Glossary
Interaction Risk
Updated February 28, 2026
Interaction risk is the chance that two or more compounds amplify, dampen, or mask each other's effects in your body.
Why it matters
You can get a larger effect from a mix than from a single ingredient, especially with variable timing, sleep debt, and medication changes.
Severity model
Use this practical triage map:
- Mild: duplicate stimulants, mild jitter, short-term GI upset
- Moderate: overlapping serotonergic activity, repeated headache with hydration shifts, moderate blood pressure volatility
- Severe: breathing changes, chest pain, severe neurologic changes, signs of significant bleeding
High-impact overlap patterns
- Additive stimulant load from caffeine compounds plus other wake-promoting agents
- Serotonergic overlap across supplements, nootropic herbs, or psychiatric prescriptions
- Electrolyte shifts from multi-mineral plus stimulant or training-support stacks
Screening cadence
- Screen once during setup and log review
- Re-screen after any medication change, dose increase, or new prescription
- Re-screen again if sleep, anxiety, BP, or neurologic symptoms change for 24–72 hours
Escalation and urgent actions
- Stop immediately and contact urgent care for chest pain, severe dyspnea, confusion, high fever, or uncontrolled bleeding.
- Pause the affected stack and request clinician review for persistent moderate overlap signs.
- Resume only with explicit clearance and reduced overlap complexity.
Practical action step
Before adding or increasing any ingredient, log current medications, timing windows, and hydration status in one note, then check overlap only after a two-dose confirmation window.
Uncertainty and limits
- Evidence is limited for rare combination patterns that are not represented in standard interaction databases.
- Evidence is limited on exact interaction severity when adherence logs are delayed or incomplete.
Cross-site references
How this appears in Unfair
Unfair uses interaction risk to raise warning levels, alter ranking order, and suppress new stacks when overlap exceeds conservative thresholds.
Clinical safety note
If severe overlap signs appear, treat this as a medical escalation signal and avoid self-escalation until reviewed.