Copium
Copium is a gaseous drug similar to nitrous oxide and fentanyl. Upon inhalation, subjects may forget a particular event or lose memories of a certain amount of time before ingestion.
Copium isn't primarily for Patients, per se, but for civilians and non-Soysylum personnel, especially after an incident that we need to conceal. Copium being a gas makes it more versatile, because it can be used on both an individual basis or for mass distribution, similar to tear gas. Additionally, copium grenades are also available to personnel, but have a limited use case.
Copium also has a calming effect, but it isn't recommended for patients due to the afforementioned forgetfulness effect. Exceptions can be made if this effect is desirable, or as the ultimate last resort treatment. Another reason it shouldn't be used for patients is because ts effects become weaker after every subsequent dose, unless the dosage is increased or a stronger Grade Copium is used. This can only be offset if the patient doesn't take copium for 6 weeks, but including such an interval on a regimen is ineffective.