A drug delivery and drug cessation system, comprising: a portable drug delivery device comprising a drug payload, a dosage delivery device, and a first wireless transceiver; a portable control device comprising a second wireless transceiver, the portable control device being in wireless communication with the portable drug delivery device via the first wireless transceiver and the second wireless transceiver; the portable drug delivery device being configured to deliver a drug to a body of a user based on instructions received from the portable control device, wherein the portable drug delivery device is a vapor-based drug delivery device, wherein the portable drug delivery device further comprises a breath actuator and a lockout unit, wherein the breath actuator is configured to cause the dosage delivery device to deliver a supplemental dose of the drug from the drug payload, based on a determination that the user has inhaled from the portable drug delivery device, and wherein the lockout unit is configured to prevent the breath actuator from causing the dosage delivery device to deliver the supplemental dose of the drug during a predetermined period based on a determination that the supplemental dose would exceed a predetermined maximum dose of the drug for the predetermined period, wherein the breath actuator is configured to cause the dosage delivery device to deliver the supplemental dose of the drug from the drug payload, based on a determination that the user has inhaled from the portable drug delivery device, without receiving the instructions from the portable control device and contrary to any preset dosage schedules. a portable drug delivery device comprising a drug payload, a dosage delivery device, and a first wireless transceiver; a portable control device comprising a second wireless transceiver, the portable control device being in wireless communication with the portable drug delivery device via the first wireless transceiver and the second wireless transceiver; the portable drug delivery device being configured to deliver a drug to a body of a user based on instructions received from the portable control device, wherein the portable drug delivery device is a vapor-based drug delivery device, wherein the portable drug delivery device further comprises a breath actuator and a lockout unit, wherein the breath actuator is configured to cause the dosage delivery device to deliver a supplemental dose of the drug from the drug payload, based on a determination that the user has inhaled from the portable drug delivery device, and wherein the lockout unit is configured to prevent the breath actuator from causing the dosage delivery device to deliver the supplemental dose of the drug during a predetermined period based on a determination that the supplemental dose would exceed a predetermined maximum dose of the drug for the predetermined period, wherein the breath actuator is configured to cause the dosage delivery device to deliver the supplemental dose of the drug from the drug payload, based on a determination that the user has inhaled from the portable drug delivery device, without receiving the instructions from the portable control device and contrary to any preset dosage schedules.