Essential oils for acute cystitis: a real-world experience in primary care settings

Acute cystitis is a significant public health challenge, with escalating antimicrobial: resistance threatening conventional antibiotic therapy. Essential oils (EOs) containing bioactive compounds such as carvacrol and cinnamaldehyde, offer multi-target antimicrobial mechanisms that may provide effective alternatives while supporting antimicrobial stewardship efforts.

This real-world observational study compared the clinical efficacy of an EO-based formulation with that of standard antibiotic therapy in women with acute cystitis. 68 patients participated: Groups A (N.=24), treated with fosfomycin trometamol 3 g single-dose; Group B (N.=21) received the EO combination (OLEOBIOTIC^® Salud urinaria manufactured by Pranarom International S.A.) at the standard dose (1 capsule 3 times daily for 5 days); Group C (N.=23) received the double dosage. OLEOBIOTIC^® Salud urinaria is a food supplement manufactured by Pranarom International S.A. and formulated with EOs of oregano (Origanum vulgare) 10 mg, Chinese cinnamon (Cinnamomum cassia) 30 mg, lemon (Citrus limon) 5 mg, lemongrass (Cymbopogon citratus) 40 mg, thyme (Thymus vulgaris, thymol chemotype) 20 mg, savory (Satureja montana) 20 mg, cloves (Caryophyllus aromaticus) 10 mg, and fennel (Foeniculum vulgare) 15 mg. Primary outcomes was urinary dipstick test negativization. Secondary outcomes assessed symptom severity, patient satisfaction, antibiotic avoidance, and safety profile.

Urinary dipstick negativization rates were comparable across groups: Group A 83.3%, Group B 90.5%, and Group C 78.3% (P>0.05). All groups showed a significant improvement in urinary frequency (P<0.001), with patients urinating ≤4 times daily increasing from baseline to post-treatment: Group A from 25.0% to 70.8%, Group B from 19.0% to 85.7%, and Group C from 21.7% to 69.6%. Antibiotic prescription was avoided in 66.7-78.3% of cases. Patient satisfaction was high across all groups, with 71.4% to 100% willing to use the treatment again. Only one adverse event (self-limiting diarrhea) was reported, with no recurrences during follow-up.

EO-based formulations demonstrated clinically significant efficacy in the managing of acute cystitis, with high dipstick negativization rates, substantial symptom relief, and excellent safety profile. The multi-target antimicrobial mechanisms of key components offer theoretical advantages for reducing the development of resistance. These findings may support integrating natural treatments into clinical algorithms for uncomplicated cystitis as part of comprehensive antimicrobial stewardship strategies. Nevertheless, randomized controlled trials are needed to confirm these real-world observations.