The 2006 Medical Letter article on the then-new varicella-zoster vaccine concluded that Zostavax appears to be safe and effective in protecting patients ≥60 years old against herpes zoster and postherpetic neuralgia, especially in reducing the severity and duration of the disease.1 Some new information has recently become available.CLINICAL STUDIES — A Veterans Administration randomized, double-blind trial enrolled more than 38,000 patients ≥60 years old and followed them for a mean of 3.4 years after administration of Zostavax or placebo. Since the efficacy of the vaccine had been...

The FDA has approved siponimod (Mayzent – Novartis), a sphingosine 1-phosphate (S1P) receptor modulator, for oral treatment of adults with relapsing forms of multiple sclerosis (MS), including clinically isolated syndrome (initial neurological episode), relapsing-remitting disease, and active secondary progressive MS (SPMS). Siponimod is the second S1P receptor modulator to be approved in the US; fingolimod (Gilenya), which is approved for oral treatment of relapsing forms of MS in patients ≥10 years old, was the first. The purine antimetabolite cladribine (Mavenclad) was also...

The oral sphingosine 1-phosphate (S1P) receptor modulator etrasimod (Velsipity – Pfizer) has been approved by the FDA for treatment of moderately to severely active ulcerative colitis in adults. It is the second oral S1P receptor modulator to be approved in the US for this indication; ozanimod (Zeposia) was the first.

According to the Centers for Disease Control (CDC), as of April 24 there have been 844 confirmed cases of measles in the US in 2025; 11% of cases have resulted in hospitalization and 3 patients have died. The majority of cases (96%) have been in unvaccinated persons or in those whose vaccination history was unknown

The FDA has approved the marketing of fingolimod (Gilenya – Novartis) to reduce the frequency of clinical exacerbations and delay the accumulation of physical disability in patients with relapsing forms of multiple sclerosis (MS). Fingolimod is the first oral drug approved for this indication.

The FDA has approved ozanimod (Zeposia – Celgene), a sphingosine 1-phosphate (S1P) receptor modulator, for treatment of adults with relapsing forms of multiple sclerosis (MS), including clinically isolated syndrome (initial neurological episode), relapsing-remitting disease, and active secondary progressive MS (SPMS). It is the third oral S1P receptor modulator to be approved in the US for treatment of relapsing forms of MS; siponimod (Mayzent) is also indicated for use in adults, and fingolimod (Gilenya) is approved for use in patients ≥10 years old.

The FDA has approved ponesimod (Ponvory – Janssen), a sphingosine 1-phosphate (S1P) receptor modulator, for treatment of adults with relapsing forms of multiple sclerosis (MS), including clinically isolated syndrome (initial neurological episode), relapsing-remitting disease, and active secondary progressive MS (SPMS). Ponesimod is the fourth oral S1P receptor modulator to be approved in the US for once-daily treatment of relapsing forms of MS; ozanimod (Zeposia) and siponimod (Mayzent) are also approved for use in adults, and fingolimod (Gilenya) is indicated for use in patients...

The oral sphingosine 1-phosphate (S1P) receptor modulator ozanimod (Zeposia – Bristol Myers Squibb) has been approved by the FDA for treatment of adults with moderately to severely active ulcerative colitis. It is the first S1P receptor modulator to be approved for treatment of ulcerative colitis. Ozanimod was approved in March 2020 for use in adults with relapsing forms of multiple sclerosis.

The FDA has approved cladribine (Mavenclad – EMD Serono), a purine antimetabolite, for oral treatment of adults with relapsing forms of multiple sclerosis (MS), including relapsing-remitting disease and active secondary progressive MS (SPMS), who cannot tolerate or have had an inadequate response to other drugs indicated for treatment of MS. It is not recommended for use in patients with clinically isolated syndrome (CIS). IV cladribine, which is FDA-approved for treatment of hairy cell leukemia, has been used off-label for treatment of MS.