They Can Last For Months
A Basic Very Low Dose Penicillin Released Peptidoglycans Found in Urine.
* Studies of normal volunteers who were given a single oral dose of 250 mg of penicillin VK showed that about half had detectable levels of soluble peptidoglycans in their urine up to 6 h after ingestion. This suggests that soluble peptidoglycans can be released by indigenous bacteria in detectable amounts.
Park H, Zeiger AR, Schumacher HR. Detection of soluble peptidoglycan in urine after penicillin administration. Infect Immun. 1984 Jan;43(1):139-42. doi: 10.1128/iai.43.1.139-142.1984. PMID: 6690400; PMCID: PMC263400.