Damien is on bactrim now,and has been before. Staph is all we know of so far. The first time it was three times daily and with all hes other meds, he seemed to always have side affects.I was not told time frames for distribution either. and at first I didnt space meds out for Damien and I compiled 2 many drugs at once. He is on 1/2 tea 2x daily. And with Actigal every 8 hours 24/7,we take hours 11am and then at11pm. After a bottle. Now that I space and schedule hes meds and give them at the same time everyday,It made for a happier boy. It also makes Damien have watery stools, thats the only side affect that I noticed.When I asked the Nurse why the change in poo she said (antibiotics) can do that.So you might want to ask your doc about that. God bless.