MUMBAI: Many health care workers at civic hospitals could not get their weekly dose of hydroxychloroquine (HCQS). The preventive medicine is prescribed for frontline workers against the Covid-19 infection. US president Donald Trump had asked India to export the anti-malaria drug to his country.BMC doctors, nurses, ward boys, sweepers and a few patients’ relatives at some civic hospitals were prescribed a course of HCQS 400 tablet. A civic hospital medico said doctors and others on Covid19 duty did not get the third dose.A civic official said stockists possibly hoarded it due to the US demand. BMC officials were not available for comment.