Stable, ready-to-use injectable pharmaceutical compositions are provided, comprising the combination of
neostigmine,
glycopyrrolate, and a pharmaceutically acceptable liquid vehicle, optionally with additional pharmaceutically acceptable excipients. Other aspects of the invention relate to methods for making such compositions and methods of using such compositions for reversing the effects of non-depolarizing neuromuscular blocking agents. Preferably, the composition comprises
neostigmine methylsulfate,
glycopyrronium bromide, and a pharmaceutically acceptable liquid vehicle, and is provided in a pre-filled, ready-to-use sealed container, such as a pre-filled
syringe, suitable for intravenous administration.