recovers in two ways. Artyom slowly heals damage on his own over time, and medkits, packages of syringes found almost everywhere and sold in every settlement, instantly restore a large part of his health while briefly sharpening his senses, speed and heartbeat. That boost makes medkits useful in mid-combat pauses rather than before or after a fight, and since Artyom can carry only five syringes they are best saved for when they are really needed.