Bolus
Bolus — A single, concentrated dose of a compound administered at one time, as opposed to a continuous infusion or divided dosing in research protocols.
What Is a Bolus?
A bolus is a single, rapid dose of a peptide administered all at once (as opposed to a continuous infusion or controlled release). Bolus injection delivers the entire dose within seconds, producing the highest Cmax and fastest onset. IV bolus, SC bolus, and IM bolus are common peptide administration methods.
PK Implications
- IV bolus: Cmax at time zero. Fastest onset, highest peak. Used for PK studies to determine Vd and clearance
- SC bolus: Cmax at 15-60 min. Lower peak than IV. Most common peptide research route
- vs. Infusion: Bolus gives sharp peak-trough cycle; infusion provides steady-state concentration
Frequently Asked Questions
What is Bolus?
A single, concentrated dose of a compound administered at one time, as opposed to a continuous infusion or divided dosing in research protocols.
Why is Bolus important in peptide research?
Bolus is a fundamental concept in research as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.