Final answer:
The recommended starting dose of metoprolol in heart failure is typically 12.5-25 mg once daily, but it should be determined by a healthcare provider.
Step-by-step explanation:
The recommended starting dose of metoprolol in heart failure depends on the individual patient and should be determined by their healthcare provider. However, a common starting dose for metoprolol in heart failure is 12.5-25 mg once daily. The dose can be gradually increased under medical supervision based on the patient's response.