Morphine PCA Dosing Calculator

Calculates patient-controlled analgesia (PCA) settings for IV morphine. Basal rate: 0.5–3 mg/h (use caution in opioid-naive patients). Bolus: 0.5–2.5 mg with lockout interval 6–10 minutes. Set 4-hour limit per institutional protocol. Requires nursing assessment at minimum every 4 hours. Titrate based on pain scores, respiratory rate, and sedation level.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
Advertisement

How It Works

Calculates patient-controlled analgesia (PCA) settings for IV morphine. Basal rate: 0.5–3 mg/h (use caution in opioid-naive patients). Bolus: 0.5–2.5 mg with lockout interval 6–10 minutes. Set 4-hour limit per institutional protocol. Requires nursing assessment at minimum every 4 hours. Titrate based on pain scores, respiratory rate, and sedation level

Each component has a specific meaning:

  • Respiratory rate — The respiratory rate recorded for the scenario being assessed.
  • Sedation level — The sedation level recorded for the scenario being assessed.

Note: Interpret the morphine pca result against the thresholds and context described above.

How to Use

Enter the respiratory rate, sedation level for the scenario you are assessing. Calculates patient-controlled analgesia (PCA) settings for IV morphine. Basal rate: 0.5–3 mg/h (use caution in opioid-naive patients). Bolus: 0.5–2.5 mg with lockout interval 6–10 minutes. Set 4-hour limit per institutional protocol. Requires nursing assessment at minimum every 4 hours. Titrate based on pain scores, respiratory rate, and sedation level. Use the morphine pca result to inform your calculation.

Related Calculators

Fentanyl ICU Infusion

Medical

Opioid Conversion

Medical

RASS Score

Medical

Frequently Asked Questions