If you miss a dose of antibiotic for your cat, try to give the next dose as close to when it was due as possible. For example, if you miss a dose of a 12-hour antibiotic by an hour or two, it might still be best to give that dose . However, if you’ve missed that dose by six or eight hours, it might be better to wait and give the next dose when it is due.
If giving a 24-hour antibiotic, still consider giving a missed dose unless it is more than eight to 12 hours overdue. If you missed giving it in the morning and give the next dose that night, continue giving future doses once a day at night instead.