Pyrogens Elevate the Hypothalamic Set-Point
Placeholder: pyrogens push the brain thermostat above normal.
- Exo/endogenous: Pyrogen type (Placeholder short caption)
- PGE2: Mediator (Placeholder short caption)
- Preoptic area: Site (Placeholder short caption)
- 1–3°C: Typical shift (Placeholder short caption)
Set-point signaling
Placeholder: pyrogens raise the thermoregulatory target temperature.
Body Temperature Climbs Toward the New Set-Point
Placeholder: temperature rises to match the elevated thermostat.
- Chill/rise: Phase (Placeholder short caption)
- Shivering: Response (Placeholder short caption)
- 2–6 h: Time to peak (Placeholder short caption)
- 38–40°C: Peak range (Placeholder short caption)
Thermogenic response
Placeholder: shivering and vasoconstriction drive temperature upward.
Weight-Based Acetaminophen Dosing Selection
Placeholder: acetaminophen inhibits COX centrally to lower the set-point.
- Central COX: Mechanism (Placeholder short caption)
- 10–15 mg/kg: Dose range (Placeholder short caption)
- ~30–60 min: Onset (Placeholder short caption)
- 4 doses/day: Max daily (Placeholder short caption)
Central antipyretic action
Placeholder: acetaminophen acts mainly within the CNS on prostaglandin synthesis.
Weight-Based Ibuprofen Dosing Selection
Placeholder: ibuprofen inhibits COX both peripherally and centrally.
- Peripheral+central COX: Mechanism (Placeholder short caption)
- 5–10 mg/kg: Dose range (Placeholder short caption)
- ~30–45 min: Onset (Placeholder short caption)
- 3–4 doses/day: Max daily (Placeholder short caption)
Dual-site antipyretic action
Placeholder: ibuprofen reduces prostaglandins at inflamed tissue and hypothalamus.
Temperature Falls as the Set-Point Resets
Placeholder: lowered set-point triggers sweating and heat loss.
- Sweating/vasodilation: Response (Placeholder short caption)
- 0.5–2°C: Reduction (Placeholder short caption)
- 4–8 h: Duration (Placeholder short caption)
- Per interval: Re-dose (Placeholder short caption)
Resolution and re-dosing
Placeholder: temperature falls until effect wanes and next dose is due.
Choosing between agents
Placeholder: dosing interval and mg/kg strength both shape total reduction.
Placeholder highlight: dose and drug choice jointly set reduction magnitude and timing.