Aminoglycosides are excreted by glomerular filtration and have a serum half-life of 2 to 3 h; the half-life increases exponentially as the GFR falls (eg, in renal insufficiency, in the elderly).
Madagascar is the world's major natural vanilla producer, accounting for about 75% of production. Cloves are the third main export crop, grown mostly by smallholders. Production follows a 4-year cycle with 2â3 years of high output followed by one year of low production.
Jamaica exported $227.7 million and imported $402.7 million in agricultural products during 2001. The island's food needs are met only in part by domestic production, and foodstuffs are a major import item. The main food crops, grown primarily by small cultivators, are sweet potatoes and yams, rice, potatoes, manioc, tomatoes, and beans. Jamaica is a major producer of marijuana, which, however, remains illegal.