Abstract: In many south Indian hospital, patient education by a clinical pharmacist is almost nil. The aim of this study was to assess the impact of patient education on Knowledge, Attitude, Practice (KAP) and Health Related Quality of Life (HRQoL) in asthmatics. The study also aimed to develop and validate the KAP questionnaire for asthma in south Indian set-up. Patients (n = 297) were educated on monthly basis for a period of 6 months using Global Initiative for Asthma recommended pocket guide. Impact of patient education was assessed by comparing the baseline and end visit KAP scores. On every follow-up visit, patient’s HRQoL was measured using Saint George Respiratory Questionnaire (SGRQ). The standardized cronbach’s alpha value was 0.81. The test-retest reliability was 0.89. A significant (p<0.05) improvement of KAP score was observed with respect to baseline characteristics. A significant improvement (p<0.05) in all the domains of the SGRQ score was observed from day 30 onwards. The developed KAP questionnaire was acceptable and culture fair in the tested population. Pharmacist provided patient education significantly improved patient’s KAP and HRQoL.