Annual vaccination in the US against influenza A and B viruses is recommended for everyone ≥6 months old without a contraindication.1 Influenza vaccines that are available in the US for the 2022-2023 season are listed in Table 2.
COMPOSITION — All influenza vaccines available in the US this season are quadrivalent; they contain two influenza A and two influenza B virus antigens (see Table 1). Influenza A viruses are the main cause...
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A reader asked us to review use of the phosphodiesterase-5 (PDE5) inhibitor sildenafil for treatment of Alzheimer's disease (AD).
PDE5 INHIBITORS — Four PDE5 inhibitors – sildenafil (Viagra, and generics), tadalafil (Cialis, and generics), vardenafil, and avanafil (Stendra) – are FDA-approved for treatment of erectile dysfunction. Sildenafil is also available as Revatio and tadalafil as Adcirca, Tadliq, and …