Can a pregnant woman suffering from urinary inflammation take penicillin antibiotic? What are the side effects and risks? What about alternatives?

Penicillen. Penicillen is very safe in pregnancy and is the number one choice of antibiotic for group B beta strep prophylaxis in labor. As long as you aren't allergic to it, you should be fine. Only real issue is that you may get a yeast infection from antibiotic use.