What Astepro is
Astepro Allergy is azelastine hydrochloride 0.15%, an antihistamine nasal spray. It blocks histamine right in the lining of your nose. It contains no steroid. The item we link to is the 24-Hour Allergy 60-metered-spray bottle, bundled with tissues.
Dosing for adults and children 12 and up is 1 or 2 sprays per nostril twice a day, or 2 sprays per nostril once a day. Children 6 to 11 use 1 spray per nostril twice a day, with an adult helping. Prime the pump as the label directs before first use.
How well it works
Speed is Astepro's strength. In a 2024 exposure-chamber trial, adults exposed to ragweed pollen got azelastine 0.15% or a placebo spray. Symptoms improved significantly versus placebo 30 minutes after dosing, and stayed better for the rest of the session PMID: 39067509. Most of its authors work for Bayer, which makes Astepro. An earlier chamber trial of an azelastine spray found improvement at 15 minutes. Over that 8-hour session, it also beat a steroid spray started the same day PMID: 17882923.
That second result needs context. Steroid sprays take days to build up, so on day one a fast antihistamine will win. It doesn't mean Astepro beats a steroid spray over a whole season.
What it treats well: sudden sneezing, runny nose and itchy nose, such as a surprise high-pollen day or a visit to a house with a cat.
What it treats less well: ongoing daily congestion. For that, a steroid spray such as Flonase or Nasacort has the deeper evidence.
Taste, drowsiness and other side effects
- Bitter taste is the complaint you'll hear most. It comes from spray running down the back of the throat. Sniff gently and tilt your head forward.
- Drowsiness is possible even though it's a spray. The label warns about it. Avoid alcohol and sedatives, and be careful driving until you know how it affects you.
- Nose discomfort and nosebleeds can happen. Aim away from the septum.
In the 2024 trial, side effects were mild. They included bitter taste, nasal discomfort, nosebleeds and nausea PMID: 39067509.
Ask a clinician first if you're pregnant or breastfeeding, or if you take other medicines that cause drowsiness.
Astepro vs. Flonase, or both?
They do different jobs. Flonase is the slow, steady daily base. Astepro is the fast one.
They also work well together. A meta-analysis of randomized trials found that azelastine plus fluticasone lowered nasal symptom scores more than placebo, azelastine alone, or fluticasone alone PMID: 30961435. The authors saw the combination as a second-line step for people whose symptoms aren't controlled on one spray.
A prescription spray puts both drugs in one bottle. If you buy over the counter, you can use Astepro and Flonase (or Nasacort) as separate sprays. Check with a pharmacist first about the dose and timing for you.
Who should buy it
Buy Astepro if you need relief within the hour, want a steroid-free spray, or have occasional flare-ups rather than daily symptoms.
Add it to Flonase or Nasacort if a steroid spray alone isn't enough after a couple of weeks of daily use.
Skip it if you're very sensitive to bitter tastes, or one steroid spray already controls your symptoms. See how it compares with other options in our best nasal sprays for allergies.