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Two Indian drugmakers to end trials of generic Merck pill for moderate COVID-19

WorldOct 08, 2021 05:30PM ET
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© Reuters. FILE PHOTO: An experimental COVID-19 treatment pill called molnupiravir being developed by Merck & Co Inc and Ridgeback Biotherapeutics LP, is seen in this undated handout photo released by Merck & Co Inc and obtained by Reuters May 17, 2021. Merck & Co I

By Shivani Singh, Anuron Kumar Mitra and Neha Arora

BENGALURU (Reuters) - Two Indian drugmakers have requested permission to end late-stage trials of their generic versions of Merck & Co's promising experimental oral antiviral drug molnupiravir to treat moderate COVID-19, a week after Merck said its own trial had succeeded for mild-to-moderate patients.

Merck earlier this year suspended its own development of molnupiravir as a treatment for hospitalized COVID-19 patients since many of them have reached a phase of the disease that is too late for an antiviral drug to provide much help.

The Indian companies - Aurobindo Pharma Ltd and MSN Laboratories - did not exclude hospitalized patients in designing their moderate COVID-19 trials, according to study documents, although it was not known if the trials ultimately included people in the hospital.

Merck spokesperson Melissa Moody said Merck and the Indian companies had defined “moderate” disease differently.

Merck's trials are based on U.S. Food and Drug Administration definitions, which for moderate COVID-19 describe blood oxygen levels as no lower than 93%. It defines blood oxygen levels for severe COVID-19 as 93% or lower.

The trials in India define moderate COVID-19 blood oxygen levels as 90% to 93%, according to the trial documents for the two companies.

Aurobindo and MSN are continuing to conduct studies of molnupiravir in patients with mild COVID-19 who have not been hospitalized, according to trial documents and the website of the Indian drug regulator's internal expert committee.

Merck and partner Ridgeback Biotherapeutics last week said molnupiravir had nearly halved the risk of hospitalization or death in at-risk non-hospitalized patients with mild-to-moderate COVID-19, results hailed by experts as potentially a major advance in fight against the illness.

The Indian drug regulator's committee also disclosed on its website that Aurobindo and MSN had presented interim clinical trial data for moderate COVID-19 patients and asked to end the trials.

A source with the Drug Controller General of India said the pill has not shown "significant efficacy" against moderate COVID-19, though it was having success against mild cases.

An Aurobindo spokesperson did not comment on the effectiveness of the drug in its trial. The spokesperson said the company had "faced challenges in patient recruitment at this juncture" for its trial in moderate COVID-19 patients, adding "we are evaluating the further course of action."

Aurobindo started the planned 100-patient trial of its generic version of the Merck pill against moderate COVID-19 in August, and is also running a trial that hopes to include 1,200 patients testing the pill against mild disease.

MSN did not respond to a request for comment.

INDIA TRIALS

Merck, whose shares closed down 1.6% at $80.63, has entered into voluntary licensing agreements with at least eight Indian drugmakers for molnupiravir, with an aim to turn the South Asian nation into a manufacturing hub for the drug to supply low- and middle-income nations.

Five of the eight Indian companies - Dr Reddy's Laboratories (NYSE:RDY), Cipla, Sun Pharma, Torrent Pharmaceuticals and Emcure Pharmaceuticals - are conducting a joint trial for the antiviral drug only in mild COVID-19 patients in an outpatient setting.

The other licensed company, Hetero, in early July announced interim data from its own late-stage trial of generic molnupiravir in mild COVID-19 patients and submitted an application to regulators for its emergency use.

Hetero is separately conducting a study on moderate COVID-19 patients and has said those results will be presented at a future date.

Two Indian drugmakers to end trials of generic Merck pill for moderate COVID-19
 

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