Answer
Yes, myasthenia gravis exacerbation is listed as an undesirable effect of cefoxitin sodium, with frequency not known.
Sources for this answer
- Renoxitin 1g and 2g Powder for Solution for Injection or InfusionRenascience Pharma Ltd · emc · SmPC §4.8 Undesirable effects · Version 3Document updated
Sources checked