In 2003, the FDA approved generic gabapentin, and it's now made by several drug companies. An extended-release form of gabapentin is available under the brand name Horizant. In 2004, the drug maker Pfizer settled charges for marketing Neurontin for unapproved uses, and agreed to pay $430 million.
Although most diatoms are autotrophic, some heterotrophic or symbiotic species can be found in particular habitats. The living matter of each diatom is enclosed in a shell of silica that it secretes. These shells are marked by minute pores or depressions that allow the living organism access to its environment.iatom (dÄªËÉtÅmË, âtÅmË) [ key ], unicellular organism of the kingdom Protista, characterized by a silica shell of often intricate and beautiful sculpturing. Most diatoms exist singly, although some join to form colonies.
An autotroph is an organism that produces its own food. It is  usually a unicellular organism. Autotrophs utilize photosynthesis  to produce their food (typically the nutrie â¦ nt glucose). An  autotroph is also referred to as a producer.An example of an  autotroph is algae.A heterotroph is an organism that receives its  food from other sources. It is a multicellular or unicellular  organism.Organisms that are consumers or decomposers are  heterotrophs. A parasite is also a heterotroph. A parasite feeds  off other organisms for its food. An example of a parasite is a  deet tick. heterotroph is an organism that receives its  food from other sources. It is a multicellular or unicellular  organism. Organisms that are consumers or decomposers are  heterotrophs. A parasite is also a heterotroph. A parasite feeds  off other organisms for its food. An example of a parasite is a  deet tick.