ISSN:1172-7047    

出版商:ADIS    

年代:2003

数据来源: ADIS

摘要:

Severe psychiatric disorders (schizophrenia, bipolar disorder and major depressive disorder) cause much morbidity and disability in developing countries. Most of the evidence on the efficacy and effectiveness of drug treatments for these disorders is based on trials conducted in Western countries. Cultural, biological and health system factors may profoundly influence the applicability of such evidence in developing countries. Attitudes towards, and concepts about, psychiatric disorders vary across cultures, and these may influence the acceptability of drug treatments. Genetic and environmental factors may lead to variations in the pharmacodynamics and pharmacokinetics of psychotropic drugs across ethnic groups. This may explain why lower doses of psychotropic drugs tend to be used for non-Caucasian patients. There is a dearth of mental health professionals and care facilities in developing countries, especially in rural areas. Epidemiological studies show that, despite this lack of services, the outcome of schizophrenia is favourable in developing countries. This suggests that cultural, genetic or environmental factors may play as much of a role in influencing outcome as access to antipsychotic treatment.Regional drug policies may influence the availability and cost of psychotropic drugs. In particular, the Indian experience, where drugs are manufactured by several local pharmaceutical firms, thus bringing their cost down, may represent a unique deregulated drug industry. However, the impending impact of the Trade-Related Aspects of Intellectual Property Rights (TRIPS) agreement, with the strict enforcement of patent laws, will almost certainly lead to a rise in drug costs in the coming years. This may influence the choice and cost effectiveness of various drugs.The implications of these cross-cultural variations for policy and practice are the need to ensure a reliable supply of affordable psychotropic drugs in developing countries, trained healthcare professionals to use these drugs rationally, a concerted advocacy campaign to exclude drugs for severe psychiatric disorders from patent protection, and the development of psychosocial programmes to improve global outcomes.

ISSN:1172-7047    

出版商:ADIS    

年代:2003

数据来源: ADIS

摘要:

The phospholipids in the neuronal membranes of the brain are rich in highly unsaturated essential fatty acids (EFAs). It has been hypothesised that abnormalities of phospholipid metabolism are present in patients with schizophrenia and that the EFAs omega-3 polyunsaturated fatty acids, and eicosapentaenoic acid (EPA) in particular, may have a role in treating this illness. Considerable preclinical and clinical evidence provides support for this proposal. An epidemiological study reported a better outcome for patients with schizophrenia in countries where the diet is rich in unsaturated fatty acids. Evidence of abnormalities of EFAs has been found in erythrocyte membranes and cultured skin fibroblasts of patients with schizophrenia, and abnormal retinal function and niacin skin flush tests (markers of omega-3 polyunsaturated fatty acid depletion) have also been reported. Case reports and an open-label clinical trial reported efficacy for EPA in schizophrenia. Four randomised, controlled trials of EPA versus placebo as supplemental medication have now been reported. Two of these trials showed significant benefit with EPA on the positive and negative symptom scale total scores, whereas the other two did not show any effects on this primary efficacy measure. One study also reported a beneficial effect on dyskinesia. In the only published trial in which EPA was used as monotherapy versus placebo in schizophrenia, some evidence was found to suggest antipsychotic activity. Taken together, there is considerable evidence to suggest abnormalities of EFAs in cell membranes of patients with schizophrenia, and there is preliminary evidence that EPA is an effective adjunct to antipsychotics.

ISSN:1172-7047    

出版商:ADIS    

年代:2003

数据来源: ADIS

摘要:

Following stroke, approximately 90% of patients experience persistent neurological motor deficits that lead to disability and handicap. Both pharmacological and physical treatment strategies for motor rehabilitation may be considered. In terms of pharmacological treatment, drugs that may potentially promote motor recovery when added to a regimen of physical therapy include the stimulants amphetamine and methylphenidate, as well as levodopa and fluoxetine. Botulinum toxin A has proven effective and well tolerated in several placebo-controlled trials for the treatment of focal upper and lower limb spasticity, although it has not been shown to improve motor function. The focal injection of botulinum toxin A inhibits the release of acetylcholine into the synaptic cleft, resulting in a reversible paresis of the muscles relevant for the spastic deformity. Other drugs, such as benzodiazepines, antiepileptic drugs and antipsychotics, may have detrimental effects on motor function and should be avoided, if possible.With respect to physical strategies, modern concepts of motor learning favour a task-specific repetitive approach that induces skill-acquisition relevant to the patient’s daily life. Constrained-induced movement therapy based on the concept of learned non-use, electromyography-triggered electrical stimulation of the wrist muscles, robot-assisted motor rehabilitation to increase therapy intensity and bilateral practice to facilitate the movement of the paretic extremity are examples in upper limb rehabilitation. Lower limb rehabilitation has been enriched by treadmill training with partial bodyweight support, enabling the practice of up to 1000 steps per session; automated gait rehabilitation to relieve the strenuous effort required of the therapist; and rhythmic auditory stimulation, applying individually adjusted music to improve walking speed and symmetry.

ISSN:1172-7047    

出版商:ADIS    

年代:2003

数据来源: ADIS

摘要:

The chronic and recurrent nature of major depressive disorder is receiving increasing attention.Approximately eight of ten people experiencing a major depressive episode will have at least one more episode during their lifetime, i.e. recurrent major depressive disorder.In the 1990s, prolonged or lifelong pharmacotherapy emerged as the main therapeutic tool for preventing relapses of depression. This therapeutic approach is based on the effectiveness of antidepressant drugs compared with placebo in decreasing relapse risk and on the improved tolerability profile of the newer antidepressants compared with their older counterparts. However, outcome after discontinuation of antidepressant therapy does not seem to be affected by the duration of administration. Loss of clinical effects, despite adequate compliance, has also emerged as a vexing clinical problem.The use of intermittent pharmacotherapy with follow-up visits is an alternative therapeutic option. This leaves patients with periods free of drugs and adverse effects and takes into account that a high proportion of patients would discontinue the antidepressant anyway. However, the problems of resistance (that a drug treatment may be associated with a diminished chance of response in subsequent treatments in those patients whose symptoms successfully responded to it but who discontinued it) and of discontinuation syndromes are substantial disadvantages of this therapeutic approach.In recent years, several controlled trials have suggested that sequential use of pharmacotherapy in the treatment of the acute depressive episode and psychotherapy in its residual phase may improve long-term outcome. Patients, however, need to be motivated for psychotherapy, and skilled therapists have to be available.Despite an impressive amount of research into the treatment of depression, there is still a paucity of studies addressing the specific problems that prevention of recurrent depression entails. It is important to discuss with the patient the various therapeutic options and to adapt strategies to the specific needs of patients.

ISSN:1172-7047    

出版商:ADIS    

年代:2003

数据来源: ADIS

ISSN:1172-7047    

出版商:ADIS    

年代:2003

数据来源: ADIS