Table 2. Common antibiotic choices for UTI in pregnancy1.
| Antibiotic | Recommended dosage | Pregnancy Risk category |
| Nitrofurantoin | 50 to 100mg 6 hourly | B |
| Cephalexin | 250mg 6 hourly | B |
| Ampicillin | 250mg 6 hourly | B |
| Amoxycillin- clavulanic acid | 250mg 6 hourly | B |
| Amoxycillin | 500mg 8 hourly | B |
| Trimethoprim- sulfamethoxazole | 160mg 12 hourly | C |
Category B: Animal studies do not demonstrate foetal risk but no controlled study in humans. Category C: No controlled study in humans available, animals’ study revealed adverse foetal effects.