| Business | Phone |
| Wockhardt Americas Rockville 20850 | (301) 869-4645 |
| Allied Pharmaceutical Svc 2387 Lewis Ave, Rockville 20851 | (301) 468-8872 |
| United States Pharmacopeia 5645 Fishers Ln, Rockville 20852 | (301) 881-0666 |
| Otsuka America Pharmaceutical 2440 Research Blvd # 500, Rockville 20850 | (301) 990-0030 |