Healthcare ICMR expands use of HCQ as COVID-19 prevention for frontline workers in all hospitals Updated : May 23, 2020 09:19 AM IST ICMR also said that an ECG may be done before prescribing HCQ prophylaxis or those who are already on HCQ prophylaxis before continuing it beyond eight weeks. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.