In clinical practice, the rate of IV drug administration significantly influences the onset of action, therapeutic response, and risk of adverse effects.
IV Bolus, IV Push, and IV Infusion are often used interchangeably, but they are not the same.
Let’s break it down clearly.
IV Bolus vs IV Push vs IV Infusion
| Parameter | IV Bolus | IV Push | IV Infusion |
|---|---|---|---|
| Definition | Very rapid administration of a medication directly into the bloodstream | Controlled injection of medication over a short duration | Gradual administration of medication diluted in IV fluids |
| Speed | Fastest (seconds) | Slower than bolus (typically 1–5 minutes) | Slowest (15 minutes to several hours) |
| Volume | Small to moderate | Small (often 1–20 mL) | Diluted in 50–500 mL or more |
| Control | Least controlled (rapid plasma spike) | More controlled than bolus | Most controlled |
| Onset | Immediate | Very Rapid | Gradual |
| Risk of ADRs | Higher (due to sudden peak levels) | Moderate | Lower (steady plasma concentration) |
| Common Use | Emergencies | Drugs requiring controlled rapid effect | Antibiotics, chemotherapy, maintenance therapy |
MBH/AB