Hi Dean,
Pharmaceutical promotion also plays a significant role in ensuring rational and safe use of medicines by providing doctors with high quality of information. The information provided by pharmaceutical companies is used by doctors as one of their sources of information, especially for newly-marketed drugs. However, studies have shown the low quality of information in pharmaceutical promotion.Greater reliance of this information will exposed doctors to the negative impact of promotion on their prescribing behaviour.
My comment is that this English is very good. I have high-lighted a few areas that you still need to correct.
Best wishes, Clive