Patient counseling by pharmacists involves providing patients with information about their medications and conditions to ensure safe and effective use. During counseling, the pharmacist assesses the patient's understanding, provides individualized advice, and aims to improve adherence, health outcomes, and quality of life. The counseling process involves preparing, opening the session, discussing the medication and treatment plan, and closing by checking the patient's understanding. Effective counseling requires good communication and establishing rapport between the pharmacist and patient.