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.
Weasels eat small animals, and raccoons eat animals, fishes, frogs, and fruit. Owls eat mice and chipmunks. Large secondary consumers, such as wolves, bears, and cougars, are the only ones who can bring down deer or elk. The larger carnivores may also eat smaller ones sometimes. There are other animals in this food web, such as foxes, beavers, black birds, and porcupines. Because the plants do so well, animals flourish too. Threats to the Temperate Rainforest Most of the threats toward the temperate rainforest come from humans harvesting trees to use as resources for such things as paper.