But Indian drug giant Zydus Cadila says asthma is fast catching up, growing just under seven percent annually due to increasing pollution and hereditary problems.
Besides anti-asthma treatment, reparatory drugs currently dominates 13 percent of the local market.
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"Diseases like asthma, cardiovascular and diabetes is going to overtake the traditional antiviral, antibiotic market that is predominant in tropical countries like Sri Lanka because of lifestyle changes," Ganesh Nayak, Executive Director Zydus Cadila told reporters.
Nayak, is visiting Sri Lanka to promote a Zydus Cadila's new range of anti asthmatic drugs, including dry powder inhalers.