Alcaftadine (Lastacaft – Allergan), an ophthalmic H₁-antihistamine, has been approved by the FDA for prevention of itching associated with allergic conjunctivitis in patients > 2 years old.

The FDA has approved a once-weekly extendedrelease formulation of exenatide (Bydureon – Amylin), an injectable glucagon-like peptide-1 (GLP-1) receptor agonist, for treatment of type 2 diabetes.

The choice of drugs for treatment of allergic rhinitis depends on the severity of symptoms and whether they are intermittent or persistent (see Table 1).

The FDA has approved rolapitant (Varubi – Tesaro), an oral substance P/neurokinin 1 (NK₁) receptor antagonist, for use with other antiemetics to prevent delayed nausea and vomiting associated with cancer chemotherapy in adults. It is the third substance P/NK₁ receptor antagonist to be approved in the US; aprepitant (Emend) and netupitant (only available in combination with the 5-HT₃ receptor antagonist palonosetron as Akynzeo) were approved earlier for prevention of both acute and delayed chemotherapy-induced nausea and vomiting.

The FDA has approved a 5% ophthalmic solution of lifitegrast (Xiidra – Shire), a lymphocyte function-associated antigen-1 (LFA-1) antagonist, for treatment of the signs and symptoms of dry eye disease. Lifitegrast is the first LFA-1 antagonist to be approved for any indication in the US.

Metformin (Glucophage, and others) is generally preferred as the first-line agent for treatment of type 2 diabetes, but most patients subsequently require treatment with more than one drug. Many combination products have been marketed; the latest of these combines saxagliptin with extended-release (ER) metformin as Kombiglyze XR.

The FDA has approved the nucleotide polymerase inhibitor sofosbuvir (Sovaldi – Gilead) for use in combination with other antiviral drugs for treatment of chronic hepatitis C virus (HCV) infection.

The FDA has issued an Emergency Use Authorization (EUA) for Lilly's investigational monoclonal antibodies bamlanivimab (LY-CoV555) and etesevimab (LY-CoV016) to be administered together for treatment of mild to moderate COVID-19 in patients ≥12 years old who weigh ≥40 kg and are at high risk of progressing to severe disease and/or hospitalization (see Table 1). Bamlanivimab received an EUA for use as monotherapy in such patients in November 2020. Regeneron's investigational monoclonal antibodies casirivimab (REGN10933) and imdevimab (REGN10987) are also authorized for use...

A combination tablet containing estradiol and drospirenone (Angeliq - Berlex) recently became available for treatment of moderate to severe menopausal symptoms in women with an intact uterus. Since the last Medical Letter issue reviewing such devices,1 more continuous glucose monitoring (CGM) systems have become available. Five devices available now, and two expected to be marketed soon, are listed in the table on page 14. The FDA has approved continuous glucose devices only for the observation of glucose trends.

The FDA has approved a two-dose hepatitis B virus (HBV) vaccine (Heplisav-B – Dynavax) for use in adults ≥18 years old. The three other HBV vaccines marketed in the US are usually administered in 3 doses. Engerix-B and Recombivax HB are licensed for use in persons of all ages. A combination hepatitis A/B vaccine (Twinrix) contains the same hepatitis B component as Engerix-B and is licensed for use only in adults.