All refractive corneal surgery reshapes the cornea to redirect light rays so that they focus on the retine....

The FDA has approved remimazolam (Byfavo – Acacia Pharma), an ultra-short-acting IV benzodiazepine, for induction and maintenance of sedation in adults undergoing procedures of up to 30 minutes' duration.

The US Preventive Services Task Force (USPSTF) has recently concluded that available evidence is insufficient to assess the balance between potential benefits and harms of using the prostate-specific antigen (PSA) to screen men < 75 years old for prostate cancer and has recommended against screening men > 75 years old.

The FDA has warned that use of the macrolide antibiotic clarithromycin (Biaxin, and generics) may increase the risk of cardiovascular morbidity and mortality in patients with heart disease.

The FDA has approved the oral GABA_A receptor modulator zuranolone (Zurzuvae – Sage Therapeutics/Biogen) for treatment of postpartum depression (PPD). Zuranolone is the second drug to be approved for this indication; brexanolone (Zulresso), another GABA_A receptor modulator, was approved for IV treatment of PPD in 2019.

Since the last Medical Letter article on surgical correction of refractive errors (Volume 41, page 122, 1999), some new techniques have been tried and new results have been reported.

Acupuncture is the practice of inserting fine needles for therapeutic purposes into points on the skin known as acupoints. In traditional Chinese medicine theory, these points arefound along channels that conduct "qi" (pronounced "chee"), or energy. In addition to insertion of needles, acupoints can be stimulated by heat, electrical current or just pressure.

The FDA has approved Phexxi (Evofem), a nonhormonal prescription-only vaginal gel containing lactic acid, citric acid, and potassium bitartrate, for prevention of pregnancy. The gel is intended for on-demand contraception; it is not effective when used after intercourse. It was previously approved for use as a vaginal lubricant (Amphora), but was never marketed.

Intrauterine devices (IUDs) and the etonogestrel implant are the most effective reversible contraceptive methods available. Hormonal oral contraceptives, patches, rings, and injectables are also effective in preventing pregnancy. When used alone, barrier and behavioral methods generally have higher failure rates than other methods (see Table 1). Selection of a contraceptive method is usually based on patient-specific factors and personal preference

The motor symptoms of Parkinson's disease (PD) are caused primarily by degeneration of dopaminergic neurons in the substantia nigra. The nonmotor symptoms of the disease are thought to be caused by degeneration of other neurotransmitter systems. No disease-modifying drugs are available for treatment of PD.