The FDA has approved Aurlumyn (Eicos Sciences), an IV formulation of the prostacyclin analog iloprost, to reduce the risk of digit amputation in adults with severe frostbite. Iloprost is the first drug to be approved by the FDA for treatment of severe frostbite; it has been used off-label for this indication in the EU and elsewhere for decades. In the US, iloprost is also available as an inhaled formulation (Ventavis) for treatment of pulmonary arterial hypertension.

View the Comparison Table: Some Oral/Transdermal Opioid Analgesics

Patients who receive pretravel advice can reduce their risk for many travel-related conditions. Vaccines recommended for travelers are reviewed in a separate issue.

View the Table: Treatments Considered for COVID-19

Alzheimer's disease (AD) is the most common cause of dementia, but cognitive decline is also associated with other neurological conditions such as Parkinson's disease, dementia with Lewy bodies, vascular dementia, and frontotemporal dementia.

Microx (Pennwalt), a new low-dosage formulation of the thiazide-type diuretic metolazone (Zaroxolyn; Diulo), was recently marketed in the USA. The manufacturer claims that the low dose of controls hypertension with less potassium loss, making it safer than other diuretics and as effective as combination drugs, such as Dyazide, that include both a thiazide and a potassium-sparing diuretic. Medical Letter consultants generally do not recommend Dyazide or other fixed-dose combinations for treatment of hypertension.

Terconazole (Terazol - Ortho), an imidazole derivative, was recently marketed in the USA for treatment of vulvovaginal candidiasis. It is available both as a 0.4% vaginal cream (Terazol 7) and in 80-mg vaginal suppositories (Terazol 3).

Astemizole (Hismanal - Janssen), a new antihistamine, was recently marketed in the USA for treatment of seasonal allergic rhinitis and chronic idiopathic urticaria. Like terfenadine (Seldane - Medical Letter, 27:65, 1985), astemizole is claimed to be no more sedating than placebo, but the new drug offers the advantage of a once-daily dosage schedule.

Transdermal nitroglycerin products commercially available in the USA are listed in the table below. These patches, which look like adhesive bandages, are often applied over the precordium, but they can be attached to any hairless area of the skin, except distal parts of the extremities. Individual patients vary in their absorption of nitroglycerin from the skin; the amounts delivered (the doses) are average figures.

Octreotide acetate (Sandostatin - Sandoz), a synthetic octapeptide that mimics the actions of somatostatin, was recently approved by the US Food and Drug Administration for symptomatic treatment of patients with metastatic carcinoid or VIPomas (vasoactive intestinal peptide-secreting tumors).