Homatropine 1% eye drops preservative free

ObjectiveWe assessed whether the administration of oral ketorolac with an analgesic provides effective pain relief during placement of an intrauterine device (IUD) in nulligravid women.MethodsWe conducted a double-blinded randomised trial in the Department of Obstetrics and Gynaecology, University of Campinas Faculty of Medical Sciences, Campinas, SP, Brazil. We randomised participants who voluntarily agreed to participate to receive either one pill containing ketorolac 20 mg together with one pill containing dipyrone 300 mg, scopolamine 6.5 µg, hyoscyamine 104 µg, and homatropine 1 mg or placebo 60 min before IUD placement. The participants and providers were blinded to the randomisation group. The primary outcome was pain assessment (measured on a 0-10 visual analogue scale) during IUD placement.ResultsWe enrolled participants and randomised them 1:1 between November 7, 2023, and January 31, 2024. We analysed 60 women in each group. There were no differences between the groups in the pain score during tenaculum placement, uterine sounding, and IUD placement, and in the overall perception of pain. However, the pain score was significantly lower 10 min after the procedure in women who received the treatment compared with women who received the placebo.ConclusionOral ketorolac associated with an analgesic administered 60 min before IUD placement was not significantly better than placebo during tenaculum placement, uterine sounding, and IUD insertion, and did not significantly reduce the overall pain perception. However, this treatment did significantly reduce pain 10 min after the procedure.Trial registrationThe trial was registered at Registro Brasileiro de Ensaios Clínicos (REBEC; in English: The Brazilian Registry of Clinical Trials) under number RBR-7phn8yv on November 6, 2023. https://ensaiosclinicos.gov.br/rg/RBR-7phn8yv.

Abstract licence: CC BY

Tropane alkaloids (TAs) are toxic compounds with potent anticholinergic effects. Herbal infusions are among the most contaminated food commodities; however, the fate of TAs after ingestion remains poorly understood. This study presents a comprehensive investigation into the absorption, and metabolism of five TAs (atropine, scopolamine, tropine, homatropine, and apoatropine) following the digestion of contaminated tea. In vitro human cell models were employed, including gastric (NCI-N87), intestinal (Caco-2:HT29-MTX), and hepatic (HEP-G2) cells. TAs were found to be highly absorbed in the intestinal epithelium, while gastric cells exhibited poor absorption. Metabolism was studied using a custom-made database, revealing that it occurs predominantly in intestinal cells, involving hydroxylation and methylation reactions. Cell metabolomics was conducted using annotation, fragment simulation, and statistical software platforms. Significant statistical differences were observed for 40 tentatively identified compounds. MetaboAnalyst 5.0 was employed to discern the most disturbed metabolic pathways, with amoniacids biosynthesis pathways and TCA cycles being the most affected. These pathways are involved in responses to cellular metabolic stress, neurotransmitter production, cellular energy generation, and the regulation of oxidative stress response. The findings of this study enhance our understanding of the fate of TAs after ingestion, their metabolization and their effects at the cellular level.

Abstract licence: CC BY-NC-ND

A method was developed for the determination of tropane alkaloids (TAs), including atropine, scopolamine, anisodamine and homatropine in buckwheat and related products. This work presents an optimised methodology based on QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) extraction procedure followed by ultra-high performance liquid chromatography combined with time-of-flight mass spectrometry for the determination of TAs (atropine, scopolamine, anisodamine and homatropine) in buckwheat samples. The analytical methodology was successfully validated, demonstrating good linearity, low limit of quantification, repeatability (RSDr R < 19%) and recovery (74-113%). Finally, 13 commercial samples of buckwheat were analysed and the results demonstrated that they were in compliance with the current European regulations regarding TAs.

Abstract licence: CC BY