The Pharmaceutical Companies DrugIntel.com's companies list is a good starting point if you need to find a pharma company  

PhRMA (Pharmaceutical Research and Manufacturers of America) is a trade association website. The PhRMA represents the leading US research-based pharmaceutical and biotechnology companies and contains much useful information. The industry invested an estimated $33.2 billion in 2003 in discovering and developing new medicines

ABPI (Association of the British Pharmaceutical Industry) is the trade association for about a hundred pharma companies in the UK which between them develop, manufacture and supply more than 90 per cent of the medicines prescribed in the National Health Service

BIO is the US Biotechnology Industry Association. The website contains news, events and topic discussions

BIA The Bio Industry Association is the voice of the biotechnology industry in the UK

EMEA The European Medicines Agency is the principal regulatory body for prescription medicines in Europe. It is headquartered in London, UK

FDA The US Food and Drugs Administration is the regulatory authority for prescription medicines in the United States of America. It is headquartered in Rockville, Maryland

BioSpace has the latest biotech news and discussion

Pharmiweb.com is a website containing masses of information for those involved in the pharmaceutical industry, including the latest industry news

Pharmweb PharmWeb is an online community of pharmaceutical and healthcare-related professionals, with approximately 25,000 self-registered users. This site may also be of interest to patients

InPharm.com If your work interfaces in any way with the pharmaceutical industry, this site is for you!

Medscape is a useful medical information site, covering all specialities

Doctor's Guide has the latest medical news

Medi-Lexicon is an online dictionary of medical and pharmaceutical terms. The site also has medical news and a search facility professionals