4.9/5  •  1,891 verified reviews

2-Step Toenail Fungus Treatment Kit

Day + Night System · Max-Strength 25% Undecylenic Acid · Clinically Reviewed

⏱ 24/7 Day + Night System

⚡ 25% Undecylenic Acid — max OTC strength

🩺 Industry-Reviewed

🛡 100-Day Money-Back Guarantee

Does this sound like you?

You've been fighting this for a while. Here's where you are now, and where you actually want to be.

Close-up of a toenail with fungal infection before treatment

Right now

  • Thick, yellow nails you keep hidden in closed shoes
  • You've tried things before — and it keeps coming back
  • Treatments felt messy, smelly, or too much hassle to keep up
  • Quietly worried about passing it to your partner or kids
Clear, healthy toenail after treatment

What you actually want

  • Clean-looking nails you're fine to show in sandals
  • Something that finally works — and keeps working
  • A few seconds, no mess, fits the routine you already have
  • Peace of mind that the people you live with are protected

A day pen that treats. A night patch that protects.

Applying the Treatonic Day Pen to a toenail in the morning Daytime · Step 1

The Day Pen

Your easiest daily step — built for real life.

  • About 5 seconds. Click the precision tip, swipe across the nail, done.
  • No wasted product. The click-tip releases a precise dose — nothing dripping, nothing thrown away.
  • No mess. No spilled bottles, no sticky brushes.
  • Dries fast. Goes on clean, no greasy film to wait around for.
  • Doesn't slow you down. Apply after your shower and head straight out.
Applying the Treatonic overnight renewal patch before bed Nighttime · Step 2

The Night Patch

Protect your family while you sleep.

  • A physical barrier. The occlusive patch seals over the nail before bed — shedding material is contained, not released onto your sheets.
  • Why it makes sense at night. The 7–9 hours you sleep are when shedding is heaviest and shared surfaces get contaminated.
  • Protects the household. Less fungal material in your shared bathroom and bed.
  • And it keeps treating. The sealed environment keeps the antifungal working — closing the overnight gap.

Loved On TikTok & Instagram

Thousands are sharing their results

Creators sharing their exciting moments — the day-and-night protocol, week by week.

Toenail fungus treatment results — @jordan.m @jordan.m
@jordan.m

"Six weeks in — the difference is wild."

Fungal nail patches overnight routine — @emilyrose @emilyrose
@emilyrose

"Easiest routine I've stuck to."

Antifungal nail patches for toenails weekly progress — @itsava.b @itsava.b
@itsava.b

"Documenting every week. Real progress."

Extra strength toenail fungus treatment pen — @chloe.t @chloe.t
@chloe.t

"This pen is the secret."

Before and After

Watch the transformation play out, week by week, on real customers' nails.

If creams, lacquers, pills or laser never lasted — here's why this is different

Most products in this category only address one variable. Treatonic was engineered to cover the structural reasons fungus comes back.

Topical creams Rx lacquers Oral pills Laser
Active strength25% UA1–10%10% efinaconazoleSystemic
Covers night hours~
Physical contamination barrier
Supports deep penetration~~
Liver / kidney riskNoneNoneNoneBlack-box warningNone
Prescription requiredNoNoYesYesOffice visit
100-Day Money-Back Guarantee
Cost (full protocol)$74.95$15–30 ×8–12$400+/yr$400+/yr + labs$1,200–$5,400

Better Results, Bigger Savings

Choose your supply

Free nail clipper kit
First 500 orders Free Nail Clipper Kit $19.99
1-Month Supply
Try the system
$1.67/ day
$49.99
  • 3 Precision Day Pens
  • 32 Overnight Renewal Patches
  • 100-Day money-back guarantee
3-Month Supply
Save 33%
Full cycle supply
$1.10/ day
$99.95$149.97
  • 9 Precision Day Pens
  • 96 Overnight Renewal Patches
  • Free U.S. shipping
Free nail clipper kitFREE Nail Clipper Kit $19.99
Secure checkout Free U.S. shipping Not a subscription

Each month's supply contains 3 precision Day Pens + 32 Overnight Renewal Patches. Typical use is a daily pen application plus nightly patch use across 3–5 affected nails. Because complete nail regeneration takes 6–12 months, we suggest starting with enough supply to maintain a stable treatment cycle without interruption. The free Nail Clipper Kit applies to the first 500 orders of a 2-month or 3-month supply, while supplies last.

100
Day
Guarantee

Risk-Free

Give the full protocol 100 days. If it's not for you, we'll refund you.

Toenails take months to grow out — so we give you the time the system actually needs. Use it consistently for 100 days. If you're not satisfied, contact us for a full refund. No return shipping required.

Start risk-free

What customers say after the full protocol

Pulled from verified buyers across Amazon and our website. Names anonymized to protect customer privacy.

4.9
Verified-buyer rating
12,000+
Verified buyers
82%
Repeat-buy rate
100
Days money-back

"Four years of going back and forth with my podiatrist. Tried two oral medications, three topical brands, even laser. Started Treatonic — and for the first time in years I could see actual clear nail at the base."

Verified Buyer Verified
Tried everything else

"The night patch was the piece I didn't know I was missing. Once I started using it nightly, the progress was different. Two of my three affected nails are now completely clear."

Verified Buyer Verified
Night patch was key

"My podiatrist reviewed the formula and said the Undecylenic Acid concentration was appropriate and the occlusive patch made sense. Best results I've had in three years of trying."

Verified Buyer Verified
Professionally reviewed

Review-aggregate figures shown are illustrative and to be confirmed against final verified data. Testimonials reflect individual experiences and are not representative of typical results.

Frequently asked

How long does it take to see results?
It depends on your nail and the severity of the infection. A toenail grows out fully over 6–12 months, so visible change is gradual as healthy nail replaces damaged nail. Consistency matters far more than speed — which is exactly why we offer 100 days to try it.
How many nails does one kit cover?
Each kit contains 3 Day Pens + 32 Overnight Patches. Typical use is a daily pen application plus nightly patch across 3–5 affected nails. For a full multi-month protocol, most customers choose the 2-Kit or Full Protocol option.
Will the overnight patch stay on while I sleep?
Yes. The patch is designed with a skin-friendly adhesive that wraps and seals around the nail. Press the edges firmly when applying for the most secure fit through the night.
Can I use Treatonic if I have diabetes or other conditions?
If you have diabetes, peripheral vascular disease, or any underlying condition, please consult your healthcare professional before starting any new nail treatment protocol.
Why 25% Undecylenic Acid? Why not a lower concentration?
25% is the maximum concentration permitted for Undecylenic Acid under the FDA OTC monograph. It's topical only, so there's no systemic absorption and no liver-function monitoring as with oral antifungals.
Do I need to throw out my shoes?
No. The overnight patch is designed to physically contain shedding so there's less material reaching your shared surfaces. Routine hygiene — clean, dry socks and letting shoes air out — is good practice alongside the protocol.
What if I don't see results within 100 days?
Contact us for a full refund — no return shipping required. We built the 100-Day guarantee specifically because nail care takes time and we want you to be able to give it a fair trial risk-free.
Is this a subscription? Will I be re-billed?
No. Every option here is a one-time purchase. You will not be enrolled in any subscription or re-billed automatically.