Vyvanse is a prodrug — your body converts it gradually in your red blood cells, which is why it feels smooth and steady. It holds a fairly flat plateau for several hours before dropping off steeply.
Ramp up takes ~90 minutes. A high-fat meal can delay this by up to an hour.
The crash is real and documented — a steep pharmacological drop, often just 15–30 minutes from fine to terrible. Not a mood problem.
Adderall IR 10mgImmediate-release stimulant
Kicks in
30–60m
Peak effect
1–2h
Duration
4–5h
Adderall IR releases the full dose at once — rises quickly, peaks, and fades in a smooth bell shape. Its fast onset is exactly what makes it useful as a booster: it can be timed to catch the Vyvanse drop before the crash hits.
Timing is everything. Adderall IR needs to be taken before the crash begins — not after. Once the crash hits, it can shorten it but can't prevent it.
Sleep matters. Clinical guidance recommends no later than 6 hours before bedtime.
How DoseLog calculates your suggested Adderall time
Vyvanse taken at8:00 AM (example)
+ Duration8 hours → wears off ~4:00 PM
− Adderall onset45 minutes to kick in
− Lead buffer45 minutes before crash
Take Adderall by~2:30 PM
At launch these numbers use clinical averages. As Julia logs more data, the recommendation will adjust to her real patterns — labeled clearly as "based on your data."
Things that can affect timing
Food before Vyvanse — a high-fat meal can delay onset by up to an hour, shifting your whole day's timing.
Vitamin C and citrus — taken close to an Adderall dose, acidic foods can reduce absorption.
Your metabolism — clinical averages are starting points. Your logged data will reveal your actual patterns over time.
Copy the prompt below and paste it into any AI assistant. Then copy your app history and paste it into the same conversation.
About My App
App History for AI Analysis: Last 60 Days
Paste this into the same AI conversation after the prompt above. The AI will use it to analyze your patterns.
Export for AI Analysis
Run these two queries in your Supabase SQL Editor to export all data for config tuning. Paste results into your Claude session along with the prompt file.
Query 1 — Daily Logs
SELECT
log_date, vyv_taken, vyv_time, vyv_dose, vyv_time_2, vyv_dose_2,
vyv_wore_off, vyv_severity, vyv_notes, add_taken, add_time, add_dose,
add_notes, overall_notes
FROM dose_logs
ORDER BY log_date ASC;
Query 2 — Config Values
SELECT med, duration_hours, onset_hours, recommended_lead_mins, data_source
FROM dose_config
ORDER BY med ASC;
Full instructions and the Claude prompt template are in doselog-ai-config-prompt.md in your project folder.