I'm taking 50 billion cfu probiotics with antibiotics. is this ok?

Gut Flora: Yes, it is safe to take probiotics with antibiotics. Actually there is growing evidence that it can be helpful in preventing diarrhea, a common side effect from antibiotics. Our gut generally has good bacteria (probiotic) that we need for both protection from harmful bacteria and general function for digestion. Another alternative is to eat cultured yogurt, which also has some probiotic elements.