Advise Needed: Keflex and 1st trimester pregnancy

I am about 6 weeks pregnant and my OB/GYN found bacteria in my urine. Prescribed Keflex. I am, however, worried that it may cause harm to the developing fetus, even though, I am aware that Keflex is pregnancy category B.
Please advise me regarding the possible side effects of this antibiotic on the fetus. Thank you.

[nursekim]

I took it in my first trimester for a UTI also.  It is considered the standard of care for a UTI in pregnancy.  The risk is higher for the UTI to cause problems than the medicine to cause problems.

[houseofgirls]

I took keflex during my last pregnancy a couple of times for infections.  I was in my second trimester.  I'm not sure what the possible side effects could be, but I do know that keflex is considered one of the safest antibiotics to take during pregnancy.  The infection needs to be taken care of.  The benefits of taking the keflex definately outweigh the risk (if any).

[peekawho]

Keflex is commonly prescribed if needed during the first trimester.

[lilpixie]

I took it in my fisrt trimaster.... the risk of the infection is far worse then the risk with the med.  Im now nearly 27weeks and everything is fine.  I freaked out to when i read the label... but after calling my doc he assured me it was safe to take and very unsafe to let the infection go.  so please take your meds.

[energy_train]

I was on a Z-pack when I got pregnant with my son and my doc. said not to worry at all.  I took the last pill the day I found out I was pregnant so I was obviously pregnant while taking it but didn't know but I agree with everyone else- infection is far worse!

[SNM004]

Hello: I am also on my first trimester and they found that I am a carrier for group B strep in my urine.  So my NP prescibed Cephalexin (generic for Keflex) 500MG every 6 hours for 10 days.  Do you know (or does anyone else know) if Amoxicillin is safer to take than Cephalexin (Keflex)? I am almost half way done Cephalexin but now regret not researching first before taking it.  I am also due in May! Thank you!

[Gin078]

Keflex is supposidly classified as an A grade antibiodic.  Amoxicillion is also A grade but im alergic (allergic) to Penacillion so i cant take it.  A grade meds prescrined by your GP are ok to take.  Its way better than putting more stress on your body and baby if your sick!!!  :)