Police arrested three men accused of selling thousands of pills of meth-laced “Adderall” on various darknet marketplaces and mailing them through the United States Postal Service through a fictitious business called “Professional Paper Filing Inc.” that listed a real return address of an uninvolved business. That business then told police that it was repeatedly getting packages of pills in the mail as “return to sender.”
The men face a maximum possible penalty of life imprisonment.
The issue is typically one of strength, contamination, and overall effect. Ignoring chemical differences and impurities, it’s like giving Fentanyl to someone expecting Oxycodone.
Doing that (without adjusting the dose) would likely kill them because difference in potency (and LD50) is absolutely massive. The difference in potency between Desoxyn and Adderall exists, but it’s way, way, way smaller than that. In terms of the riskiness of drugs that may be “laced” with their more-potent counterpart, they aren’t even slightly comparable.
Nobody’s going to OD and die because they accidentally got some Desoxyn in their Adderall.