i am not sure of the reason you are taking bactrim but it is okay if you have missed just the one dose. this sulfa antibitoic has a long "half-life" so it is still in your system doing its job. go back on your regular dosage schedule when the time arrives.
what do i do if i missed one of my bactrim ds dosage? . i was supose to take it 5 hours ago its a twice a day dosage. it is a 10 day treatment and i have three more days left. what do i do if i missed one bactrim ds dosage?