$17.99 28% off
Cotrasen — now 28% off on Deal Dog. This page updates as the deal changes.
As an Amazon Associate, Deal Dog earns from qualifying purchases.
Real price drops and working promo codes — every one price-checked and refreshed all day.
Working promo codes on real deals — copy the code, apply it at checkout, and stack the savings on top of the drop.
Every live deal, ranked and price-checked throughout the day
Every price on Deal Dog is checked before it goes live, then re-checked roughly every four hours, around the clock. If we can't confirm a price, the card shows "See price on Amazon" instead of a stale number, and each card lists exactly when it was last verified. If a deal ever looks off, trust the verified timestamp over the price.
Codes stay hidden until you open a deal. Tap "Reveal Code" and it copies straight to your clipboard as you head to Amazon, so there's nothing to memorize or retype at checkout.
Prime Student gets you six months free with a valid .edu email, and anyone new to Prime can grab a 30-day free trial; cancel anytime.
Deal Dog checks prices and brand-partner offers around the clock, so what you see here is always changing. Hit refresh any time, or grab the app for push notifications about new deals.
Deal Dog for iPhone
Push alerts the moment a deal drops, one-tap promo code reveals, and the same price-checked deals in your pocket.
★★★★★ Real deals, checked every day
Get the best deals and promo codes on Amazon, hand-picked and refreshed all day.
Open your camera and scan the QR code to get the app instantly.
Deal Dog
Sign in to save your deals
No password needed — we’ll email you a secure link that signs you right in.
Check your inbox
We sent a sign-in link to . Tap it to finish — it expires in 15 minutes.
Get the Deal Dog app
Deal alerts, app-only promo codes, and points for showing up.
Deal Dog app
View this deal in the app
Open it in Deal Dog, or keep shopping right here.
