Current usual care includes standard discharge counseling by a nurse, with or without additional MD counseling.

HELPix parents will receive usual care as above, after which trained staff will generate HELPix patient-/regimen-specific medication instruction sheets and review them with the parent.

After parent receives usual care and HELPix (as above), trained staff will walk parent through the app on-boarding process to overcome initial barriers to use. Steps: 1) Parent texted link to personalized on-line instructions. 2) Parent clicks link to app

HELPix parents will receive usual care as above, after which trained staff will generate HELPix patient-/regimen-specific medication instruction sheets and review them with the parent. Instruction sheets include optimized instructions (mL-only, doses appropriately rounded, visuals of recommended tool (e.g. 1-mL syringe best for doses of <1 mL), explicit frequency information (e.g. 'morning and night' instead of '2x/day') reinforced by pictograms (e.g. sun/moon icons)). For each medication, staff will: 1) review the dose (refer to the pictographic dose diagram, which illustrates optimal dosing tool filled to correct amount), 2) demonstrate the dose using optimal dosing tool, 3) ask parent to 'teachback'/'showback' dose (e.g. parent shows provider how much they would give by pulling back plunger on syringe to right level), 4) provide optimal dosing tool for the parent to take home. We anticipate this process will take ~5-10 minutes.

HELPix (health literacy-informed written materials and verbal counseling in addition to usual care) and HELPix+TECH (a health literacy-informed web application in addition to HELPix and usual care) will result in improved dosing compared to usual care alone. This will be assessed by the percentage of observed dosing error (whether clinically meaningful errors of >20% deviation and/or large error of >40% deviation).

HELPix (health literacy-informed written materials and verbal counseling in addition to usual care) and HELPix+TECH (a health literacy-informed web application in addition to HELPix and usual care) will result in improved medication adherence compared to usual care alone. This will be assessed by the percentage of poor medication adherence (>20% deviation from # prescribed doses).