There are about 3194 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.
To compare the therapeutic and radiographic effects and safety between etanercept, methotrexate, and the etanercept/methotrexate combination in patients with rheumatoid arthritis.
Ticagrelor is a new, reversible binding, anti-platelet medication. Anti-platelet medications work to prevent the formation of blood clots. Ticagrelor is being developed as a treatment for patients with acute coronary syndrome (ACS). ACS is a term that is used to describe both heart attacks in progress or the imminent threat of a heart attack. ACS is usually caused by the formation of a blood clot in an artery that partially or totally blocks the blood supply to a portion of the heart muscle. Ticagrelor will be compared with clopidogrel to determine which drug, when either is used in conjunction with aspirin, is better at reducing deaths from vascular causes, future heart attacks and/or strokes in patients with ACS.
The purpose of this study is to estimate the incidence rate of pure red cell aplasia (PRCA; aplastic anemia) mediated by erythropoietin (EPO) antibodies in patients who are receiving subcutaneous (s.c.) epoetin alfa (polysorbate 80 formulation) for the treatment of anemia associated with chronic renal failure (CRF), and to compare this incidence rate to the incidence rate with s.c. exposure to other currently marketed recombinant erythropoietin products (epoetin alfa, epoetin beta, darbepoetin alfa), with adjustment of duration for which the drug is given to the patient. The study will also examine the impact of the pattern of using mixed s.c. exposure to multiple erythropoietin products occurring in this patients, and the impact of the time from which the treatment is started to the onset of PRCA.
Primary purpose of this study is to compare the efficacy and safety of two different nevirapine (Viramune) dosing regimens (once daily (QD) and twice daily (BID) application) and of atazanavir/ritonavir (Reyataz/Norvir), all on an emtricitabine/tenofovir disoproxil fumarate (DF) (Truvada) background. Patients will receive either nevirapine (NVP) 200 mg twice daily, or NVP 400 mg once daily , or ritonavir-boosted atazanavir (ATZ/r), all in combination with emtricitabine (FTC) and tenofovir DF (TDF). All patients receiving NVP will start at 200 mg once daily for 2 weeks, because it has been demonstrated that this lead-in dosing regimen reduces the frequency of NVP-induced rash. At Visit 3 (Week 2), patients increase the NVP dose to either 200 mg twice daily or to 400 mg once daily. Patients receiving ATZ/r will be treated with ATZ 300 mg once daily, boosted by 100 mg ritonavir (RTV) once daily. Background antiretroviral therapy for all patients consists of one tablet of Truvada. Treatment duration is 48 weeks (primary endpoint) with an extension to 144 weeks. Patients may also participate in the metabolic sub-study, comparing NVP and ATZ/r for signs and symptoms of lipodystrophy and serum lipid/glycaemic abnormalities.
The purpose of this study is to prospectively assess the long-term outcomes (benefits and risks) associated with entecavir (ETV) therapy as compared to other antivirals approved for the treatment of chronic HBV infection. For the China substudy, patients randomized to entecavir will have safety and efficacy assessments performed during the first year of the study.
The objective of the study is to evaluate the long-term (one year) efficacy and safety of tiotropium delivered by the Respimat inhaler in patients with COPD. Specifically, the study will examine the effect of treatment on COPD exacerbations.
The purpose of this study is to evaluate the function of the bladder and urethra during urinary storage or voiding in men with signs and symptoms of benign prostatic hyperplasia treated with either placebo or tadalafil.
This phase II study addressed the use of docetaxel in combination with oxaliplatin with or without 5-FU or capecitabine in metastatic or locally recurrent gastric cancer previously untreated with chemotherapy for advanced disease. Prior to this study a pilot phase I (part I) determined the optimal dose by assessing the safety and tolerability of 2 dose levels in each arm. The optimal dose was administered in the Part II study. Participants who received the optimal dose in each treatment arm in Part I were included in the Part II analysis population. Primary objective: - To assess the time to progression (TTP) of Docetaxel in combination with Oxaliplatin with or without 5-Fluorouracil (5-FU) or Capecitabine in metastatic or locally recurrent gastric cancer previously untreated with chemotherapy for advanced disease (part II). Secondary objectives: - To establish the safety profile. - To assess the Overall Response Rate (ORR) based on the World Health Organization (WHO) criteria - To assess the Overall Survival (OS)
This 2 arm study assessed the efficacy of Mycophenolate Mofetil (MMF; CellCept) compared to cyclophosphamide in inducing a response in patients with lupus nephritis, and the long term efficacy of MMF compared to azathioprine in maintaining remission and renal function. Patients were randomized to receive either MMF (1.5 g twice daily [bid]) or cyclophosphamide (0.5-1.0 g/m^2 in monthly pulses) in the induction phase. Those patients meeting criteria for response were re-randomized for entry into the maintenance phase, to receive either MMF (1 g bid) or azathioprine (2 mg/kg/day).
The purpose of this study is to collect blood samples from SMART study participants to use in future genetic studies.