The FDA has licensed Penbraya (Pfizer), a pentavalent polysaccharide conjugate meningococcal vaccine, for prevention of invasive meningococcal disease caused by Neisseria meningitidis serogroups A, B, C, W, or Y (MenABCWY) in persons 10-25 years old. Penbraya is the only meningococcal vaccine that contains all five of these serogroups. Two quadrivalent polysaccharide conjugate meningococcal vaccines containing serogroups A, C, W, and Y (MenACWY; Menveo, MenQuadfi) and two meningococcal serogroup B vaccines (MenB; Bexsero, Trumenba) are available in the US (see Table...

The US Food and Drug Administration recently licensed a new Salk-type injectable polio vaccine (Poliovirus Vaccine Inactivated - Connaught) that is more potent in its antigenicity than any other inactivated polio vaccine (IPV) previously available in the USA. Live oral polio vaccine (OPV) has been the preferred vaccine for routine immunization in the USA since the early 1960's. Its advantages over IPV have included ease of administration, superior immunogenicity, induction of gastrointestinal immunity, increased immunization through spread of vaccine virus to unimmunized susceptible ...

Some readers have asked why the June 2009 issue of Treatment Guidelines (Antimicrobial Prophylaxis for Surgery) did not recommend use of ertapenem (Invanz) for prevention of infection after elective colorectal surgery. Ertapenem is a broad-spectrum carbapenem that has been approved for such use by the FDA. Medical Letter consultants do not recommend use of broad-spectrum drugs such as ertapenem, third-generation cephalosporins such as cefotaxime (Claforan), ceftriaxone (Rocephin), cefoperazone (Cefobid), ceftazidime (Fortaz, and others) or ceftizoxime (Cefizox), or fourth-generation...

The FDA has approved fixed-dose combinations of metformin with either canagliflozin (Invokamet) or dapagliflozin (Xigduo XR) for treatment of patients with type 2 diabetes not adequately controlled with any one of these drugs, or in those already being treated with both metformin and either canagliflozin or dapagliflozin.

Casimersen (Amondys 45 – Sarepta), an IV antisense oligonucleotide, has received accelerated approval from the FDA for treatment of Duchenne muscular dystrophy (DMD) in patients who have mutations of the dystrophin gene that are amenable to exon 45 skipping (DMD-45), which occur in ~8% of DMD cases. Casimersen is the first drug to be approved for this indication and the fifth to be approved for treatment of DMD; the IV antisense oligonucleotides eteplirsen (Exondys 51), golodirsen (Vyondys 53), and viltolarsen (Viltepso) and the oral corticosteroid deflazacort (Emflaza) were...

The FDA has expanded the Emergency Use Authorizations (EUAs) for the mRNA-based COVID-19 vaccines manufactured by Pfizer/BioNTech (Comirnaty) and Moderna (Spikevax) to include administration of a third dose in persons ≥12 years old (Pfizer/BioNTech) or ≥18 years old (Moderna) who have undergone solid organ transplantation or have a condition that compromises the immune system to a similar extent (see Table 1).

Elranatamab-bcmm (Elrexfio – Pfizer), a bispecific B-cell maturation antigen (BCMA)-directed CD3 T-cell engager, has been granted accelerated approval by the FDA for treatment of relapsed or refractory multiple myeloma in adults who received ≥4 prior lines of therapy, including a proteasome inhibitor, an immunomodulatory drug, and an anti-CD38 monoclonal antibody. Accelerated approval was based on the response rate and durability of response. Elranatamab is the second bispecific BCMA-directed CD3 T-cell engager to be approved for this indication; teclistamab (Tecvayli) was the...

Lazertinib (Lazcluze – Janssen Biotech), an oral kinase inhibitor, has been approved by the FDA for use in combination with the EGFR-MET bispecific antibody amivantamab (Rybrevant) for first-line treatment of locally advanced or metastatic non-small cell lung cancer (NSCLC) in adults with epidermal growth factor receptor (EGFR) exon 19 deletions or exon 21 L858R substitution mutations. This is the first approval for Lazcluze; amivantamab was previously approved for use alone and in combination with carboplatin and pemetrexed for treatment of NSCLC with EGFR exon 20 insertion...

Revumenib (Revuforj – Syndax), an oral menin inhibitor, has been approved by the FDA for treatment of relapsed or refractory acute leukemia in patients ≥1 year old with a lysine methyltransferase 2A gene (KMT2A) translocation. It is the first menin inhibitor to be approved in the US.

Rifaximin (Xifaxan - Salix), a non-absorbed oral antibiotic derived from rifampin (Rifadin, and others), has been approved by the FDA for treatment of travelers' diarrhea caused by noninvasive strains of Escherichia coli in patients 12 years of age or older. It has been available in Europe since 1987.