The aim of this study is to investigate the effects of marketing efforts (inclusive of product strength, service strength, sales strength and promoting strength) and relationship quality (comprising customer satisfaction, trust and commitment) on customer loyalty (consisting of sales performance, relationship lifespan and relationship development) in pharmaceutical industry. Based on a survey of 373 valid questionnaire responses, the results reveal that marketing efforts and relationship quality have a significant relationship with customer loyalty, and the sales strength of marketing efforts, however, does not have any direct impacts on customer trust, commitment as well as loyalty although it can facilitate customer satisfaction.