First line
Cetirizine
A once-daily antihistamine that calms sneezing, itching and a running nose. Low drowsiness for most men, and easy to stay on through the season.
Read the guide →Men's allergy care
Allergies
Sneezing through meetings and waking up blocked isn't normal, it's treatable. Here's what Bangkok's air is doing to your nose, and what a doctor can do about it.
1 in 4
Adults affected
Year-round
Bangkok triggers
45 min
Private consult
TH·EN·ZH
Spoken here
Medically reviewed by Dr. Noppon Arunkajohnsak (Win)
MOPH-licensed clinic
4.6 from 158 Google reviews
92% five-star ratings
Private & confidential
Signs
Sneezing fits, worst in the morning
A blocked or constantly running nose
Itchy, watery eyes
Postnasal drip and a nagging cough
Poor sleep and daytime fatigue from congestion
Common causes
Dust mites, thriving in Bangkok's humidity
PM2.5 and traffic haze inflaming the airways
Mould spores, worst in rainy season
Pollen from grasses and trees
Pet dander and cockroach allergens indoors
When to see a doctor
Symptoms run most days for weeks on end
Pharmacy antihistamines aren't holding it
A blocked nose is wrecking your sleep or causing snoring
Sinus infections keep coming back
You wheeze or feel tight-chested with it
Understanding the condition
It's your immune system, not a cold
Allergic rhinitis is an immune overreaction to harmless particles like dust mites, mould and pollen. Your body releases histamine, and histamine is what makes you sneeze, itch and block up. In Bangkok, humidity keeps dust mites and mould active all year, and PM2.5 season inflames airways that are already irritated.
Most men treat it as a cold that never ends, or blame the pollution and leave it there. A proper assessment separates true allergy from pollution irritation and sinus infection, because the treatment is different for each.
Once the cause is clear, control is realistic for most men: the right antihistamine at the right dose, practical trigger control at home, and step-up options if symptoms push through.
Most men have lived with the symptoms so long they think it's normal. It isn't. A blocked nose every morning is a treatable problem.
Our solutions for allergies
A simple plan that starts with the cause
We work out what you're reacting to first, then keep the plan simple. For most men it starts with one well-chosen tablet, taken properly.
Dosing & timing
Getting the dose right
When to take it, how long to stay on it, and what to do when one tablet isn't holding. The guide covers what the packet doesn't.
Read the guide →Know your options
Cetirizine vs the older antihistamines
How it compares with the drowsier first-generation tablets, and what a doctor can add if symptoms persist despite daily treatment.
Read the guide →Your journey
What happens when you come in
1. Private consult
45 minutes, one to one. We map your symptom pattern against your home, your commute and Bangkok's seasons, because timing usually points to the trigger.
2. Finding the trigger
Examination of the nose and airways, and blood tests where they'd change the plan, so allergy isn't confused with infection or pollution irritation.
3. Your plan
The right antihistamine, dose and timing, plus practical trigger control at home. Honest options, clearly explained. You decide, never pressured.
4. Same doctor follow up
A review with the doctor who saw you. If symptoms push through, the plan steps up; if wheeze or sinus disease is suspected, you'll know the next move.
Meet the doctors
Who you'll see
Young, specialized and highly experienced, trained internationally. The same doctor from consult to follow-up.
/)
/)
/)
What our patients say
/)
Book your consultation today.
Medications & supplements
“In Thailand you can buy almost anything over the counter but that does not mean you should. Having Dr. Win properly prescribe and dose my medication gives me confidence it is both safe and effective.”
Pierre L. · Verified patient review
Learn more about men's health
Explore the latest posts on men's health, including trends in wellness, fitness, and nutrition.
Allergies
Cetirizine in Thailand: What It Is and How to Get It
Allergies
Daily Antihistamines: Dosing, Timing and Staying on Track
Frequently asked questions
Is it allergies or just Bangkok pollution?
They overlap, which is why so many men guess wrong. Itchy eyes and sneezing fits point to allergy; burning eyes and a raw throat on high-PM2.5 days point to irritation. Many men in Bangkok have both, and an exam with targeted tests separates them so the treatment fits.
Will antihistamines make me drowsy at work?
The older tablets often do. Cetirizine is a second-generation antihistamine and most men tolerate it well, though a minority feel some drowsiness. If it affects you, timing the dose at night or switching agents usually solves it.
Is it safe to take an antihistamine every day?
For most people, second-generation antihistamines at standard doses are considered suitable for regular use through a season or longer. The consult confirms it's the right choice for you, checks interactions with anything else you take, and sets a review point.
Do I need allergy testing?
Not always. A careful history and examination often identify the trigger without any testing. Blood tests earn their place when the result would actually change the plan, for example before committing to major changes at home.
When is a blocked nose something more serious?
One-sided blockage, recurring sinus infections, loud snoring with daytime exhaustion, or wheeze and chest tightness all deserve a proper look. These can point to sinus disease, sleep-disordered breathing or asthma, and the consult screens for each.
Stop treating it like a cold
Stop treating it
like a cold
/)