Systane Ultra 0.4% / 0.3% eye drops, 1, Each Eye, 6 hourly, PRN
systane -> polyethylene glycol-400 + propylene glycol
 {
  "is_medication": true,
  "brand_name": "Systane Ultra",
  "generic_name": "polyethylene glycol-400 + propylene glycol",
  "active_ingredients": [
    {
      "name": "polyethylene glycol-400",
      "strength": 0.4,
      "strength_unit": "%"
    },
    {
      "name": "propylene glycol",
      "strength": 0.3,
      "strength_unit": "%"
    }
  ],
  "prn": true,
  "form": "Solution",
  "route": "Ophthalmic",
  "systemic": false,
  "doses": 1,
  "daily_frequency": "6",
  "total_daily_dose": null,
  "total_daily_dose_unit": null}