Aerius

Aerius is a Desloratadine 5mg antihistamine tablet manufactured by Organon, a global originator pharmaceutical company. It belongs to the second-generation antihistamine class, also called selective H1-receptor antagonists.

Desloratadine is the active metabolite of Loratadine — when you take Loratadine, the liver converts it into Desloratadine before it can work fully. Taking Aerius, which is Desloratadine directly, skips that liver-conversion step, blocking H1 histamine receptors triggered by allergens such as dust, pollen, or pet dander.

Aerius is the first and only Desloratadine-based antihistamine in our lineup, different from the cetirizine and loratadine-based brands already available — a good option for anyone wanting an antihistamine that skips liver conversion.

Aerius (Desloratadine) relieves respiratory allergy symptoms from allergic rhinitis, including sneezing, runny nose, itchy nose, itchy and watery eyes, plus chronic urticaria (hives) and other allergic skin reactions such as itchy rashes.

It suits people with seasonal or year-round allergies (from dust, dust mites, or pet dander) and those with chronic hives needing continuous daily medication — especially people who drive or need focus at work, since Desloratadine causes low drowsiness and works quickly without needing liver conversion first.

Aerius is intended only for allergy symptoms — not for relieving a runny or blocked nose caused by the common cold, since the underlying mechanism is different.

Dosage: Adults and children aged 12 and over should take one tablet (Desloratadine 5mg) once daily, at the same time each day.

It can be taken with or without food — absorption is not significantly affected. It starts working within about 1 hour and provides relief for up to 24 hours, so one tablet a day is enough; no need for repeat doses during the day.

Aerius tablets must not be used in children under 12, as no safe dosage has been established for this tablet form in that age group.

Aerius is considered safe when used as directed. Reported side effects include headache, dry mouth, fatigue, and mild drowsiness in some users. While Desloratadine generally causes low drowsiness overall, individual sensitivity varies — anyone who drives or operates machinery should test their own response before doing tasks that need full attention.

Less common side effects include palpitations, dizziness, and nausea. For a severe allergic reaction — rash, swelling of the face or throat, difficulty breathing — stop the medicine and seek emergency care immediately.

Contraindications:

• Not for use in children under 12, as no established safe dosage exists for this tablet form in that age group
• Not for anyone allergic to Desloratadine, Loratadine, or any ingredient in the tablet

Key precautions:

• Use only for allergy symptoms — not for relieving a runny or blocked nose from the common cold, since the mechanism doesn't address a cold's cause
• This medicine may cause drowsiness in some users — anyone driving, operating machinery, or working at height should test their response before doing so
• People with liver or kidney disease should inform their doctor or pharmacist before use, since this affects how the drug is cleared from the body

Aerius uses Desloratadine, a second-generation H1-antagonist like Loratadine, Cetirizine, and Fexofenadine also sold in store. All are oral tablets, but differ in active ingredient and onset:

• Z-Deen (Loratadine) — the parent compound, needs liver conversion first; more affordable
• Zyrtec (Cetirizine) — the original brand, fast-acting, tends to cause more drowsiness
• Telfast (Fexofenadine) — third-generation, least sedating, higher price
• Aerius (Desloratadine) — the active metabolite itself, no conversion needed, low drowsiness

Simple guide: Least drowsiness regardless of price → Telfast | Active form, no conversion step → Aerius | Original brand, fast onset → Zyrtec | Budget-friendly, low drowsiness → Z-Deen

Desloratadine (Aerius) and Loratadine are pharmacologically linked — Desloratadine is the active metabolite the liver automatically produces from Loratadine after you swallow it. The two main differences:

• Conversion step — taking Loratadine requires the liver to convert it into Desloratadine before full effect; taking Aerius (Desloratadine) directly skips this step
• Dose strength — Aerius uses 5mg per tablet, less than Loratadine's 10mg per tablet, since it's already in the fully active form

Both last 24 hours and cause similarly low drowsiness. Choose Aerius if you want the active form with no conversion step; choose Loratadine for a more affordable price.

Aerius starts working within about 1 hour of taking it, providing allergy relief faster than antihistamines that require liver conversion first — no need to build up over several days like some other treatments.

• First hour — sneezing, runny nose, and itchy nose/eyes start easing
• 3-8 hours — blood levels peak, giving the strongest symptom relief
• 24 hours — the medicine remains effective until the next daily dose

For chronic hives, continuous use over several weeks under a doctor's guidance may be needed to keep symptoms consistently controlled.

Where to Buy Aerius?

Order online at Intimo Life. We deliver across Thailand within 1-3 business days. All orders are packed discreetly, with no product name printed on the outer packaging.