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.
Trial 42603ATT3004 is an open-label extension study to clinical trial 42603ATT3002 (NCT00246220). In trial 42603ATT3002 the efficacy and safety of OROS methylphenidate was assessed in adult subjects with Attention Deficit Hyperactivity Disease (ADHD). ADHD is a developmental disorder beginning in childhood and characterized by developmentally inappropriate inattention, hyperactivity and impulsiveness. Data on the number of adult patients with ADHD is limited, but it is estimated that approximately 50% of children with ADHD will have symptoms also in adhulthood. The drug tested in this trial is OROS methylphenidate. The active ingredient is methylphenidate and the tablet is designed to release the active ingredient gradually to ensure an effect, which lasts up to 12 hours. Trial 42603ATT3002 consisted of a 5-week period, where subjects were assigned to either receive placebo (empty drug) or one out of three different dosages of OROS methylphenidate. This 5-week period was followed by a 7-week period, where patients received OROS methylphenidate at their optimal dose. In study 42603ATT3004, subjects who complete 42603ATT3002 are followed for a period of at least 52 weeks to evaluate safety and tolerability of OROS methylphenidate in patients who are treated with OROS methylphenidate over a long period of time. Amendment: At the end of the open-label period of the present study 42603ATT3004, patients are enrolled into a double-blind placebo-controlled period, which lasts an additional 4 weeks. The purpose of this double-blind placebo-controlled period is to evaluate the maintenance of effect under continued treatment with OROS methlyphenidate in comparison to treatment cessation in those patients, who are randomized into the placebo-group.
To study the safety and effectiveness of several doses of PD 0348292 compared to enoxaparin in preventing blood clots in the lungs or deep leg veins of patients after knee surgery
Primary Objective : Compare the risk of occurrence of Grade3-4 cumulative peripheral sensory neuropathy (PSN) relative to cumulative dose of oxaliplatin between treatment group and placebo group. Main Secondary Objective : Compare the response rate (RR) between treatment group and placebo group in order to ensure that the efficacy of the chemotherapy is not compromised by the addition of xaliproden to the chemotherapeutic regimen. Other Secondary Objectives : study of the neurotoxicity parameters (Duration of oxaliplatin-induced PSN (G2,3,4); overall incidence of PSN during treatment; dose of onset of PSN ; incidence of dose-reduction and dose delay due to PSN; incidence of oxaliplatin treatment discontinuation due to PSN; change in Nerve Conduction Studies (NCS)) ; study of the safety profile (other than PSN) ; study of the chemotherapy efficacy (progression free survival, overall survival).
COMPASS-2 is a Phase 4, prospective, randomized, double-blind, placebo-controlled, event-driven study evaluating the effect of bosentan on the time to first confirmed morbidity/mortality event in patients with symptomatic PAH already receiving sildenafil therapy. Patients must have been receiving doses of sildenafil equal to or greater than 20 mg t.i.d. for at least 12 weeks prior to being randomized. The study continued until the predefined target number of morbidity/mortality events was reached.
The purpose of the study is to evaluate the safety and efficacy of two dose levels of Naglazyme in infants under the age of one year who have MPS VI by monitoring physical appearance, x-ray of the skeletal system and growth.
GW433908 (fosamprenavir; FPV)is a pro-drug of amprenavir (APV) which is more water soluble and can be formulated into a tablet with a reduced pill burden (four 700mg tablets of FPV versus sixteen 150mg capsules daily for APV. This study is designed to provide additional information on long term safety and tolerability of FPV containing regimens for those subjects who received FPV in previous GlaxoSmithKline studies.
The purpose of this study is to see if rosuvastatin compared to Atorvastatin is effective in treating ACS by decreasing the ApoB/ApoA-1 ratio and if starting statin within 24 h following the onset of the first symptoms is beneficial compared to placebo.
The purpose of the study is to examine the safety and effectiveness of the drug combination of Myocet, paclitaxel and trastuzumab compared to paclitaxel and trastuzumab without Myocet, as first line treatment for patients with metastatic HER2+ breast cancer.
This is a multicentre study in which women were planned to receive either the Human Papillomavirus Vaccine (HPV) vaccine or control. Under Protocol Amendment 3, study participation will last approximately 48 months and involves a total of eleven scheduled visits. Under Protocol Amendment 4, study participation will last up to 84 months and involves a maximum of seventeen scheduled visits.
To evaluate the efficacy of pregabalin compared to placebo in the treatment of posttraumatic peripheral neuropathic pain