There are several types of PhD programs in pharmacy available in the United States. These include:
 

1. PhD in Pharmacy: This type of program is designed to prepare students for careers in academia, research, or other advanced roles in the pharmaceutical industry. Students in these programs typically complete coursework, a research project, and a dissertation.

2. PhD in Pharmaceutical Sciences: These programs focus on the scientific principles underlying the development and use of drugs. Students may study topics such as pharmacology, toxicology, medicinal chemistry, and drug delivery.

3. PhD in Clinical Pharmacy: These programs prepare students for careers in advanced patient care roles, such as clinical pharmacy specialists or pharmacy informatics. Students may study topics such as pharmacotherapy, drug interactions, and disease management.

4. PhD in Pharmacy Administration: These programs focus on the business and management aspects of pharmacy practice. Students may study topics such as healthcare policy, pharmacovigilance, and pharmacy leadership.
    

Here is a list of 20 pharmacy PhD programs in the United States:

1. University of California, San Francisco
2. University of North Carolina at Chapel Hill
3. University of Michigan
4. University of Wisconsin-Madison
5. University of Florida
6. University of Maryland
7. University of Minnesota
8. University of Utah
9. University of Pittsburgh
10. University of Colorado Anschutz Medical Campus
11. University of Illinois at Chicago
12. Purdue University
13. University of Kentucky
14. University of Tennessee Health Science Center
15. University of Kansas
16. University of Nebraska Medical Center
17. University of Oklahoma Health Sciences Center
18. University of South Carolina
19. Virginia Commonwealth University
20. University of Washington

This is just a sampling of the many pharmacy PhD programs available in the United States. It is important to carefully research and compare programs to find the one that is the best fit for you.