Vaccines and Bell's palsy: A narrative review.

The association between vaccines and peripheral facial palsy (PFP), an issue that has been the subject of debate for many years, has been raised again following results of clinical trials assessing mRNA based COVID-19 vaccines. To review the available literature on this topic, PubMed was searched from inception until February 25, 2022. Inclusion criteria were case reports with documented rechallenge and comparative epidemiological studies. Cases of COVID-19 vaccine-induced PFP with available data on vaccine rechallenge were also identified from Vigibase until December 31, 2021. Of the 347 articles retrieved, 32 comparative epidemiological studies, 1 meta-analysis and 4 case reports met our criteria, of which 13 involved COVID-19 vaccines. Eight studies found an association between at least one vaccine and the occurrence of PFP, whereas 24 did not. Positive studies involved seasonal or pandemic H1N1 influenza vaccines administered parenterally (4 studies) or intranasally (1 study with a toxin-adjuvanted vaccine), BNT162b2, a mRNA COVID-19 vaccine (1 disproportionality analysis and 1 observed-to-expected analysis) and an inactivated virus COVID-19 vaccine (CoronaVac®) (1 study combining a case-control and an observed-to-expected approach). Strong evidence was found only for the intranasal influenza vaccine while other positive studies detected only a marginal association between PFP and vaccination. Of the four case reports with documented rechallenge, only two were positive and involved an influenza vaccine and tozinameran in one case each. In Vigibase, rechallenge was documented in 49 reports with 29 (59.2%) cases being negative and 20 (40.8%) positive. The available data did not confirm an excess risk of PFP after vaccination in most studies. Moreover, of the eight epidemiological studies suggesting a possible excess risk of PFP after any vaccine, three were disproportionality analyses and two observed-to excepted analyses, suggesting great caution should be taken when interpreting these results.

Covid-19 Et Vaccins À Adénovirus: Expérience Française De Suivi Renforcé De Pharmacovigilance COVID-19 and adenovirus vaccines: French experience of enhanced pharmacovigilance

Résumé Dans le cadre de la campagne de vaccination contre la COVID-19, l'Agence nationale de sécurité du médicament et l'ensemble des 31 centres régionaux de pharmacovigilance ont été mobilisés dans un dispositif exceptionnel de surveillance renforcée de pharmacovigilance des vaccins. Concernant les vaccins à adénovirus, Vaxzévria® et Jcovden®, ce dispositif national basé sur l'analyse quotidienne des cas notifiés d'effets indésirables, a permis d'identifier précocement des signaux de sécurité, certains validés depuis, d'autres encore en cours d'analyse, communs avec les vaccins à ARNm ou plus spécifiques tels que les thrombopénies thrombosantes immunitaires induites par le vaccin. Venu en complément des actions européennes et internationales, ce suivi a contribué à mieux définir le profil de sécurité de ces vaccins et conduit à redéfinir la stratégie vaccinale dans notre pays. Même si aujourd'hui ces vaccins n'ont plus de place dans la stratégie vaccinale nationale, ils restent utilisés dans d'autres pays à qui l'expérience acquise pourra être utile de même qu'elle permettra d'alimenter la réflexion sur de futures thérapeutiques faisant intervenir des vecteurs viraux.

[COVID-19 and adenovirus vaccines: French experience of enhanced pharmacovigilance]. / COVID-19 et vaccins à adénovirus : expérience française de suivi renforcé de pharmacovigilance: Pharmacovigilance française des vaccins à adénovirus.

As part of the COVID-19 vaccination campaign, the National Agency for the Safety of Medicines and Health Products and all 31 regional pharmacovigilance centers were mobilized in an exceptional reinforced vaccine pharmacovigilance surveillance system. Concerning adenovirus vaccines, Vaxzévria® and Jcovden®, this national system, based on the daily analysis of notified cases of adverse events, has allowed the early identification of safety signals, some of which have been validated, others still under analysis, common to mRNA vaccines or more specific of adenovirus vaccines such as Vaccine Induced Immune Thrombocytopenia. Complementing european and international actions, this follow-up has contributed to a better definition of the safety profile of these vaccines and has led to redefine the vaccine strategy in our country. Although today these two vaccines have no longer place in the national vaccine strategy, they are still used in other countries, where the experience acquired could be useful and will contribute to fuel the reflection on future therapies involving viral vectors.

Spontaneous reported cardiotoxicity induced by lopinavir/ritonavir in COVID-19. An alleged past-resolved problem.

The antiretroviral drug lopinavir/ritonavir has been recently repurposed for the treatment of COVID-19. Its empirical use has been associated with multiple cardiac adverse reactions pertaining to its ancillary multi-channel blocking properties, vaguely characterized until now. We aimed to characterize qualitatively the cardiotoxicity associated with lopinavir/ritonavir in the setting of COVID-19. Spontaneous notifications of cardiac adverse drug reactions reported to the national Pharmacovigilance Network were collected for 8 weeks since March 1st 2020. The Nice Regional Center of Pharmacovigilance, whose scope of expertise is drug-induced long QT syndrome, analyzed the cases, including the reassessment of all available ECGs. QTc ≥ 500 ms and delta QTc > 60 ms from baseline were deemed serious. Twenty-two cases presented with 28 cardiac adverse reactions associated with the empirical use of lopinavir/ritonavir in a hospital setting. Most adverse reactions reflected lopinavir/ritonavir potency to block voltage-gated potassium channels with 5 ventricular arrhythmias and 17 QTc prolongations. An average QTc augmentation of 97 ± 69 ms was reported. Twelve QTc prolongations were deemed serious. Other cases were likely related to lopinavir/ritonavir potency to block sodium channels: 1 case of bundle branch block and 5 recurrent bradycardias. The incidence of cardiac adverse reactions of lopinavir/ritonavir was estimated between 0.3% and 0.4%. These cardiac adverse drug reactions offer a new insight in its ancillary multi-channel blocking functions. Lopinavir/ritonavir cardiotoxicity may be of concern for its empirical use during the COVID-19 pandemic. Caution should be exerted relative to this risk where lopinavir/ritonavir summary of product characteristics should be implemented accordingly.

Genesis of an emergency public drug information website by the French Society of Pharmacology and Therapeutics during the COVID-19 pandemic.

On March 16, 2020, the French Society of Pharmacology and Therapeutics put online a national Question and Answer (Q&A) website, https://sfpt-fr.org/covid19 on the proper use of drugs during the COVID-19 pandemic. The working group 'Drugs and COVID-19' was composed of a scientific council, an editorial team, and experts in the field. The first questions were posted online during the first evening of home-confinement in France, March 17, 2020. Six weeks later, 140 Q&As have been posted. Questions on the controversial use of hydroxychloroquine and to a lesser extent concerning azithromycin have been the most consulted Q&As. Q&As have been consulted 226 014 times in 41 days. This large visibility was obtained through an early communication on Twitter, Facebook, traditional print, and web media. In addition, an early communication through the French Ministry of Health and the French National Agency for Medicines and Health Products Safety ANSM had a large impact in terms of daily number of views. There is a pressing need to sustain a public drug information service combining the expertise of scholarly pharmacology societies, pharmacovigilance network, and the Ministry of Health to quickly provide understandable, clear, expert answers to the general population's concerns regarding COVID-19 and drug use and to counter fake news.