Oral isotretinoin is the best treatment for patients with moderate acne in whom antibiotics are unsuccessful and for those with severe inflammatory acne. Dosage of isotretinoin is usually 1 mg/kg once/day for 16 to 20 wk, but the dosage may be increased to 2 mg/kg once/day.
Lots of different predators will prey upon other predators: Golden eagles are well known predators of smaller hawks. Collared lizards will eat other lizards. Crocodilians will feed on other predators, such as monitor lizards, snakes and even lions that come to the water to drink. Many snakes will eat other snakes. Some frogs, like the horned frogs of South America and the African bullfrog, readily feed on other frogs.
Predators that eat only other arthropods are called carnivores; arthropods that eat only plants are referred to as herbivores and are frequently the prey of predators. Predators that feed on both prey and plants (pollen and nectar) are called omnivores.ome predators are specialists, feeding on only one or a few species of prey, but most are generalists and feed on a wide variety of insect pests and even, at times, each other.