Acne is common among adolescents and adults. Guidelines for treatment of acne were last published by the American Academy of Dermatology in 2016.

The FDA has approved cantharidin 0.7% solution (Ycanth – Verrica) for topical treatment of molluscum contagiosum in patients ≥2 years old. Ycanth was the first drug to be approved in the US for this indication. A 10.3% gel formulation of berdazimer (Zelsuvmi), a nitric oxide-releasing agent, has also been approved by the FDA for treatment of molluscum contagiosum (in patients ≥1 year old); it will be reviewed in a future issue.

Every pharmaceutical drug is a dose-dependent poison. This article describes the clinical presentation and treatment of some dangerous overdoses commonly reported in adults.

Berdazimer 10.3% gel (Zelsuvmi – Ligand), a first-in-class nitric oxide-releasing agent, has been approved by the FDA for topical treatment of molluscum contagiosum in patients ≥1 year old. It is the second drug to become available in the US for treatment of molluscum contagiosum and the first that can be applied by the patient or caregiver at home; cantharidin 0.7% solution (Ycanth), which is applied by a healthcare professional, was approved earlier for use in patients ≥2 years old.

Tirbanibulin, a microtubule inhibitor, has been approved by the FDA as a 1% ointment (Klisyri – Almirall) for topical treatment of actinic keratosis of the face or scalp.

The FDA has approved ThermaClear (Therative), a battery-powered, handheld device, to treat individual acne lesions with heat. ThermaClear is indicated only for use on mild to moderate inflammatory acne, not severe nodular or severe cystic acne, and it is not meant to be used on blackheads and whiteheads. Two similar devices are already on the market: Zeno, another handheld device that delivers heat to acne lesions, and the Radiancy Clear Touch Lite Acne Clearance System, a larger heat-delivery device.

Photoplex (Herbert), a new sunscreen formulation containing 7% padimate O and 3% Parsol 1789, is being advertised as the first and only chemical sunscreen with proven absorption throughout the UVB and UVA spectrum.

In 1989, Photoplex (Allergan Herbert), a combination of the dibenzoyl methane avobenzone (Parsol 1789) and the aminobenzoic acid (PABA) ester padimate O, was the first 'broad spectrum' sunscreen to become available in the USA (Medical Letter, 31:59, 1989). Now, Shade UVAGuard (Schering-Plough), a similar product, has been approved by the US Food and Drug Administration; it also contains avobenzone, plus the benzophenone oxybenzone and octyl methoxycinnamate.

(Kodak) perform clinical chemistry tests using desk-top instruments, microliter samples and postage-stamp-sized analytical slides containing dry reagents layered on clear polyester and mounted in plastic. The system requires no wet reagents, except for electrolyte determinations, and is designed to require a minimum amount of training to operate. A single analysis takes about five minutes.

The oral polymerase acidic endonuclease inhibitor baloxavir marboxil (Xofluza — Genentech) is now FDAapproved for post-exposure prophylaxis of influenza in patients ≥12 years old. Baloxavir was approved for treatment of acute uncomplicated influenza in patients ≥12 years old in 2018.1 Two neuraminidase inhibitors are FDA-approved for prophylaxis of influenza: oseltamivir (Tamiflu, and generics) in patients ≥1 year old, and zanamivir (Relenza) in patients ≥5 years old.2 Unlike oseltamivir and zanamivir, baloxavir is not FDA-approved for pre-exposure prophylaxis of...