By Darren · Published Nov 3, 2026 · Updated Nov 3, 2026
Not medical advice. This is a price comparison. Talk to your pharmacist or doctor before switching.
Aller-Tec vs Zyrtec: according to their Drug Facts labels on DailyMed, Costco’s Kirkland Signature Aller-Tec and brand-name Zyrtec Allergy both contain cetirizine HCl 10 mg per tablet. The price per tablet is very different.
Price status:
- Kirkland Aller-Tec 365, $17.99 online: Price checked Nov 3, 2026, 11:15 AM ET at Costco, online; may differ in-club and by region. The same page showed $13.49 in-warehouse (Seattle warehouse, ZIP 98101).
- Zyrtec 90 tablets, $39.97: Price checked Nov 3, 2026, 11:15 AM ET at Walmart, online; may differ in-club and by region.
- Checked with ZIP 95829 for Walmart and ZIP 98101 for Costco.
Do Aller-Tec and Zyrtec have the same active ingredient?
Yes. Both labels list the active ingredient as cetirizine HCl 10 mg per tablet, purpose: antihistamine (Aller-Tec label; Zyrtec Allergy label). DailyMed lists Aller-Tec as marketed under an ANDA (the FDA generic pathway) and Zyrtec Allergy under NDA019835.
Inactive ingredients can differ between brands. Compare the inactive ingredient lists on each label, or ask a pharmacist, if you react to any of them.
What does Aller-Tec vs Zyrtec cost per tablet?
Real Value Matrix
| # | Retailer | Price | Qty | Membership / buy | Cost per unit | vs. best |
|---|---|---|---|---|---|---|
| 1 | Costco (Kirkland Aller-Tec 365 tablets, in-warehouse) | $13.49 | 365 ct | — | $0.037/ct | Best |
| 2 | Costco.com (Kirkland Aller-Tec 365 tablets, online) | $17.99 | 365 ct | — | $0.049/ct | +33.4% |
| 3 | Walmart (Zyrtec 90 tablets) | $39.97 | 90 ct | — | $0.444/ct | +1,101.6% |
Membership fees are spread across your purchases per year. Prices change often — confirm at the retailer.
| Product | Price | Tablets | Per tablet, without membership | Est. per tablet, with membership share |
|---|---|---|---|---|
| Kirkland Aller-Tec 365 (Costco.com, online) | $17.99 | 365 | $0.049 | $0.064 (+$5.42) |
| Kirkland Aller-Tec 365 (Costco in-warehouse) | $13.49 | 365 | $0.037 | $0.052 (+$5.42) |
| Zyrtec 90 (Walmart) | $39.97 | 90 | $0.444 | $0.444 (no membership) |
Costco.com listed Aller-Tec 365 at $17.99 online, and the same page showed $13.49 in-warehouse. Trackers show different ranges. Warehouse Runner (updated Nov 3, 2026) lists $13.49 to $14.59 across warehouses. WarehouseHawk (Sterling, VA, viewed Nov 3, 2026) shows that store’s history from a low of $10.49 (Jul 6) to a high of $13.49 (Jul 20 and now). Walmart listed Zyrtec 90-count at $39.97.
Jump to how we check prices for the membership-fee method.
What do the labels say about directions and warnings?
Summarized from the Drug Facts labels linked above. Always read the full label on the package you buy.
- Adults and children 6 years and over: one 10 mg tablet once daily; do not take more than one tablet in 24 hours.
- Adults 65 and over, children under 6, and people with liver or kidney disease: ask a doctor.
- When using this product drowsiness may occur; avoid alcoholic drinks; be careful when driving a motor vehicle or operating machinery.
- Ask a doctor or pharmacist before use if you are taking tranquilizers or sedatives.
- The Aller-Tec label says “Do not use if you have ever had an allergic reaction to this product or any of its ingredients or to an antihistamine containing hydroxyzine.”
- The label says to stop use and ask a doctor if “an allergic reaction to this product occurs.”
- If pregnant or breast-feeding, ask a health professional before use.
Is Aller-Tec a good dupe for Zyrtec?
DUPE: Same active ingredientSame active ingredient and strength per the labels, at about a ninth of the price per tablet online before membership ($0.049 vs $0.444; about a seventh with the estimated fee share). In-warehouse it’s about a twelfth ($0.037; about an eighth with the fee share). Talk to your pharmacist or doctor before switching.
Is a 365-count bottle right for you?
Check the expiration date against how much you expect to use before buying a large bottle.
Bulk Viability Check
Stocking up on household basics too? See Kirkland vs Charmin cost per sheet.
How do we check prices?
We read each price on the retailer’s own product page where it loads, or from a named third-party tracker where it doesn’t (we say which in the notes). We divide the price by the pack quantity to get a cost per unit. For warehouse clubs we show two numbers: the shelf price alone, and an estimate that adds a share of the basic membership fee (Costco $65/yr, Sam’s Club $60/yr) charged in full to this one item. We spread the annual membership fee over an assumed 12 trips a year ($65 Costco = $5.42/trip; $60 Sam’s Club = $5.00/trip). If you already have a membership, use the first number.
Where do these facts and prices come from?
- DailyMed: Kirkland Signature Aller-Tec Drug Facts label
- DailyMed: Zyrtec Allergy (cetirizine HCl 10 mg) Drug Facts label
- Walmart: Zyrtec 24 Hour, 90 tablets
- WarehouseHawk: Aller-Tec price history (Sterling, VA)
- Warehouse Runner: Costco Aller-Tec warehouse prices (updated Nov 3, 2026)
- Costco: Kirkland Signature Aller-Tec, 365 tablets
Frequently asked questions
Is Kirkland Aller-Tec the same as Zyrtec?
Both labels list the same active ingredient and strength, cetirizine HCl 10 mg. Inactive ingredients may differ.
Can I switch from Zyrtec to Aller-Tec?
Talk to your pharmacist or doctor before switching.
How much cheaper is Aller-Tec per tablet?
About $0.049 per tablet at $17.99 on Costco.com, or $0.037 at the $13.49 in-warehouse price, vs about $0.444 for Zyrtec 90-count at Walmart. All figures are before the membership fee.
Does Aller-Tec cause drowsiness?
Both labels warn that drowsiness may occur.
About the author: Darren is the founder of Frugal Deals Hub. He compares prices at US warehouse clubs and retailers (Costco, Sam’s Club, Amazon, Walmart and Target) by cost per unit, using prices checked on each retailer’s own pages and dated on every post.