Telfast vs Claratyne vs Zyrtec: cheapest hayfever tablets in Australia (generics compared)

I have hayfever. Spring in Brisbane sets me off, sometimes badly enough that I'm running through a 30-pack of Claratyne in three weeks. At $18 a pop, that's $20+ a month for three months a year just to be able to function outside.

Then I worked out that the generic equivalent costs about a third of that, which annoyed me on principle, so I went down a research rabbit hole on the three main non-drowsy antihistamines sold in Australia. What I found is more useful than the pillar article had room for — there are actually meaningful differences between the three drugs (not just the brand vs generic question), and most people don't realise they have a choice.

Here's the practical guide I wish I'd had.

The three main non-drowsy antihistamines in Australia

These are all "second-generation" antihistamines, which is the technical way of saying "they don't make you sleepy like the old phenergan-style ones did." Each is sold under multiple brand names — and as a generic — at dramatically different prices.

These are roughly equivalent comparisons after normalising pack sizes — generics usually come in 50- or 100-packs while the branded versions are sold in 30s. The per-pill price gap is what matters.

Each of these is the same drug at the same dose as its branded counterpart. Same TGA approval standard. Often made in the same factory. The pillar article on generic vs brand pain relief goes into the regulatory side in detail — TL;DR: there's no quality compromise, you're paying for marketing.

But which drug should you actually pick?

This is the bit most "save money on hayfever tablets!" articles skip. The three drugs are NOT interchangeable — they have meaningfully different profiles. Here's the honest comparison.

Loratadine (Claratyne / generic)

How long it lasts: About 24 hours. Once-daily dosing.
Onset: Around 1-3 hours.
Drowsiness risk: Very low. Genuinely non-drowsy for most people.
Best for: Mild to moderate seasonal hayfever where you want steady all-day coverage.

This is the default starter. It's the one I'd try first if you've never taken any of the three, because it has the best drowsiness profile (lowest risk of feeling foggy at work) and a long enough duration that you only think about it once a day.

Cetirizine (Zyrtec / generic)

How long it lasts: About 24 hours.
Onset: Faster than loratadine — often within an hour.
Drowsiness risk: Higher than loratadine. Some people genuinely feel sleepy on it.
Best for: More severe hayfever, or when loratadine isn't quite cutting it.

Cetirizine is generally considered the most powerful of the three for actual symptom relief, but at the cost of being more sedating. If you take it and feel drowsy, that's not in your head — it's a known characteristic of the drug. For evening dosing, this is fine and even useful (some people sleep better through congested nights). For 9am dosing before a workday, it can be a problem.

Fexofenadine (Telfast / generic)

How long it lasts: About 24 hours at 180mg dose.
Onset: 1-3 hours.
Drowsiness risk: Lowest of the three. Usually classed as the least sedating.
Best for: People who got drowsy on the other two, or who need to be at peak alertness.

Telfast is the premium-priced one and the marketing leans hard on the non-sedating angle. The marketing is right that it's the least sedating — but loratadine is also basically non-sedating for most people, so you're often paying a 50% premium for a marginal difference. If you've tried loratadine and felt even slightly foggy, fexofenadine is worth the extra cost. If loratadine works cleanly for you, fexofenadine is overkill.

Where to actually buy each one

For hayfever generics specifically, Chemist Warehouse is genuinely the best option in most cases. Here's the honest pecking order:

1. Chemist Warehouse, in person or via their website. Their generic loratadine, cetirizine, and fexofenadine are about as cheap as you'll find anywhere. They stock multiple generic brands so prices vary; the cheapest is usually whatever's currently on special.
2. Amazon AU pharmacy sellers. Brands like CutPrice Pharmacy and FB Pharmacy list generic loratadine and cetirizine on Amazon. Prices are competitive but vary; sometimes Amazon wins, sometimes Chemist Warehouse does. Worth a price check both places before committing to a 50- or 100-pack.
3. Coles or Woolworths pharmacy aisle. Generally more expensive than the dedicated chemists. Convenient if you're already there but not the best price.
4. Independent pharmacies. Most expensive option. If your local pharmacy is the only one that's open, fine, but otherwise skip.

Stacking strategies that actually work (and don't)

Some people combine antihistamines or alternate them on a schedule. Brief notes on what's safe and what isn't:

Safe-ish: taking a daily long-acting (loratadine or fexofenadine) and adding a saline nasal rinse. The mechanism is different so they stack cleanly. This works really well for chronic mild hayfever.

Generally fine but talk to a pharmacist: taking a daily antihistamine and adding a steroid nasal spray (like Nasonex or Avamys). These target different parts of the allergic response and many people do both long-term.

Don't double up on the same drug class: taking loratadine AND cetirizine at the same time isn't dangerous but it's not more effective — they're both H1-receptor blockers, you're just paying twice.

If none of the three work: talk to a GP. There are prescription options (montelukast, prescription-strength corticosteroids, immunotherapy) that get prescribed for hayfever that doesn't respond to over-the-counter antihistamines. Don't suffer through it indefinitely.

The annual savings, for a real hayfever sufferer

For someone who takes a daily antihistamine through Australia's three-month peak hayfever season (roughly September to December in most regions, varying by location), here's what the switch actually saves:

• If you take Claratyne currently: ~$54 for the season at brand price, ~$18 for the generic. Save $36/year.
• If you take Zyrtec currently: ~$66 for the season at brand price, ~$24 for the generic. Save $42/year.
• If you take Telfast currently: ~$90 for the season at brand price, ~$45 for the generic. Save $45/year.

Not life-changing on its own, but it's stacking with everything else — see the full breakdown in the generic vs brand pain relief pillar article. The combined annual saving across paracetamol, ibuprofen, and antihistamines for an average household sits in the $80-150 range — biggest if there's a hayfever sufferer on year-round antihistamines, smaller if you're only buying the occasional headache pack.

The bottom line

1. Try generic loratadine↗ first. It's the cheapest, has the cleanest non-drowsy profile, and works for most people.
2. If loratadine doesn't fully control your symptoms, try generic cetirizine↗ — stronger, but watch for drowsiness.
3. If you're getting drowsy on the others or need to be at peak alertness, try generic fexofenadine↗.
4. Never pay for the brand. The generic is the same drug. CHOICE has been confirming this for years.
5. Buy a 50- or 100-pack at the start of hayfever season. Stash it where you'd normally reach for the brand. The habit takes care of itself.

If you've never bothered with generic switching before, this is genuinely the easiest place to start. It's seasonal, it's well-defined, and you'll burn through a pack in the next few months and immediately notice the difference.