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Despite the extant literature on purchasing behaviour, little is known about why and how consumers purchase and use pharmaceutical products in Malaysia. This paper aims to develop a holistic model that articulates the factors underlying pharmaceutical product purchase and use and their relationships.

Drawing upon the grounded theory approach, in-depth interviews and analysis on the basis of theoretical saturation were conducted. Enumerators, trained to perform interviews, the transcription and content analysis, sampled 120 Malaysian consumers in the first phase and 40 in the second. ATLAS.ti was used to assist the coding and analytical process.

The findings largely support extant literature on purchasing decisions. Particularly, the evaluation of product attributes was found to be an immediate determinant of purchase and use. The effect, in turn, was moderated by personal factors and facilitating conditions. The need for healthcare products and the knowledge about them were constructed as antecedents in the model. The study also highlights that consumers’ purchase and use of pharmaceutical products could be better understood and managed with a holistic view of the decision-making process.

This study proposes the conbe-hepro model to explicate the antecedents and determinants of consumers’ purchase and use of pharmaceutical products in the Malaysian context. It provides a theoretical grounding that enriches our knowledge of the changing behaviour of consumers in healthcare literature. It also yields practical insights to the government bodies and the healthcare providers in Malaysia and other developing countries.