diff --git a/server/src/domain/entities/IPrescription.ts b/server/src/domain/entities/IPrescription.ts
new file mode 100644
index 00000000..5b5ee55b
--- /dev/null
+++ b/server/src/domain/entities/IPrescription.ts
@@ -0,0 +1,25 @@
+export enum PrescriptionStatus {
+  PENDING = 'pending',
+  ISSUED = 'issued',
+  CANCELLED = 'cancelled',
+}
+
+export default interface IPrescription {
+  readonly _id?: string;
+  readonly appointmentId?: string;  
+  readonly doctorId?: string;       
+  readonly patientId?: string;     
+  readonly createdAt?: Date;
+  readonly updatedAt?: Date;
+  readonly medications?: IMedication[]; 
+  readonly status?: PrescriptionStatus;
+  readonly notes?: string;      
+}
+
+export interface IMedication {
+  readonly name: string;
+  readonly dosage: string;          // e.g., '2 tablets'
+  readonly frequency: string;       // e.g., 'twice a day'
+  readonly duration: string;        // e.g., '5 days'
+  readonly additionalInstructions?: string;
+}
diff --git a/server/src/domain/interface/repositories/IPrescriptionRepository.ts b/server/src/domain/interface/repositories/IPrescriptionRepository.ts
new file mode 100644
index 00000000..a021a850
--- /dev/null
+++ b/server/src/domain/interface/repositories/IPrescriptionRepository.ts
@@ -0,0 +1,6 @@
+import IPrescription from "../../entities/IPrescription";
+import IRepository from "./IRepository";
+
+export default interface IPrescriptionRepository extends IRepository<IPrescription> {
+  findByAppointmentId(appointmentId: string): Promise<IPrescription | null>;
+}
diff --git a/server/src/domain/interface/repositories/IRepository.ts b/server/src/domain/interface/repositories/IRepository.ts
new file mode 100644
index 00000000..84fb18e5
--- /dev/null
+++ b/server/src/domain/interface/repositories/IRepository.ts
@@ -0,0 +1,7 @@
+export default interface IRepository<T> {
+  findById(id: string): Promise<T | null>;
+  findAll(): Promise<T[]>;
+  create(entity: T): Promise<T>;
+  update(id: string, entity: T): Promise<T | null>;
+  delete(id: string): Promise<void>;
+}