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General Practice

Effect of antidepressant drug counselling and information leaflets on adherence to drug treatment in primary care: randomised controlled trial

BMJ 1999; 319 doi: https://doi.org/10.1136/bmj.319.7210.612 (Published 04 September 1999) Cite this as: BMJ 1999;319:612
  1. Robert Peveler, clinical reader in psychological medicine (rcp{at}soton.ac.uk)a,
  2. Charles George, professor of clinical pharmacologyb,
  3. Ann-Louise Kinmonth, professor of general practicec,
  4. Michael Campbell, professor of medical statisticsd,
  5. Chris Thompson, professor of psychiatrya
  1. a Mental Health Group, University of Southampton, Royal South Hants Hospital, Southampton SO14 0YG
  2. b Clinical Pharmacology Group, Biomedical Sciences Building, Southampton SO16 7PX
  3. c General Practice and Primary Care Unit, Institute of Public Health Medicine, University of Cambridge, Cambridge CB2 2SR
  4. d School of Health and Related Research, University of Sheffield, Northern General Hospital, Sheffield S5 7AU
  1. Correspondence to: R Peveler
  • Accepted 20 May 1999

Abstract

Objectives: To evaluate two different methods of improving adherence to antidepressant drugs.

Design: Factorial randomised controlled single blind trial of treatment leaflet, drug counselling, both, or treatment as usual.

Setting: Primary care in Wessex

Participants: 250 patients starting treatment with tricyclic antidepressants.

Main outcome measures: Adherence to drug treatment (by confidential self report and electronic monitor); depressive symptoms and health status.

Results: 66 (63%) patients continued with drugs to 12 weeks in the counselled group compared with 42 (39%) of those who did not receiving counselling (odds ratio 2.7, 95% confidence interval 1.6 to 4.8; number needed to treat=4) Treatment leaflets had no significant effect on adherence. No differences in depressive symptoms were found between treatment groups overall, although a significant improvement was found in patients with major depressive disorder receiving drug doses of at least 75 mg (depression score 4 (SD 3.7) counselling v 5.9 (SD 5.0) no counselling, P=0.038).

Conclusions: Counselling about drug treatment significantly improved adherence, but clinical benefit was seen only in patients with major depressive disorder receiving doses ≥75 mg. Further research is required to evaluate the effect of this approach in combination with appropriate targeting of treatment and advice about dosage.

Key messages

  • Non-adherence is a serious problem in the treatment of depression by general practitioners

  • In this study a brief psychosocial intervention delivered by a nurse greatly improved adherence

  • Clinical benefit was apparent only in patients with major depressive episodes on higher doses of drugs

  • Counselling should be targeted at patients with symptoms of at least moderate severity and combined with therapeutic drug doses

Footnotes

  • Funding Medical Research Council (grant G9322875). Dothiepin for electromechanically monitored patients was donated by Knoll pharmaceuticals.

  • Competing interests None declared.

  • Accepted 20 May 1999
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