The main aims of the study are; to assess the impact of the clinical pharmacist in educating the asthmatic patients about their disease, the correct use of inhalers and the factors associated with correct use of inhaler devices. The current study is a prospective cohort study. Two types of devices were evaluated metered dose inhalers (MDIs) and dry powder inhalers (DPIs). Baseline assessment of the correct handling of inhalers, extent of adherence and level of asthma control was done by using validated questionnaires. Education about asthma and training on the devices were done at the first visit. Re-assessment of correct handing, adherence and control was done at the second visit. One hundred asthmatic patients were included in this study; female patients were 52%, median age 45±13.7 years and median duration of diagnosis 20±12.2 years. Ninety six percent of patients were previously educated about the correct use of inhalers by different health care professionals' specialty. There was a significant improvement in the correct handling of inhalers after education on DPIs (p=0.005) and MDIs (P=0.005). Also there was a significant improvement in the level of control and adherence after education (P=0.005, P=0.005), respectively. In this study the result showed that patients with higher level of education gets higher correct handing scores in MDIs and DPIs at the before education (p=0.032, p=0.014), respectively. Incorrect handling of MDIs were significantly associated with frequent ED visits and hospitalizations (p=0.031, p=.039) respectively. In conclusion the role of clinical pharmacist is very effective in the correctness of inhalers technique and improving adherence along with asthma control. Repeated evaluation and training on the correct handling of inhalers is a demand.