In Australia the primary targets of drug promotion are doctors, who may be provided with gifts, offers of travel, and other inducements to prescribe.1 More subtle promotion may include educational activities, drug samples and drug familiarisation schemes, and support for the practice such as providing a nurse to collect data.
Even though doctors generally deny that they are influenced by such approaches,2,3 there is overwhelming evidence that advertising influences prescribing behaviour. Physicians who attend pharmaceutical events are more likely to use the products of the sponsors, even in the absence of reliable and credible evidence in their favour.4,5 Promotional activities in general lead to increased prescribing of drugs, acceptance of commercial rather than scientific views, a propensity to engage in non-rational prescribing behaviour,6,7,8 and biases in favour of a company's drugs.9,10
While research undertaken by industry is often rigorous and well conducted, it may be driven by commercial imperatives leading to biased presentation and interpretation of results.11,12 Protocols and methodologies may reflect and support intended outcomes rather than disinterested inquiry.13
Perhaps of even greater concern is the well documented fact that industry interests substantially influence the social agenda relating to the understanding of health and disease, sexuality, body image and lifestyles.14,15
What is special about drug promotion?
Concern about the role and influence of the pharmaceutical industry is heightened because of the special features of medicines compared to other commercial products. The consumers of medications are often extremely vulnerable, for the obvious reason that their health may be at stake in using a product. Decisions about what drugs to use are often taken not by them alone but by their medical practitioners, whose interests are not always identical to those of their patients.
For prescription drugs, medical practitioners have great influence and are charged with the responsibility of balancing patients' needs and the public interest. They have knowledge and expertise to assess the scientific evidence, and access to the specific contextual details of medical need in particular cases.
For over-the-counter products, pharmacists advise patients and directly benefit from making a sale. They may also be offered incentives to stock particular brands.
The ongoing debates about the role and power of the drug industry in the popular media16,17,18 have no doubt influenced community attitudes, although it is difficult to determine just what impact these may have had. While some consumer groups have expressed suspicion and hostility to the industry, other groups have emphasised the importance of improved co-operation and development of active collaborations.19 Public scepticism may help to control doctors' dealings with industry, but may also damage the doctor-patient relationship.
Physicians need to be aware of the evidence about the impact of advertising on behaviour and community perceptions. While bans on the provision of information by drug companies are inappropriate, high levels of critical awareness, supported by educational programs, are needed by clinicians.
In many countries, including Australia, the purchase of medications is heavily subsidised from public funds. The prescriber therefore does not directly bear the cost of their decisions.