Couple randomly attacked, 1 stabbed, by group of teens in Toronto, police say
A man has been transported to hospital after police say he was stabbed in a random attack carried out by a group of teens in Toronto on Friday night.
Health Canada has authorized the use of Pfizer’s COVID-19 antiviral treatment Paxlovid, the first oral and at-home prescription medication to be cleared for use in this country.
The federal health agency says the prescription-only medication can be given to adults ages 18 and older to treat mild to moderate cases of COVID-19, if they have a confirmed positive test and are at a high risk of becoming seriously ill.
The authorization comes with specific instructions on scenarios in which the regime cannot be used, including to prevent COVID-19 infections or to treat patients who are already hospitalized due to severe COVID-19 cases.
The medication— two antiviral medicines co-packaged together— cannot be taken for longer than five days in a row, nor can it be given to teens or children.
“The authorization today provides a new tool the toolkit against COVID-19 at a crucial time the pandemic as we're faced with new variants. Importantly, it is a more accessible antiviral treatment for those at high risk of progression to severe COVID-19,” said Health Canada’s Chief Medical Adviser Dr. Supriya Sharma, during a technical briefing discussing Paxlovid’s authorization.
She said that while this treatment may help reduce the number of COVID-19 patients who end up in hospital, “no drug, including Paxlovid, is a substitute for vaccination,” when it comes to reducing the risk of hospitalization.
Prior to this oral medication getting authorized, the short list of Canadian-approved COVID-19 treatments had to be given in clinical settings.
“Our health-care system and hospitals face significant pressures in this ongoing pandemic, this new treatment will provide a new option in the management of COVID-19,” said Pfizer Canada’s Hospital Business Unit Lead Kevin Mohamed in a statement. “Pfizer is ready to begin delivery in Canada immediately to help get PAXLOVID into the hands of appropriate patients as quickly as possible.”
Facing calls from the provinces for a swift rollout of this medication in the face of an expected surge in Omicron hospitalizations, the federal government announced Monday that the first 30,400 full treatment courses have already arrived in the country and will be distributed this week.
“Pfizer is ready to start immediate delivery in Canada,” said Pfizer Canada spokesperson Christina Antoniou in an email.
The government has a deal in place with the pharmaceutical giant securing access to an initial one million treatment courses of the therapeutic drug this year, however given the high demand it could take some time before the complete order is fulfilled. Canada is set to receive another 120,000 over the course of February and March.
“My officials and I continue to work with Pfizer in order to finalize the delivery schedule for the remaining treatment courses and to accelerate deliveries of this highly sought after medication wherever possible,” said Procurement Minister Filomena Tassi during a press conference on Monday afternoon, declining to comment on the cost per treatment of this newly-authorized medication.
Citing the “limited global supply,” Chief Public Health Officer Dr. Theresa Tam said that Public Health Agency of Canada has communicated to the provinces and territories an interim set of guidelines for use of this new treatment while supplies are limited.
This means that provinces are being asked to prioritize giving this medication to:
Asked why the decision has been made to offer priority access to the unvaccinated, Tam said that’s because those who have not been vaccinated against COVID-19 are at higher risk of getting severely ill.
“This approach shows that we are prioritizing treatments to those most in need,” she said.
As well, first use should be prioritized for those whose infections have been confirmed and are able to start the treatment within five days of symptom onset. Tam said that if PCR testing is not available, or if results will not be available until more than five days from symptom onset, a rapid antigen test may be used.
Responding to the authorization, Conservative Leader Erin O’Toole said the federal government is “late,” despite Canada being one of the first of a handful of countries that have signed off on use of the drug.
And, while other countries have provided an emergency use authorization for the product, including the U.S. and the U.K., Canada is the first country in which the product has received a full authorization, according to Pfizer Canada.
O’Toole is also calling for further deliveries to be ramped up, but dodged a question about his position on unvaccinated Canadians being among the priority groups who can access this new treatment.
Pfizer submitted its request for authorization to Health Canada, on Dec. 1, 2021. In November 2021, Pfizer released the results of their Phase 2/3 trials for the drug, stating that they had found the pills to significantly reduce hospitalization and death in COVID-19 patients.
Pfizer said that in a randomized, double-blind study of more than 380 patients, there was an 89 per cent reduction in the risk of being hospitalized or dying of COVID-19 in patients that received Pfizer’s pill within three days of displaying COVID-19 symptoms, compared to the study group that received a placebo.
The drug giant has been submitting data to Health Canada on a rolling basis, with new information recently submitted showing its efficacy against the Omicron variant, with more data expected in the months ahead, said Sharma.
According to Pfizer, Paxlovid is designed to block the activity of an enzyme in SARS-CoV-2 that is essential for the virus to replicate itself, and also help to slow the breakdown of the pill’s ingredients in order to help combat the virus for longer.
“PAXLOVID stops the virus from multiplying. This can help your body to overcome the virus infection and may help you get better faster,” reads Health Canada’s authorization.
Paxlovid contains two medicines co-packaged together, a 150mg pink tablet of Nirmatrelvir and a 100mg white tablet of Ritonavir, which has been used in combination with other antiviral medications before.
The regime requires taking three pills taken consistently twice a day, for five days in a row. The agency has outlined on their website the detailed instructions for taking this medication, as well as a list of potential contraindications.
For example, Health Canada has issued warnings for patients with kidney or liver problems; patients with a human immunodeficiency virus (HIV) infection; patients who are pregnant, breastfeeding, or are planning to become pregnant; and patients who take a series of other commonly-used medicines which may interact with Paxlovid causing decreased drug effectiveness, or in some cases cause potentially serious effects.
Side-effects can include an altered sense of taste, diarrhea, muscle pain, vomiting, high blood pressure, and headache. Though, given the limited use of this medication to date, the agency cautions that it is possible not all side-effects are known at this time and advise speaking with a healthcare professional if other side “troublesome” effects arise.
“Health Canada’s review determined that the benefits pf Paxlovid outweigh its potential risks, but it's important to remember that inherently all drugs carry some risks, and this is no different,” said Sharma. “As a prescription medication, patients need to discuss the risks and benefits of treatment with the healthcare provider who's aware of their health conditions and other medications.”
“It's not perfect by any stretch of the imagination. It's good, and it's very useful… But it's not by any means, a panacea,” said Dr. Michael Reider with Western University’s Schulich School of Medicine in an interview with CTV News, adding that one key way that Paxlovid will be helpful is in keeping people out of ICUs, which will also help hospitals manage capacity.
“I think this is really encouraging to get our hospitals back to functioning at some level of near normal,” he said.
Health Canada has also been reviewing an experimental pill from drugmaker Merck, called molnupiravir, since mid August.
The federal government has a contract to purchase 500,000 of Merck’s antiviral medication, with an option for 500,000 more pending regulatory approval.
In late December, the U.S. Food and Drug Administration issued an emergency use authorization for both Pfizer and Merck’s drugs.
With files from CTV News’ Avis Favaro, Alexandra Mae Jones and Sarah Turnbull
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