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.
autotroph is when an organism can make it's own food. heterotroph is when an organism is not capable of making it's on food. for example: plants are autotrophs. Photosynth â¦ esis is the way they make their food.An animal like us, humans is a heterotroph.ost autotrophic bacteria can synthesize their food from substances like hydrogen sulphide. This process is called chemosynthesis and involves the use of chemical substances for the production of energy. Heterotrophic bacteria, in contrast, cannot synthesize their own energy and must consume organic matter for energy.