Final answer:
Formal marketing and sales for drugs must comply with FDA regulations, which include not promoting drugs for off-label uses and maintaining a fair balance in advertising.
Step-by-step explanation:
Drug Advertising Regulations
When doing formal marketing and sales for drugs, one element that is not required is promotion for off-label use. The FDA regulations stipulate that a company can promote a drug only for the approved indications. Additionally, advertisements must maintain a fair balance between information about the drug's benefits and its potential risks or side effects. Off-label promotion is not permitted as part of formal marketing efforts and can lead to regulatory action.