Would somebody please help me with my English?

Prescription drugs are prescibed to improved patients’ health. Together with the health benefits, the use of drugs is associated with risk and harm to many people even at therapeutic doses. In Australia, in 1995, more than 20% of hospital adverse events are drug related and 50% of drug related events were judged highly preventable.

Pharmaceutical promotion provides information about drugs to physicians. In Australia, spending on drug promotion has reached between $ 1.3 billion to $ 2.0 billion per year. The information in drug promotion is used by companies to create awareness about their products to the prescribers. In 2004, withdrawal of an arthritis drug refocoxib from the market due to safety reason has highlighted the need for heath professionals to access to complete and accurate information from the pharmaceutical companies. Promotion with inaccurate information was continued for  four of five years on the market despite evidence from a large-scale randomised control study have shown  increased in cardiac risks . Graham et al. reported that about 88,000 to 139,000 extra heart attacks and sudden cardiac death in the US were attributed to refocoxib in five years in the market. Besides this , the information provided by companies should be reliable because it may have an impact on physicians prescribing behaviour.

Regards,

Dean