The impact of direct-to-consumer advertising on the New Zealand health system was reviewed during 2003 by a group including professors of general practice from all of New Zealand's four Schools of Medicine.2 Their report summarised the international evidence on the economic significance of direct-to-consumer advertising, its role in consumer education and its implications for medicine use and safety. It also included surveys of general practitioners' and consumers' views on direct-to-consumer advertising.
The review found that spending on direct-to-consumer advertising is growing exponentially. In the USA in 1995 US$375 million was spent on direct-to-consumer advertising, rising to over US$2.7 billion in 2001. This spending represented nearly one third of the total spending on drug promotion in the USA. There was a corresponding increase in sales of prescription drugs. Between 1999 and 2000 sales increased by US$20.8 billion and the 50 medicines with the highest advertising budgets accounted for nearly half of this increase. These trends are mirrored in New Zealand. In 2001-02 four heavily advertised drugs accounted for almost a quarter of the increase in the dispensing of pharmaceuticals listed on the Pharmaceutical Schedule.
Patients' requests for medicines are a powerful driver of prescribing decisions. In New Zealand 69% of the general practitioners who responded to a survey reported that they had been under pressure from their patients to prescribe advertised medicines, even if they felt that these medicines offered little added benefit over drugs they would normally use.2
Direct-to-consumer advertising commonly contains misleading, inaccurate or unbalanced information. In New Zealand a survey of three months of advertisements found that 31% of all direct-to-consumer advertisements, including five out of six television advertisements, were in breach of the Medicines Act. In the USA, between 1997 and 1999, 52% of direct-to-consumer advertisements were found to be in violation of the Food, Drug and Cosmetics Act. A US survey showed that printed direct-to-consumer advertisements commonly failed to provide a quantitative description of a drug's benefits, but mainly included emotional appeals and tended to promote the medicalisation of normal health and minor illnesses.3 The New Zealand review concluded that direct-to-consumer advertising does not provide consumers with objective information on risks, benefits and options of treatment and is a serious risk to the sustainability of health systems. The reviewers have called for a ban of direct-to-consumer advertising in New Zealand.2 This is now under consideration.4
De facto direct-to-consumer advertising in Australia
In Australia, the Code of Conduct of Medicines Australia (previously the Australian Pharmaceutical Manufacturers Association) complements the legislative requirements and prohibits direct-to-consumer advertising. The Code has a number of loopholes, however, that allow companies to subvert the ban on direct-to-consumer advertising.
The Code of Conduct relies mainly on spontaneous complaints, and voluntary compliance by drug companies. Drug companies can advertise prescription products to the public until they get 'caught', if by chance somebody bothers to send a complaint to Medicines Australia. This happened last year when Sanofi-Synthelabo advertised their hypnotic zolpidem in the Qantas magazine in October 2002. A complaint was lodged, the company was found to have breached the code and was fined $50 000. In the meantime, the illegal advertisement may have been seen by thousands of Qantas travellers.
De facto direct-to-consumer advertising increasingly occurs in the form of advertisements about specific diseases and conditions, which do not mention the name of a drug, but may include the company name or their logo. For example, Roche has conducted an extensive advertising campaign for orlistat, which is marketed for weight loss. The campaign included television advertisements, advertisements in magazines, glossy brochures displayed in community pharmacies, a free call number and a web site (www.loseweightgainlife.com.au).
In this campaign the public was told the story of 'Linda' who took a 'life-changing decision' and states 'I spoke to my doctor about modern innovative approaches to weight loss. That was 18kg ago!'. Other advertisements showed photos of Linda at the swimming pool and stated 'Two years on and Linda is 30 kilos lighter and a whole lot wiser'. Concurrent mailings to doctors inform them about the 'Lose Weight Gain Life Program' which is in its '3rd successful year' and includes reproductions of consumer advertisements and a letter with the logo 'Xenical Lose Weight. Gain Life'. The advertisements to consumers do not mention the name of the drug and so are not banned under the current Medicines Australia Code of Conduct. The benefits of orlistat are exaggerated as a systematic review of the clinical effectiveness of orlistat found that the mean weight loss observed with orlistat was only 3.2 kg more than with placebo after two years.5 The advertising campaign does not link with national initiatives, such as Active Australia, which encourage participation in physical activity. This campaign may raise false hopes in many people and may put general practitioners under great pressure to prescribe orlistat even if not clinically appropriate.
Sildenafil has also been the focus of extensive campaigns in Australia. Pfizer has indirectly promoted sildenafil by using celebrity endorsements in newspaper and television advertisements featuring the legendary soccer player Pelé urging men to consult a doctor about erection problems.