Many long-term travelers find contact lenses are too difficult to keep clean, so switch to glasses. Bring a copy of your lens prescription. Contraceptives, especially spermicidal jellies and creams, may be difficult to find. Bring an adequate supply of whichever birth control method you use, or if you are going for a long time, arrange to have additional supplies sent to you. Sanitary napkins are more widely available.
Sunscreen products can be expensive overseas.
Calamine lotion for insect bites. Baby powder or medicated powder for heat rashes and to prevent fungal infections. Thorough cleansing with soap and clean water is the best treatment for cuts and scrapes. Sterile gauze pads to control bleeding and to protect burns and large wounds. Adhesive tape to hold dressings, close small cuts, help make splints, etc.