Sewa
v0.1 · free & open source

Turn your prescriptions into a daily schedule you can trust.

Sewa reads your medication list, checks each one against the FDA’s drug label database, and builds a daily plan with every placement explained.

Build a scheduleSee an example
Example regimen · 5 medications
Resolved
06:30
Levothyroxine 75 mcg
Empty stomach, ≥30 min before breakfast. Food reduces absorption by up to 40%.
FDA §2.1
08:00
Lisinopril 10 mg
Morning dose. May be taken with or without food.
FDA §2.2
11:00
Calcium carbonate 600 mg
4-hour gap from levothyroxine. Calcium binds to thyroid hormone in the gut.
ONCHigh
19:00
Metformin 500 mg
With dinner. Reduces GI side effects.
FDA §2.1
22:00
Atorvastatin 20 mg
Bedtime preferred. Cholesterol synthesis peaks overnight.
FDA §12.3
100% client-side
Data never leaves your browser unencrypted
Every claim cites FDA label or ONCHigh
MIT licensed
Why this exists

Free, citable medication reasoning got harder to build in Jan 2024.

The U.S. National Library of Medicine discontinued its public Drug-Drug Interaction API in January 2024 — infrastructure that open-source tools had relied on for a decade. Commercial vendors filled the gap with paid products.

Sewa rebuilds that capability as a public good, pairing a curated interactions dataset with a constraint solver that shows its reasoning instead of asking you to trust a black box.

How it works

Five steps from list to verified schedule.

Each step is deterministic, cited, and runs in your browser.

01Client-side

Paste your list

Plain English, any format. No account required.
02~2s

Normalize & match

Each drug resolved via RxNorm and matched to its FDA label.
03Deterministic

Solve the schedule

A constraint solver places each dose, respecting food rules and interactions.
04Transparent

Explain every placement

Plain-language reasoning with a citation to the source.
05PDF

Print for review

A fridge copy and a one-page version for your pharmacist.
Not medical advice
Sewa generates a draft schedule for review with a qualified pharmacist or prescriber. It does not diagnose conditions, recommend dose changes, interpret lab results, or replace clinical judgment. Every clinical claim in the output is cited so your pharmacist can verify the reasoning in under a minute.