A method of reducing counterfeit medicaments or reducing medicament abuse is provided, the method comprising making an oral appliance for delivering a medicament to teeth and/or soft tissue areas inside an oral cavity, the oral appliance comprising an interior surface having a medicament disposed in or on at least a portion of and/or all of the interior surface of the oral appliance, the interior surface being formed to fit contours of at least the portion of the teeth and/or soft tissue areas inside the oral cavity and being configured for holding the medicament in contact with at least the portion of the teeth and/or soft tissue areas inside the oral cavity to deliver the medicament thereto. In some embodiments, the oral appliance is used in a blockchain system.