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CSL’s Seqirus to discontinue bacterial infection drug amid generic competition

By Thomson Reuters May 27, 2026 | 2:26 AM

May 27 (Reuters) – The vaccine arm of Australian biopharmaceutical giant CSL said on Wednesday it will discontinue ​sales of an injectable ‌medicine used to treat bacterial infections, citing the availability of several generic alternatives.

CSL’s Seqirus notified the country’s medicine regulator, Therapeutic Goods ‌Administration (TGA), ​that it will progressively ⁠discontinue all strengths ⁠of Benpen injection products, beginning with the 600 milligram (mg) dose from the end of November.

“CSL Seqirus will no ​longer supply Benpen to the Australian market, due to the registration ⁠of several generic ⁠products,” the vaccine unit said.

Benzylpenicillin ​sodium, the active ingredient in Benpen, ​is an injectable antibiotic widely used ‌to treat bacterial infections following surgery and other medical procedures.

“The discontinuations are due to commercial decisions and are ⁠not related to product safety, quality or effectiveness,” the TGA said, adding that the ⁠supply of ‌the injection will continue ⁠until the existing stock is ​exhausted.

Alternative ‌Australian-registered benzylpenicillin sodium injection brands ​are ⁠expected to be available in the future, the regulator said.

(Reporting by Shivangi Lahiri in Bengaluru, Additional reporting by Shruti Agarwal; Editing by Nivedita Bhattacharjee and ​Eileen Soreng)