Add every botanical the patient is taking and every drug class they are prescribed. You get a severity grid, the mechanism behind each cell, the herb–herb overlaps that a pairwise checker would miss, and a composite index with its arithmetic on display.
Peak severity 0No signal across 0 populated cells in a 1 × 2 grid, plus 0 herb–herb overlaps.
index = 22×0 + 4×0 + 2×0 + 6×0, capped at 100
The index is a triage aid, not a validated instrument. It is printed with its own formula so a reviewer can disagree with the weighting and recompute.
| Botanical ↓ Drug class → | Anticoagulants | Cardiac glycosides | Row peak |
|---|---|---|---|
| Glycyrrhiza glabra
Licorice |
— | — | 0No signal |
Band height is severity. A superscript ᵖ marks a rule prediction rather than a curated finding. An em dash means no edge in the knowledge base — which is not the same as no interaction.
Nothing to act on from this grid.
Standing advice regardless of the grid: record the product, brand and batch, not just the plant name. Most botanical adverse events trace back to what was actually in the bottle rather than to the species on the label.