Dantrolene supply shortage ANZCA has been made aware of a potential for ongoing Dantrolene supply shortage. Pfizer has announced the supply shortage deadline of DANTRIUM dantrolene 20mg powder for injection until February 24 2023. Additionally, the shortage of DANTRIUM dantrolene 25m capsules is expected to last until December 31 2023. For further information on the unavailable products, click here. Under Section 19A of the Act the TGA has approved REVONTO dantrolene sodium for injection 20mg/vial and DANTRIUM (dantrolene sodium) 25mg capsules as alternatives until these shortages end. Section 19A approval information can be viewed here.