A major resource for summer internships is:  www.ScienceJobs.com  which offers a broad range of positions in industry, academia and government.

Pharmacology majors  may also check individual company websites (a sampling of companies is listed below) for specific application instructions. 

The cover letter should include:
1. Career objectives following graduation
2. Research area of interest if any
3. How the internship will benefit academic and career objectives.

Companies usually give preference to students planning to seek positions in industry or entering PhD programs following graduation.

Amgen Inc.
1840 DeHavilland Drive
Thousand Oaks, CA 91320-1789

Elizabeth Arden Research Center
40 Merritt Blvd
Trumbell, CT 06611

Bayer Corporation
Pharmaceutical Division
400 Morgan Lane
West Haven, CT 06516

Boehringer- Ingelheim
Department of Pharmacology
900 Ridgebury Rd
P.O Box 368
Ridgefield, CT 06877

Bristol-Myers Squibb
Pharmaceutical Institute
PO Box 4000
Princeton, NJ 08543-4000

Neuroscience Drug Discovery
Bristol-Myers Squibb
5 Research Parkway
Wallingford, CT 06492

Collaborative Laboratories
3 Technology Drive
E. Setauket, NY 11733

Estee Lauder Companies
Research Park
125 Pinelawn Rd
Melville, NY 11747

Merck Research Laboratories
P.O Box 2000
Rahway, NJ 07065

Novartis Pharmaceuticals Corporation
406/151
59 Route 10
East Hanover, NJ 07936-1080

OSI Pharmaceuticals
106 Charles Lindbergh Blvd.
Uniondale, NY 11553

Oncogene Sciences
103 Charles Lindbergh Blvd
Uniondale, NY 11553

Pfizer Central Research
Eastern Point Rd
Groton, CT 06340

Purdue Research Center
99-101 Saw Mill River Rd
Yonkers, New York 10701

R.W. Johnson Pharmaceutical Research Institute
Route 202, P.O. Box 300
Raritan, NJ 08869

Roche Bioscience
3401 Hillview Ave.
Palo Alto, CA 94304

SmithKline Beecham Pharmaceuticals
709 Swedeland Rd UW2532
King of Prussia, PA 19406-093

Zeneca Pharmaceuticals
1800 Concord Pike
P.O. Box 15437
Wilmington, Delaware 19850-5437