1
COVID-19 Update: 2025-2026 Vaccine Formulations and Recommendations
The Medical Letter on Drugs and Therapeutics • October 13, 2025; (Issue 1739)
The FDA has licensed new 2025-2026 formulations
of the mRNA COVID-19 vaccines manufactured by
Pfizer/BioNTech (Comirnaty) and Moderna (Spikevax,
mNEXSPIKE) and the adjuvanted protein subunit
COVID-19 vaccine manufactured by Novavax
(Nuvaxovid). The new formulations are indicated
for use in all adults ≥65 years old and in persons
6 months (Spikevax), 5 years (Comirnaty), or 12
years (mNEXSPIKE, Nuvaxovid) through 64 years old
who are at high risk for severe COVID-19 because
of an underlying condition. An Emergency Use
Authorization allowing administration of the Pfizer
vaccine to children 6 months through 4 years old has
been withdrawn.
2
Antiviral Drugs for Seasonal Influenza for 2025-2026
The Medical Letter on Drugs and Therapeutics • October 27, 2025; (Issue 1740)
Influenza is generally a self-limited illness, but complications
including pneumonia, respiratory failure, and
death can occur, especially in persons at increased
risk (see Table 1).
3
Treatment of Allergic Rhinitis and Allergic Conjunctivitis
The Medical Letter on Drugs and Therapeutics • March 31, 2025; (Issue 1725)
Initial treatment of allergic rhinitis (AR) depends
on the severity of symptoms and whether they are
intermittent or persistent (see Table 1).
4
Comparison Chart: Topical Nonsteroidal Drugs for Atopic Dermatitis (online only)
The Medical Letter on Drugs and Therapeutics • March 2, 2026; (Issue 1749)
View the Comparison Chart: Topical Nonsteroidal Drugs for Atopic Dermatitis
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Comparison Chart: Interleukin (IL) Antagonists and Oral JAK Inhibitors for Moderate to Severe Atopic Dermatitis (online only)
The Medical Letter on Drugs and Therapeutics • March 2, 2026; (Issue 1749)
View the Comparison Chart: Interleukin (IL) Antagonists and Oral JAK Inhibitors for Moderate to Severe Atopic Dermatitis
6
In Brief: Extended Duration of Use for Nexplanon
The Medical Letter on Drugs and Therapeutics • March 2, 2026; (Issue 1749)
Nexplanon, a single-rod contraceptive implant
containing the progestin etonogestrel, has now been
approved for prevention of pregnancy for up to 5 years.
It was previously approved for up to 3 years of use.
7
Addendum: Urinary Incontinence with Second-Generation Antipsychotic Drugs
The Medical Letter on Drugs and Therapeutics • March 2, 2026; (Issue 1749)
Our recent article entitled Lumateperone (Caplyta) for Adjunctive
Treatment of Depression should have included
urinary incontinence among the adverse effects associated
with use of second-generation antipsychotic drugs. Urinary
incontinence has been reported with both first- and second-generation antipsychotics. Possible causes include the
anti-alpha-adrenergic, antidopaminergic, and anticholinergic
effects of these drugs, as well as sedation. In an observational
study in 200 women 20-40 years old, urinary incontinence
was reported by 29% of those taking antipsychotic drugs and
by 13% of age-matched controls.
8
In Brief: A Second Subcutaneous Furosemide Infusor (Lasix ONYU) for Heart Failure
The Medical Letter on Drugs and Therapeutics • March 16, 2026; (Issue 1750)
The FDA has approved Lasix ONYU (SQ Innovation),
a subcutaneous formulation of the loop diuretic
furosemide administered via a wearable pump (onbody
infusor), for treatment of edema in adults with
chronic heart failure (HF). A similar product, Furoscix,
is approved for treatment of edema in chronic HF
or chronic kidney disease. Furosemide has been
available for years in oral and IV formulations for
such use.
9
Correction
The Medical Letter on Drugs and Therapeutics • March 16, 2026; (Issue 1750)
In our article titled A Renal Indication for Semaglutide (Ozempic)
(Med Lett Drugs Ther 2025; 67:38), the MACE endpoint defined
in Table 2, footnote 3 was incorrectly stated as a composite of
cardiovascular death, nonfatal myocardial infarction, nonfatal
stroke, or all-cause mortality. All-cause mortality should not
have been included in the composite endpoint.
10
Two New Drugs for Gonorrhea
The Medical Letter on Drugs and Therapeutics • March 16, 2026; (Issue 1750)
The FDA has approved two antibiotics, gepotidacin
(Blujepa — GSK) and zoliflodacin (Nuzolvence —
Entasis), for oral treatment of uncomplicated
urogenital gonorrhea in patients ≥12 years old.
Gepotidacin is approved for use in persons weighing
≥45 kg who have limited or no alternative treatment
options; it was approved in 2025 for treatment of
uncomplicated urinary tract infection in females.
Zoliflodacin is approved for use in persons weighing
≥35 kg. Neither drug is indicated for treatment of
rectal or pharyngeal gonorrhea.
