There are genuine safety considerations involved with inhalers. Foremost is that inhalers will deliver whatever is in the medicine straight into the lungs with zero “final fractioning/sterilization” done. Final fractioning is the method we use to refine the med at point of use via heat and a dab rig or other heat source.
Distilling and extracting get us close and isolating gets us really close to final purity but the final refinement always done for inhalation is as much a sterilization of the product as it is to discard the final bits of what you do not want. In other words users that inhale always force the compound via application of heat to undergo one last evaporation with traditional modes of use.
Inhalers not so. This is the problem. One tiny botched batch or inhaler then will deliver things deep into the lungs but without the final safety net of sterilization and purification. Makers of pharma have extremely tight controls but our industry as of yet does not. Delivering medicine this way is hella technical and difficult to pull off. It is the rare drug like asthma specific types that simply cannot be administered to effect that use this mode of ingestion and ONLY because the target organ is the lung and airways itself. Our target is the bloodstream so the notion of an inhaler then as a specialized method to deliver targetted therapy is not an issue.
This is a hazardous line of research because at some point somebody will have to test it and try it. This is not what we are geared up for in this community and the possibility of harm to me outweighs the benfit of attempting such a delivery. It is fraught with peril imo.