Intensive chemotherapy, with or without total body radiation, followed by bone marrow transplantation is now widely used in the treatment of malignant diseases. The drugs and radiation needed to try to eradicate the malignancy unavoidably destroy the bone marrow; intravenous infusion of bone marrow cells restores the marrow by repopulating it. Diseases for which bone marrow transplantation has been used include the leukemias and lymphomas, breast cancer, neuroblastoma, ovarian cancer, germ cell tumors, melanoma, multiple myeloma, and malignant gliomas (NC Gorin, Am J Clin On-col, 14...

Finasteride (Proscar - Merck) has now been approved by the US Food and Drug Administration (FDA) for oral treatment of benign prostatic hyperplasia. A 4-aza-steroid, the drug is a specific inhibitor of steroid 5 -reductase, the enzyme that catalyzes conversion of testosterone to dihydrotestosterone. Dihydrotestosterone is required for development and maintenance of prostatic hypertrophy (JS Tenover, Endocrinol Metab Clin North Am, 20:893, 1991).

Sotalol (hydrochloride (Betapace -Berlex; Sotacor -Bristol Laboratories of Canada), an antiarrhythmic drug that prolongs repolarization (Class III) and also has beta-adrenergic-blocking activity (Class II), was recently approved by the US Food and Drug Administration (FDA) for oral treatment of life-threatening ventricular arrhythmias.

Zolpidem (Ambien - Searle), an imidazopyridine hypnotic available in Europe for several years, was recently approved by the US Food and Drug Administration for short-term treatment of insomnia.

Loratadine (Claritin - Schering), a new H 1 -receptor antagonist, has been approved by the U.S. Food and Drug Administration for treatment of seasonal allergic rhinitis in patients more than 12 years old. It will compete with older, relatively sedating drugs such as chlorpheniramine (Chlor-Trimeton, and others) and clemastine (Tavist - Medical Letter, 35:9, 1993) and with newer relatively non-sedating agents such as terfenadine (Seldane) and astemizole (Hismanal).

Tacrine hydrochloride (Cognex - Parke-Davis), an acridinamine derivative, will soon be available for treatment of cognitive deficits associated with Alzheimer's disease.

Minoxidil 2% topical solution (Rogaine - Upjohn) has been available in the USA since 1988 for treatment of androgenetic alopecia (Medical Letter, 29:87, 1987). Although available only by prescription, it is advertised on television to the general public.

Isosorbide mononitrate, the major active metabolite of isosorbide dinitrate, was first approved in the USA for oral use in patients with chronic stable angina in 1992 (Medical Letter, 34:61, 1992). Now an extended-release formulation of isosorbide mononitrate (Imdur -Key) has been approved by the US Food and Drug Administration.

An intrathecal formulation of the muscle relaxant baclofen (Lioresal Intrathecal - Medtronic) has been approved by the US Food and Drug Administration for treatment of spasticity due to multiple sclerosis (MS) or spinal cord injury. Its use requires subcutaneous implantation of a drug pump, which infuses the drug into the subarachnoid space. Baclofen (Lioresal [Ciba-Geigy], and others) has been available as an oral formulation for many years (Medical Letter 20:43, 1978), but its use has been limited by central-nervous-system effects such as drowsiness and confusion.

Fluvastatin (Lescol - Sandoz), an HMG-CoA reductase inhibitor, was recently marketed in the USA for treatment of hypercholesterolemia. A synthetic mevalonolactone derivative, it is chemically distinct from previously available drugs in this class.