There are about 244 clinical studies being (or have been) conducted in Costa Rica. The country of the clinical trial is determined by the location of where the clinical research is being studied. Most studies are often held in multiple locations & countries.
This study is a prospective, randomized, controlled, paired eye, subject-masked design.
This study will evaluate the safety and efficacy of ertugliflozin (MK-8835) in pediatric participants with T2DM on metformin with/without insulin. The primary hypothesis of the study is that the addition of ertugliflozin reduces hemoglobin A1C (HbA1C) more than the addition of placebo after 24 weeks of treatment.
Otherwise healthy index patients (IP) are randomized to either baloxavir marboxil or placebo if their influenza symptoms onset was within 48 hours of screening. Their households are enrolled within 24 hours of randomization if at least 1 household contacts (HHC) have not received influenza vaccine within 6 months of screening and if all HHC screen negative for influenza infection. The main endpoints are assessed based on multiple respiratory swabs, obtained from both IP and HHC up to 9 (+/-1) days post IP randomization, and through the assessment of symptoms.
The purpose of this cross-sectional, multicenter study is to determine the prevalence of an eosinophilic phenotype of blood eosinophil count ≥ 300 cells/mm3 among severe asthma patients who attend to sites specialized in the management of severe asthma in several countries in the AstraZeneca International Region. The prevalence of an atopic phenotype and asthma control, will also be studied.
This is a multicenter, multinational, open-label study of VTS-270 to evaluate the long-term safety and tolerability of VTS-270 (2-hydroxypropyl-β-cyclodextrin) in participants transitioning from Study VTS301 (Parts A/B [NCT02534844] and Part C [NCT04958642]) with neurologic manifestations of Niemann-Pick Type C1 (NPC1) disease.
The goal of the study is to determine if mamey sapote fruit, rich in rare potentially provitamin A keto-carotenoids, is a good source of vitamin A in humans. Furthermore, it will help to compare the absorption of carotenoids between the fruit versus a "matrix-free" formulation. The objective will be accomplished by quantitation of the immediate post-prandial plasma concentrations of parent carotenoids and vitamin A metabolites from participants consuming a meal consisting of a mamey sapote fruit smoothie or a shake containing mamey sapote encapsulated carotenoids.
Fluoropyrimidines are the backbone of chemotherapy regimes used to treat metastatic colorectal cancer (CRC). These drugs act in different pathways of folate metabolism altering DNA synthesis mainly by inhibition of the tymidylate synthase. For this reaction the 5,10-methylenetetrahydrofolate acts as cofactor. It has been demonstrated that A1298C and C677T polymorphisms in the methylenetetrahydrofolate reductase (MTHFR) gene result in reduced enzyme activity that leads to reduced availability of this important cofactor. Hence, we hypothesized that the presence of these polymorphisms are related to the efficacy and toxicity of fluoropyrimidines in patients with CRC.
QT interval prolongation and neutropenia are considered to be important identified risks for ribociclib. The approved dosing regimen of ribociclib is 600 mg daily (QD) on a 3 weeks on/1 week off schedule. The purpose of the study is to explore whether a reduced dosing regimen of 400 mg ribociclib orally QD 3 weeks on/1 week off may decrease the risk of QTc prolongation without compromising the efficacy of ribociclib in combination with a non-steroidal aromatase inhibitor (NSAI) in pre- and postmenopausal women with hormone receptor-positive (HR-positive), HER2-negative advanced breast cancer (aBC) who have not received prior therapy for advanced disease.
This is a Phase III, randomized, double-blind, placebo-controlled, multi-center international study assessing the activity of durvalumab and chemotherapy administered prior to surgery compared with placebo and chemotherapy administered prior to surgery in terms of pathological complete response.
This study will evaluate the pharmacokinetics, safety, and efficacy of atezolizumab subcutaneous (SC) compared with atezolizumab intravenous (IV) in participants with locally advanced or metastatic Non-Small Cell Lung Cancer (NSCLC) who have not been exposed to cancer immunotherapy (CIT) and for whom prior platinum-based therapy has failed. The study is comprised of two parts, as follows: A dose-finding part (Part 1, Phase Ib) will aim to identify the dose of atezolizumab SC to be tested in Part 2. A dose-confirmation part (Part 2, Phase III, randomized) will aim to confirm that the dose moved forward from Part 1 yields drug exposure that is comparable to that of atezolizumab IV.