The rational use of drugs requires that the drug is prescribed for a particular patient after proper diagnosis of a health problem. Prescriptions should promote the rational use of drugs. Rational use of drugs requires that a particular patient with a specific health problem receives drugs according to the following:

• Appropriate dose,
• Appropriate dosage form,
• Appropriate route of administration,
• Appropriate frequency of administration,
• Appropriate duration of treatment,
• Appropriate information to the patient,
• Adequate follow up