 [ Symptoms ] can i take clindamycin if allergic to ceclor and bactrim just had a horrible reaction to bactrim doctor prescribed clindamycin but am afraid to take just wanting to make sure it will be ok [ Disease ] your pharmacist is always a good resource for these answers when you pick up your prescription but bactrim sulfa clindamycin and ceclor cephalosporin are all different and unrelated antibiotic drug classes i have no idea if you are allergic to clindamycin too but you should be able to take it this is probably why it was prescribed