Antibiotic | Adult dose[1] | Pediatric dose*[2,3] | Notes |
Rifaximin¶ | 550 mg 3 times daily | Children and adolescents ≥12 years: Refer to adult dosing Children 3 to 11 years: 200 mg 3 times daily[4] | Preferred by UpToDate author Efficacy 61 to 78% Low systemic absorption High cost relative to other options |
Alternative antibiotics | |||
Trimethoprim-sulfamethoxazole (TMP-SMX) | 160/800 mg twice daily | 4 to 5 mg/kg of trimethoprim component per dose twice daily[5] | |
Ciprofloxacin | 500 mg twice daily | 10 to 20 mg/kg per dose twice daily | Routine use in children avoided due to potential risk of musculoskeletal toxicity (usually mild) |
Amoxicillin-clavulanate | 875 mg twice daily | 25 to 30 mg/kg daily (amoxicillin component) in 2 or 3 divided doses | |
Metronidazole | 250 mg 3 times daily | 10 mg/kg per dose twice daily | |
Doxycycline | 100 mg once daily to twice daily | Children ≥8 years and >45 kg: Refer to adult dosing Children <8 years: Not recommended | Less risk of dental staining in children with short course Use and dosing extrapolated from data with tetracycline |
Tetracycline | 250 mg 4 times daily | Children ≥8 years: 10 to 15 mg/kg per dose 3 times daily Children <8 years: Not recommended | Use in children <8 years old avoided due to risk of permanent tooth discoloration |
* Optimal antibiotic regimen(s) in children have not been established. Antimicrobial choices and doses shown are those used by the UpToDate author and some other experts when antibiotic therapy of SIBO is indicated in children[2,3]. The pediatric daily dose should not exceed the usual daily dose for adult patients. Pediatric doses listed in this table are for children ≥6 years except as noted.
¶ In patients with intestinal methane overgrowth (IMO) the author uses a combination regimen of oral rifaximin 550 mg 3 times daily with oral neomycin 500 mg twice daily for 14 days.