[Externally Induced Prescriptions, Degree of Agreement and ... Possibility of Change in Primary Care?]

Objective: To find whether externally induced prescriptions (EIP) condition attendance through their prevalence, quality, the degree of agreement of the PC doctor and his/her capacity to alter them.

Design: Cross-sectional study of use of indication-prescription type medicines.

Setting: Health district.

Participants: 2656 prescriptions for 678 patients interviewed.

Measurements: Each interview recorded: type of visit, age, sex, work situation, existence or otherwise of social problems and/or psychiatric pathology; doctor-patient relationship, pharmaceutical preparations (PP) prescribed and those which the patient remembers he/she is taking, indication, origin, duration, speciality of the prescribing person, agreement of the PC doctor issuing the prescription and the possibility of his/her changing it. For each prescription the following was analysed: therapeutic group, intrinsic value, time it lasts, cost and whether it is a recently marketed PP.

Main Results: 90% of visits to the doctor end in prescription. 58% of patients remember taking one or more EIP. 72% of the prescriptions analysed were externally caused. They came mostly from the public health system (66%), private medicine (20%) and self-medication (11%). There was no PC agreement with almost half these EIPs, but only 13% could be changed. The EIPs without agreement and without possibility of change were greater in: women, the elderly, people on a pension, psychiatric pathologies and in cases of bad doctor-patient relationship. The EIPs originated in health insurance companies, pharmacies, self-medication, former GPs and private doctors. They were associated with ill-defined signs and symptoms, circulatory diseases and locomotive disease. We found no significant differences in expenditure or use of PP recently put onto the market between self-medication and EIP, though there were in quality.

Conclusions: The current model of prescribing medication causes consultations to be greatly "medicinised" at the expense of EIP. Doctors only alter a small part of the EIPs they don't agree with. Longitudinal studies are needed to monitor patients to find the evolution of EIPs (withdrawal, replacement, dragging on or new external prescription).