Taking trimoptin for urinary tract infection. I'm making sure that I've at least 5 hours between antibotic and thyroid meds. I'm on them 3 days still 2 days left to take but my body is tingling legs and arms and it only started yesterday. I was having trouble with tingling in arms and legs but when I got B12 injection and supplemented with B12 all eased. Is the antibotic causing this to happen has anyone else ever experienced this. I'm still taking my B12 1 a day should I increase it or wait till I stop the antibotic.