How do ciprofol (HSK3486) and propofol differ in potency, dosing, and adverse effect profile?

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Last updated: November 1, 2026 • View editorial policy

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Ciprofol vs Propofol: Key Differences

Ciprofol is approximately 4-5 times more potent than propofol, requiring significantly lower doses (0.4-0.5 mg/kg vs 2.0 mg/kg for induction), and demonstrates superior safety with dramatically reduced injection pain (2.5-4.9% vs 38-52%), less hypotension (24% reduction), and less respiratory depression, though it has a slightly longer onset time (4-5 seconds) and recovery time (approximately 2 minutes longer). 1, 2, 3, 4

Potency and Dosing

Relative Potency

  • Potency ratio: 1:4 to 1:5 (ciprofol:propofol)
  • ED50 for ciprofol: 0.44 mg/kg vs propofol: 1.99 mg/kg 1
  • ED95 for ciprofol: 0.53-0.78 mg/kg vs propofol: 2.16-4.0 mg/kg 2, 3

Clinical Dosing

For induction:

  • Ciprofol: 0.4-0.5 mg/kg IV over 1 minute
  • Propofol: 2.0-2.5 mg/kg IV over 1 minute 5, 6

For maintenance:

  • Ciprofol: 0.4-2.4 mg/kg/h (typically 1.25 mg/kg/h)
  • Propofol: 4.0-12 mg/kg/h (typically 5 mg/kg/h) 5, 6

The 4-5 fold potency difference means you need substantially less ciprofol to achieve the same anesthetic depth, which translates directly to the improved safety profile.

Adverse Effect Profile

Injection Pain (Most Dramatic Difference)

  • Ciprofol: 2.5-4.9%
  • Propofol: 38-52% 3, 4
  • This represents an 87-90% reduction in injection pain with ciprofol—the most clinically apparent difference patients will notice

Cardiovascular Effects

  • Hypotension: Ciprofol reduces incidence by 24% (RR=0.76) 7
  • Ciprofol provides more stable hemodynamics throughout induction and maintenance 5, 6
  • Bradycardia: No significant difference between agents 7

Respiratory Depression

  • Ciprofol: 27.6%
  • Propofol: 55.2% 1
  • Represents a 33% reduction in respiratory depression with ciprofol
  • Hypoxemia rates are also lower with ciprofol 8

Other Adverse Events

  • Postoperative nausea/vomiting: No significant difference 7
  • Intraoperative body movements: 47% reduction with ciprofol (RR=0.53) 8

Pharmacodynamic Differences

Onset and Recovery

Time to loss of consciousness:

  • Ciprofol: 82-86 seconds
  • Propofol: 80 seconds
  • Difference: 4-5 seconds longer with ciprofol 2, 5

Recovery/awakening time:

  • Ciprofol: 7.6 minutes
  • Propofol: 5.5 minutes
  • Difference: approximately 2 minutes longer with ciprofol 5

This slightly delayed recovery is clinically insignificant for most procedures but should be factored into scheduling for high-volume ambulatory settings.

Depth of Anesthesia

  • Ciprofol achieves lower BIS values at equivalent sedation levels, indicating more reliable depth of anesthesia 6
  • Better suppression of eyelash reflex (MD=0.24) 8
  • More predictable sedation with fewer supplemental doses needed 5

Clinical Efficacy

Anesthesia success rates: 100% for both agents across multiple studies 5, 4, 7

  • Procedure completion rates are equivalent
  • No difference in overall sedation quality when dosed appropriately

Special Population Considerations

Older Patients

Ciprofol demonstrates particular advantages in elderly patients:

  • 76% reduction in hypotension risk (RR=0.76) 7
  • More stable hemodynamics during induction
  • Similar efficacy to propofol with improved safety margin

The hemodynamic stability is especially valuable in older patients with limited cardiovascular reserve, where propofol's rapid vasodilation can be problematic.

Pediatric Patients (Ages 3-6)

  • ED95 in children: 0.782 mg/kg for ciprofol 3
  • Injection pain: 2.5% vs 38.5% with propofol—particularly important in pediatric populations
  • Non-inferior efficacy with superior tolerability

Practical Clinical Algorithm

Choose Ciprofol when:

  • Patient has history of severe injection pain with propofol
  • Hemodynamic instability is a concern (elderly, cardiovascular disease)
  • Respiratory compromise risk is elevated (obesity, sleep apnea)
  • Slightly longer recovery time is acceptable

Choose Propofol when:

  • Fastest possible recovery is essential (very high-volume ambulatory settings)
  • Institutional familiarity/formulary restrictions
  • Cost is a primary consideration (ciprofol is newer, potentially more expensive)

Dosing conversion: Use approximately 1:4 to 1:5 ratio (ciprofol:propofol)

  • If using propofol 2 mg/kg, switch to ciprofol 0.4-0.5 mg/kg
  • If using propofol 10 mg/kg/h maintenance, switch to ciprofol 2-2.5 mg/kg/h

Important Caveats

  1. All current evidence is from Chinese studies 7—broader geographic validation is needed, though pharmacologic principles should translate

  2. Titration remains essential for both agents 9—the improved safety profile of ciprofol does not eliminate the need for careful dose titration and monitoring

  3. Respiratory monitoring is mandatory with both agents despite ciprofol's improved profile 9

  4. The 2-minute longer recovery with ciprofol is statistically significant but clinically minor for most procedures—don't let this deter use when safety advantages are relevant 5

  5. Both agents require the same level of monitoring and practitioner expertise—ciprofol's improved safety profile does not reduce the need for appropriate training and equipment 9

References

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Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.