How Much ZzzQuil Can You Safely Take?
In our latest question and answer, our pharmacist discusses the dosing recommendations for ZzzQuil Sleep Aid.
I just purchased ZzzQuil to help get some sleep. It says to only take one cap full but could I double dose without running into any issues? I’m about 350 lbs.
ZzzQuil Nighttime Sleep Aid is a product manufactured by Vicks in multiple formulations including:
- ZzzQuil Liquicaps
- ZzzQuil Warming Berry Liquid
- ZzzQuil Calming Vanilla Cherry Liquid
- ZzzQuil Soothing Mango Berry Alcohol Free Liquid
All ZzzQuil products contain the sedating antihistamine diphenhydramine, the active ingredient in Benadryl. While the onset of action of diphenhydramine is about 30 minutes, the maximum sedative effects begin 1-3 hours after taking the medication. For most, the duration of action ranges from 4—6 hours.
Liquid ZzzQuil Dosage Recommendations
All liquid formulations of contain 25 mg of diphenhydramine per 15 ml (one tablespoon). Per the manufacturer, the recommended dose is 30 ml (two tablespoonfuls) at bedtime, which equates to 50 mg of diphenhydramine. When using diphenhydramine as a sleep aid, single doses should not exceed 50 mg per dose.