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Santé : La pilule anti-Covid de Pfizer efficace à 89% contre les hospitalisations et décès

Pfizer a annoncé vendredi que sa pilule anti-Covid(Paxlovid) serait efficace à 89% pour prévenir le risque d’hospitalisation ou de décès, selon les premiers résultats d’essais cliniques.

Le médicament – Paxlovid – est destiné à être utilisé peu après l’apparition des symptômes chez les personnes présentant un risque élevé de maladie grave.

Cette décision intervient au lendemain de l’approbation par l’autorité britannique de réglementation des médicaments d’un traitement similaire de Merck Sharp and Dohme (MSD).

Pfizer affirme qu’elle a arrêté les essais prématurément, car les résultats initiaux sont très positifs.

L’entreprise a déclaré avoir l’intention de fournir ces résultats «dès que possible» à l’Agence américaine des médicaments (FDA) en vue d’une demande d’autorisation.

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Il s’agit du deuxième traitement de ce type à démontrer des résultats positifs, après le comprimé développé par Merck, qui a été autorisé jeudi dans un premier pays, au Royaume-Uni.

Premiers essais cliniques
Les antiviraux agissent en diminuant la capacité d’un virus à se répliquer, freinant ainsi la maladie. Facile à administrer, ces traitements représentent un complément aux vaccins pour protéger de la Covid-19.

Les premiers résultats de Pfizer sont fondés sur des essais cliniques sur un peu plus de 1.200 adultes, ayant contracté la Covid-19 et présentant un risque de développer un cas grave de la maladie. Dans les quelques jours suivant l’apparition des symptômes, certains ont reçu la pilule de Pfizer, et d’autres un placebo.

«L’analyse intermédiaire a montré une réduction de 89% du risque d’hospitalisation liée à la Covid-19 et de décès de n’importe quelle cause, comparé à un placebo chez les patients traités dans les trois jours suivants l’apparition des symptômes», a déclaré Pfizer dans un communiqué.

«Cela change la donne»
L’essai comportera au total 3.000 personnes, mais les recrutements ont désormais été stoppés «face à l’efficacité écrasante» du traitement dans les premiers résultats, a dit Pfizer.

«L’annonce d’aujourd’hui change vraiment la donne dans nos efforts mondiaux pour stopper les ravages causés par cette pandémie», s’est félicité le patron de Pfizer, Albert Bourla, cité dans le communiqué.

«Ces données suggèrent que notre traitement antiviral candidat, si approuvé par les autorités de régulation, a le potentiel de sauver des vies de patients, réduire la gravité des infections du Covid-19, et éviter jusqu’à neuf sur dix hospitalisations», a-t-il ajouté.

Le traitement de Pfizer sera commercialisé sous le nom de Paxlovid.

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