Balsalazide disodium (Colazal), a prodrug of mesalamine, was marketed in the US this year for oral treatment of mildly to moderately active ulcerative colitis. Oral formulations of mesalamine have been available in the US for nine years for treatment and maintenance of remissions and olsalazine, which is a dimer of mesalamine, is marketed for maintenance of remissions but not for treatment. Balsalazide has been available in Europe for four years.

The FDA has approved two new oral kinase inhibitors for treatment of unresectable or metastatic melanoma: dabrafenib (Tafinlar – GSK) for melanomas with BRAF V600E mutations and trametinib (Mekinist – GSK) for melanomas with either BRAF V600E or V600K mutations. Dabrafenib is not recommended for patients with wild-type BRAF (BRAF-negative) melanoma, and trametinib is not recommended for patients who have received prior BRAF-inhibitor therapy.

The FDA has approved avelumab (Bavencio – EMD Serono) and durvalumab (Imfinzi – AstraZeneca), two new immune check point inhibitors, and pembrolizumab (Keytruda – Merck), a checkpoint inhibitor that has been available in the US since 2014, for treatment of locally advanced or metastatic bladder cancer. Nivolumab (Opdivo) and atezolizumab (Tecentriq) were approved earlier for this indication.

This issue includes reviews of drugs for glaucoma, age-related macular degeneration (AMD), bacterial conjunctivitis, and dry eye disease. Allergic conjunctivitis is reviewed in a separate issue.

With the possibility that chemical weapons may be used against United States armed forces in the Persian Gulf, the military has taken steps to protect our troops against poison gas, particularly ''nerve agents';'; (MA Dunn and FR Sidell, JAMA, 262:649, 1989).

Zanamivir, a neuraminidase inhibitor taken by inhalation, has been approved by the FDA for treatment of influenza. Oseltamivir phosphate, an oral neuraminidase inhibitor, will probably be approved soon.

The FDA has approved a nebulized suspension of the corticosteroid budesonide for maintenance treatment of persistent asthma in children one to eight years old.

Yttrium-90 ibritumomab tiuxetan (Zevalin -IDEC) was approved by the FDA for treatment of patients with relapsed or refractory low-grade follicular or transformed B-cell non-Hodgkin's lymphoma (NHL), including patients with follicular lymphoma refractory to rituximab (Rituxan -Medical Letter 1998; 40:65). Zevalin is the first radioimmunoconjugate to be approved for treatment of cancer.

Resveratrol is a phytochemical found in the skin of red grapes and in many other plants, including berries, plums and peanuts. As a constituent of red wine, it has been associated with cardioprotective effects. Dietary supplements containing resveratrol are now being widely promoted as antioxidants that can prevent agerelated diseases.