R. Van Hulten

Discontinuation symptoms in users of selective serotonin reuptake inhibitors in clinical practice: tapering versus abrupt discontinuation

ObjectiveTapering of selective serotonin reuptake inhibitor (SSRI) therapy, as opposed to abrupt discontinuation, has been recommended by several guidelines and in the literature in order to diminish the occurrence of discontinuation symptoms. However, the evidence of a favourable effect of tapering is limited, and it is unclear how patients ought to discontinue SSRIs in daily life. The aim of this study was to examine the way in which patients discontinue SSRI therapy in clinical practice and to compare the effect of tapering with that of abrupt discontinuation on the occurrence of discontinuation symptoms.MethodsPatients (n=74) who recently discontinued SSRI therapy completed a questionnaire containing questions about discontinuation symptoms (DESS events), the prescribed SSRI, reasons for discontinuation, way of discontinuation, knowledge of discontinuation symptoms, impact on daily life and patient counseling and education. The number of DESS events was compared among groups (abrupt discontinuation versus tapering; age; male versus female; paroxetine versus other SSRIs; knowledge of discontinuation symptoms at start of therapy versus lack of knowledge).ResultsA total of 66 patients were eligible for analysis. Of all patients ending SSRI therapy, 21% abruptly discontinued therapy. There was a significant difference in the number of DESS events between abrupt discontinuation and tapering of SSRI therapy (12.0 versus 5.9). There was also a tendency for an adverse effect of lack of knowledge of discontinuation symptoms at the start of therapy on the number of DESS events (8.9 versus 5.5).ConclusionOne in five patients abruptly discontinued their SSRI therapy in clinical practice. Abrupt discontinuation caused a larger increase in the number of discontinuation symptoms than tapering. We therefore advise tapering SSRI therapy in clinical practice to prevent unnecessary adverse effects of discontinuation.

Evaluation of patients’ experiences with antidepressants reported by means of a medicine reporting system

ObjectiveTo assess experiences related to antidepressant use reported to an internet-based medicine reporting system and to compare the nature of the side effects reported by patients with those reported by health care professionals (HCPs).MethodsAll reports submitted from May 2004 to May 2005 to an internet-based medicine reporting system in The Netherlands related to the use of antidepressants were analysed. Spontaneous reports of adverse drug reactions on antidepressants from HCPs received by The Netherlands Pharmacovigilance Centre Lareb from May 2004 to May 2005 were included for comparison.ResultsOf the 2232 individuals who submitted a report to the internet-based medicine reporting system, 258 submitted a report on antidepressants. Of these, 92 individuals (36%) reported on effectiveness, 40 (16%) of whom reported on ineffectiveness, and 217 (84%) submitted a report on side effects, with 202 (78%) reporting a total of 630 side effects that were experienced as negative. Fourteen individuals (5%) reported a practical issue and four (2%) reported a reimbursement issue. Of all 630 side effects reported, 48% resulted in the patient discontinuing the antidepressant therapy; of these 29% did not inform their HCP. Of all the side effects reported, 52% were perceived as “very negative”. In comparison to the side effects reported by HCPs, patients more often reported apathy, excessive sweating, ineffectiveness, somnolence, insomnia, sexual problems and weight increase.ConclusionPatients report the ineffectiveness and side effects of antidepressant therapy as negative and leading to discontinuation of the therapy. Patients and HCPs differ in the nature of the reported side effects. Patient experiences should be included in the evaluation of antidepressant treatment in clinical practice.

The Effect of Pharmacotherapy Audit Meetings on Early New Drug Prescribing by General Practitioners

Background: New drugs are cornerstones of clinical practice. However, when included in practice in an erratic fashion, there is valid concern about uncertain risk–benefit for patients and increased healthcare expenditures. In several countries, general practitioners (GPs) and pharmacists work closely together to ensure proper use of new drugs in clinical practice. Objective: To estimate the effect of pharmacotherapy audit meetings (PTAMs) between GPs and community pharmacists on prescribing of newly marketed drugs by GPs. Methods: We conducted an observational study of new drug prescribing in a cohort of 103 GPs, working in 59 practices, from 1999 until 2003. The main outcome measures were the decisions to start therapy with a new drug or with an existing older drug from the same therapeutic category within the first 6 months after market introduction. Multilevel modeling was used for analyses. Results: Overall, in 6.1% of the decisions to start drug therapy, GPs chose the drug that was most recently introduced into the market. The GPs attending lowquality PTAMs made 1861 decisions to start therapy; in 112 (6.0%) of those decisions, a new drug was preferred over an older alternative. GPs participating in high-quality PTAMs preferred a new drug in only 3.4% of the 3138 decisions made. Compared with GPs participating in PTAMs on the highest quality level (level 4), GPS attending level 1 or level 2 PTAMs were more than twice as likely to start therapy with new drugs than with older drugs (OR 2.24; 95% CI 1.04 to 4.81 vs OR 2.31; 95% CI 1.30 to 4.09, respectively). Conclusions: PTAMs may be an effective way to control early prescribing of new drugs in general practice. For PTAMs to be effective, it is vital that GPs and pharmacists set common goals on how to optimize pharmacotherapy. This concordance should be reflected in PTAMs that result in concrete decisions with auditing of GP prescribing behavior. Pharmacists should play an active role in organizing PTAMs to increase their influence on drug prescribing.