Stimulants Does Dexmethylphenidate degrade rapidly in water like Methylphenidate does?

[MasterKeeks]

A nasal spray seemed like the perfect idea until I found out methylphenidate is destroyed in water basically after a day.

 

[Shinji Ikari]

methylphenidate is destroyed in water basically after a day.

It is? I've never heard that before but I had a google and found this

Stability of extemporaneously prepared preservative-free methylphenidate 5 mg/mL intravenous solution - PMC

To advance the implementation of consciousness-promoting therapies in patients with acute disorders of consciousness, the availability of potential therapeutic agents in formulations suitable for administration in hospitalized patients in the ...

pmc.ncbi.nlm.nih.gov

Either way dexmethylphenidate is 50% of methylphenidate so it's fair to assume that if the latter is unstable in solution then the former will be too.