There are about 3139 clinical studies being (or have been) conducted in Portugal. 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.
Researchers are looking for a better way to treat people with atrial fibrillation and prevent stroke or systemic embolism (blood clots travelling through the blood stream to plug another vessel). Atrial fibrillation is a condition of having irregular and often rapid heartbeat. It can lead to the formation of blood clots in the heart which can travel through the blood stream to plug another vessel, and like this lead to serious and life-threatening conditions, such as a stroke. A stroke occurs because the brain tissue beyond the blockage no longer receives nutrients and oxygen so that brain cells die. As strokes arising from atrial fibrillation can involve extensive areas of the brain, it is important to prevent them. Blood clots are formed in a process known as coagulation. Medications are already available to prevent the formation of blood clots. When taken by mouth (orally), they are known as oral anticoagulants (OACs) including apixaban. OACs decrease the risk of the above-mentioned serious and life-threatening conditions. The main side effect of OACs is an increase of the risk of bleeding. The study treatment asundexian is a new type of anticoagulant currently under development to provide further treatment options. Asundexian aims to further improve the standard of care with regard to the risk of bleeding. The main purpose of this study is to collect more data about how well asundexian works to prevent stroke and systemic embolism and how safe it is compared to apixaban in people with atrial fibrillation and at high risk for stroke. To see how well the study treatment asundexian works researchers compare: - how long asundexian works well and - how long apixaban works well after the start of the treatment. Working well means that the treatments can prevent the following from happening: - stroke and/or - systemic embolism. The study will keep collecting data until a certain number of strokes or embolisms happen in the study. To see how safe asundexian is, the researchers will compare how often major bleedings occur after taking the study treatments asundexian and apixaban, respectively. Major bleedings are bleedings that have a serious or even life-threatening impact on a person's health. The study participants will be randomly (by chance) assigned to 1 of 2 treatment groups, A and B. Dependent on the treatment group, the participants will either take the study treatment asundexian by mouth once a day or apixaban by mouth twice a day for approximately 9 - 33 months. Each participant will be in the study for approximately 9 - 34 months. There will be visits to the study site every 3 to 6 months and up to 7 phone calls. Those participants who do not want or are unable to have visits to the study site may join the study remotely in selected locations. The location name contains the abbreviation - DCT in such cases. During the study, the study team will: - take blood samples - do physical examinations - examine heart health using an electrocardiogram (ECG) - check vital signs such as blood pressure and heart rate - do pregnancy tests - ask the participants questions about their quality of life - ask the participants questions about how they are feeling and what adverse events they are having. An adverse event is any medical problem that a participant has during a study. Doctors keep track of all adverse events that happen in studies, even if they do not think the adverse events might be related to the study treatments.
The goal of this clinical study is to test how well the study drug, obeldesivir (formerly GS-5245), works and how safe it is in treating coronavirus disease 2019 (COVID-19) in participants that have a higher risk of getting a serious illness.
The purpose is to provide treatment with secukinumab delivered subcutaneously (s.c.) via pre-filled syringe (PFS) for participants who complete study treatment until the Week 104 of the core study CAIN457Q12301 and to obtain long term efficacy, safety and tolerability data
This study evaluates the safety, tolerability, PK, and preliminary efficacy of AZD0466 as monotherapy or in combination with other anticancer agents in patients with advanced NHL
The primary objective of this study is to evaluate the safety and tolerability of multiple ascending doses of BIIB132 administered via intrathecal (IT) injection to participants with spinocerebellar ataxia type 3 (SCA3). The secondary objective of this study is to characterize the multiple-dose pharmacokinetics (PK) of BIIB132 administered via IT injection to participants with SCA3.
Observation of humoral and cellular immune response after additional dose vaccine with different COVID-19 vaccines in ESKD patients in hemodialysis therapy.
All participants who completed the prior study to assess long-term safety, tolerability, pharmacokinetics and efficacy, and in the opinion of the investigator, continue to have a positive risk:benefit profile, will be offered to enroll in this open-label extension (OLE) study for up to an additional 24 months of treatment. Approximately 63 participants will be offered to continue at the previously received dose of Recifercept either Low Dose Medium Dose High Dose or at the therapeutic dose once it is identified. Participants will attend the clinic monthly for 24 months. Assessments include safety, blood sampling, physical examination, vital signs, anthropometric body measurements & patient/caregiver quality of life questionnaires.
Crohn's disease (CD) is a long-lasting condition causing inflammation that can affect any part of the gut. CD may cause tiredness, loose stools with or without bleeding, abdominal pain, weight loss, and fever. This study evaluates how safe and effective ABBV-154 is in participants treated for moderately to severely active CD. Adverse events and change in the disease activity will be assessed. ABBV-154 is an investigational drug being evaluated for the treatment of CD. In the induction period, there is a 1 in 5 chance that participants will be assigned to placebo. Depending on the dose received in the induction period, there is a 1 in 2 or 1 in 3 chance that participants will be assigned to placebo in the maintenance period. Around 265 participants 18-75 years of age with moderately to severely active CD will be enrolled in the study at approximately 200 sites worldwide. The study is compromised of a 12-week double-blind, placebo-controlled induction period, followed by either a 12-week double-blind re-induction period for non-responders or a 40-week double-blind placebo-controlled maintenance period for responders. In the maintenance period, responders will be randomized to receive subcutaneous placebo or ABBV-154 in 2 different doses every other week. Participants in the placebo group who are initial responders will receive ABBV-154 in the maintenance period. There may be higher treatment burden for participants in this trial compared to their standard of care due to study procedures. Participants will attend regular visits during the study at a hospital or clinic. The effect of the treatment will be checked by medical assessments, blood tests, checking for side effects and completing questionnaires.
Head and Neck Squamous Cell Carcinoma (HNSCC) is the 6th most common cancer. Most cases are diagnosed in locally advanced stages, with treatment involving multimodal approach with combinations of radiotherapy, surgery and chemotherapy. The aggressive nature of HNSCCs and treatment modalities are associated with important acute and late toxicities that often promote temporary or definitive treatment interruption and may compromised the capability to tolerate subsequent treatments. Thus, the aim of this study is to analyze the acute and long-term impact of cancer treatment on quality of life, physical and cognitive function of HNSCC patients diagnosed with a locally advanced disease.
The purpose of the study is to evaluate the efficacy of cobitolimod treatment compared to placebo in inducing clinical remission, in participants with moderate to severe active left-sided UC and to evaluate the efficacy of cobitolimod maintenance treatment compared to placebo in inducing or maintaining clinical remission at week 52, in participants with clinical response at week 6 after induction treatment with cobitolimod.