Lactin-V for Recurrent UTIs: The 2011 Trial

The comparison

After antibiotics, 100 premenopausal women were randomized 50/50 to vaginal CTV-05 or placebo. The paper required age 18–40 and a prior treated UTI within the previous 12 months; recruitment mainly used student health. Four participants lacked assessable recurrence outcomes. Culture-confirmed recurrence over ten weeks affected 7/48 versus 13/48: risk ratio 0.5, 95% confidence interval 0.2–1.2. The interval includes no benefit; prevention was not established.¹²

Interpretation

Colonization subgroups were not randomized. Adverse events: 56% versus 50%, including discharge, itching and abdominal discomfort; brief follow-up limits safety conclusions. There was no antibiotic comparator. NIH NIDDK/ORWH funded the study; authors declared no conflicts. Osel³ was a registry collaborator.¹²

Availability

Osel³ describes Lactin-V as investigational, not FDA approved or available for sale. A shop-bought probiotic with different strains or administration cannot be assumed to reproduce this product’s results. These findings do not provide instructions for treating an active infection.³

NICE⁴ calls evidence for probiotics preventing recurrent UTIs inconclusive. Its guidance places assessment and treatment of a current UTI before considering prevention. Discuss recurrence, previous urine cultures and prior antibiotic use with the clinician reviewing your options.⁴

Getting assessed

The NHS⁵ advises seeing a GP after two UTIs within six months or three within a year. Seek urgent help for UTI symptoms with fever or shivering, pain in the back beneath the ribs, blood in urine, or pregnancy. Confusion, drowsiness or difficulty speaking requires emergency help.⁵

Laugh, Sneeze, Jump includes “The Red-Flag List.” Its advice to seek assessment for persistent bladder pain, visible blood or difficulty emptying is relevant when symptoms keep returning. Record what happened, when treatment ended and whether symptoms cleared before the next episode; bring those notes to the appointment.