Step 1: Understanding the Concept:
Schedule X contains drugs that have a high potential for addiction and abuse (e.g., Amphetamines, Phenobarbitone). Therefore, the Drugs and Cosmetics Rules impose the strictest retail controls on them.
Step 2: Detailed Explanation:
1. Prescription: These drugs can only be sold on the prescription of a Registered Medical Practitioner (RMP). The prescription must be in duplicate.
2. Record Keeping: The pharmacist must retain one copy of the prescription for at least two years. Additionally, they must maintain a special register recording the name and address of the patient, the drug name, the batch number, and the prescribing doctor's details.
3. Storage: These drugs must also be kept under lock and key.
Step 3: Final Answer:
The sale of Schedule X drugs is strictly regulated through a duplicate prescription system and mandatory record-keeping in a dedicated special register.