A closer look at your sleep aid
5 reasons to take another look at your PM sleep aid.
That familiar box may have more in common with Benadryl than you thought. Here’s what that means for your next bedtime choice.
Read the 5 reasons
The name on the front only tells part of the story.
You reach for something to help you sleep. You want a decent night, and enough energy to enjoy the day that follows. So finding an allergy-medicine ingredient in a familiar sleep aid can come as a surprise.
The connection is diphenhydramine. It is the active ingredient in both Benadryl Allergy UltraTabs and ZzzQuil Nighttime LiquiCaps, the two specific US products in the photo. Once you spot it, the next questions are practical: why is it there, what changes as we get older, and what else could you choose?
These five reasons walk through that decision, including an antihistamine-free formula from Steadia.
The same ingredient is sold for allergies and for sleep.
Turn over these two boxes and the active ingredient line matches. Benadryl Allergy UltraTabs list diphenhydramine HCl, 25 mg per tablet. ZzzQuil Nighttime LiquiCaps list diphenhydramine HCl, 25 mg per LiquiCap.
Diphenhydramine is an antihistamine. It can cause drowsiness, which is why the same ingredient appears in a nighttime sleep product. The boxes have different purposes on the front, but that shared ingredient is doing the work inside.
What it does mean is that the familiar word “nighttime” tells you less than the active ingredient line. That one line is a useful place to start when you are deciding whether a sleep aid still belongs in your routine.
25 mg
Diphenhydramine HCl per tablet or LiquiCap
The same active ingredient and amount in the two specific US products pictured above.
| Compare the labels | Benadryl Allergy UltraTabs | ZzzQuil Nighttime LiquiCaps |
|---|---|---|
| Active ingredient | Diphenhydramine HCl | Diphenhydramine HCl |
| Amount per unit | 25 mg per tablet | 25 mg per LiquiCap |
| Label purpose | Antihistamine | Nighttime sleep aid |
A sleep aid you used years ago deserves a fresh look after 65.
A product can be easy to buy and still deserve more care as we get older. The American Geriatrics Society includes oral diphenhydramine on its list of medicines that adults 65 and older should generally avoid, including when it is used for sleep.
Its older-adult guidance points to problems such as confusion, constipation and dry mouth. None of that is what you want from something you take every night.
It is easy to keep buying what once seemed to work. You remember the box, know where it sits on the shelf and do not have to think about another choice. But your age, health and daily medicines may have changed since that first purchase.
The useful question is whether that ingredient still belongs in your bedtime routine today.
You can choose sleep support without an antihistamine.
Steadia Sleep contains no antihistamine. Its two-capsule serving pairs 2 mg of melatonin with valerian, chamomile, lemon balm, passionflower, GABA and L-tryptophan.
Melatonin is the hormone your body makes in response to darkness. It helps signal that it is nighttime. That gives you a different kind of ingredient to consider when you are looking beyond the familiar PM box.
The four herbs in the blend have a long history of use for rest and relaxation. GABA and L-tryptophan complete the formula. You can see every amount farther down this page, so you can compare the whole serving before making a choice.
If finding diphenhydramine in your sleep aid has you rethinking what you take at bedtime, this is a simple place to start.
The morning after belongs in the decision, too.
Getting through bedtime is only part of what you want. There is also the morning: making breakfast, getting out for a walk, driving to an appointment or feeling ready when the grandchildren arrive.
If you have ever felt heavy or foggy after a sleep aid, you know why that matters. Being drowsy at night and being happy with the next morning are two different things to pay attention to.
When you compare options, look at the active ingredient, the amount in a serving and how you feel the next day. Steadia uses a gentle 2 mg of melatonin and no antihistamine. It’s made to help you fall asleep, stay asleep and wake up clear.
The customer stories below describe what people noticed. Keep your goal in view: a restful night and a morning you’re ready for.
You can read the complete formula before you change your routine.
You should not have to order a bottle to find out what is in it. The full Steadia Sleep serving is shown below, with all seven ingredients and their amounts. The product page also shows the complete Supplement Facts label.
That makes it easy to compare with the PM product you already have. Put the two labels side by side and the difference is plain: no antihistamine.
If you choose Steadia, the routine is two capsules with water at bedtime. A bottle has 30 servings. You can buy one bottle without signing up for repeat orders, or choose a subscription if you prefer regular refills.
The next step is simply to look through the formula, read the customer experiences and choose the purchase option that suits you. All of that is available before you place an order.
Every ingredient. Every amount.
Here’s what’s in your two capsules.
One serving contains 2 mg melatonin, four herbs, GABA and L-tryptophan. All seven amounts are shown below.
Melatonin is a hormone your body makes in response to darkness. The four herbs in this blend are valerian, chamomile, lemon balm and passionflower, which have a long history of use for rest and relaxation.
GABA and L-tryptophan complete the seven-ingredient formula. The amounts here are per two capsules, exactly as shown on the Steadia Sleep label. Other ingredients: gelatin capsule and brown rice flour.
Steadia Sleep
60 capsules · 30 servings
Serving size: 2 capsules
Customer reviews
Better nights matter. So do the mornings after.
No fog in the morning
“The store melatonin was 10 mg and I felt drugged until lunch. This is 2 mg with some herbs. I wake up clear, and I'm not pacing the kitchen at 2am anymore.”Dave R.Verified customer
I fall back asleep now
“I still wake up once on some nights. The difference is I drift off again instead of lying there until the sun comes up.”Sharon P.Verified customer
Not a subscription trap
“I got burned by a free trial years ago, so I was nervous. Skipping a month took two clicks, and the next bottle showed up right on time.”Patricia H.Verified customer
Real stories from Steadia Sleep customers.
A simple bedtime routine
Two capsules. A glass of water. Time for bed.
Each bottle holds 60 capsules: 30 two-capsule servings. Take two capsules with water at bedtime, at about the same time each night.
Keep a few simple notes about bedtime, wake-ups and how you feel in the morning. The Sleep guide, free with two or more bottles, has a seven-night tracker to help you do this.
Your next bedtime choice
Take a closer look at Steadia Sleep.
2 mg melatonin + four herbs, GABA and L-tryptophan. 60 capsules. 30 nights.
$39.99one bottle · one-time purchase
Or $33.99 with a subscription · save 15%
Choose your bottlesOne-time purchase or subscription. Choose on the next page.
Order on your terms
One bottle is $39.99 as a one-time purchase. Subscribe for $33.99 and save 15%. Two bottles save 15% before the subscription discount; three save 25%. The Sleep guide is free with two or more bottles.
Subscriptions repeat at the same price: one bottle every 30 days, two every two months or three every three months. You can skip or cancel before your next order is processed. A one-time order is always available.
Free shipping in the lower 48
Sleep guide free with 2 or more bottles
30-day refund on unopened bottles.
Which PM pills contain diphenhydramine?
Tylenol PM, Advil PM, Aleve PM and ZzzQuil LiquiCaps all list diphenhydramine as an active ingredient. Check the “Active ingredients” line on your box.
How do I take Steadia Sleep?
Take two capsules with water at bedtime, at about the same time each night. A bottle contains 60 capsules, or 30 servings.
Can I take it with my heart or blood pressure pills?
Many people who take Steadia Sleep are on heart or blood pressure pills, and it was made with them in mind.
Do I have to subscribe?
No. Buy one bottle once for $39.99, or subscribe for $33.99. Subscriptions save 15% and repeat at the same price. One bottle ships every 30 days, two every two months and three every three months. You can skip or cancel before the next order is processed.
What are the bottle savings?
Two bottles are $68.00 as a one-time purchase or $57.80 subscribed. Three are $90.00 as a one-time purchase or $76.50 subscribed. The Sleep guide is free with two or more bottles. Three bottles also include free shipping protection.
Where do you ship, and what can I return?
Shipping is free in the lower 48 US states. Steadia does not currently ship to Alaska, Hawaii or Canada. Unopened bottles can be returned within 30 days for a refund.
Sources and label notes
- Benadryl Allergy UltraTabs — US ingredient and amount per tablet.
- ZzzQuil Nighttime LiquiCaps — US ingredient and amount per LiquiCap.
- American Geriatrics Society: Health in Aging — Older-adult guidance for diphenhydramine and over-the-counter sleep medicines.
- NIH: Melatonin, What You Need To Know — Melatonin and the response to darkness.