Do I need a prescription to buy Nasaleze 800mg Allergy Blocker?

No. Nasaleze 800mg Allergy Blocker is an over-the-counter (OTC) product and can be ordered without a prescription. It is still dispensed by a registered pharmacist on DoctorOnCall.

What pack sizes does Nasaleze 800mg Allergy Blocker come in?

It is supplied in a pack size of 1s. Choose the pack size you need from the options shown on this page before adding the item to your cart.

Why is there no information here about what Nasaleze 800mg Allergy Blocker is for?

This page is limited to product, safety and handling information in line with Malaysian rules on medicine information. If you want advice on whether this product suits you, book an online consultation with a doctor or pharmacist on DoctorOnCall.

How should I use Nasaleze 800mg Allergy Blocker?

Use it exactly as stated on the pack label, without changing the amount or how often you use it. If anything on the label is unclear, check with a pharmacist before the first use, and read the Directions for Use section on this page.

Can I speak to a doctor or pharmacist about Nasaleze 800mg Allergy Blocker before I buy it?

Yes. DoctorOnCall offers online consultations with licensed doctors and registered pharmacists, so you can ask about this product, your existing medicines, or anything on the label before you place an order.

What should I do if I notice side effects after using Nasaleze 800mg Allergy Blocker?

Stop using the product and speak to a doctor or pharmacist about any reaction that concerns you. Seek medical care immediately for signs of a severe reaction such as difficulty breathing, swelling of the face, lips or throat, or a widespread rash. Reported reactions are listed in the Side Effects section on this page.

How long will delivery take?

Within Malaysia, standard delivery takes 3 to 5 working days. Same-day delivery is available in the Klang Valley for orders placed before 12pm; orders placed after 12pm arrive by the end of the next day. Orders to Singapore are sent as international deliveries and take 5 to 9 working days. A lump-sum shipping and handling fee applies to every overseas delivery and is shown at checkout.

What payment methods can I use?

Customers in Malaysia can pay by FPX online banking, credit or debit card (Visa and Mastercard), and supported e-wallets including Touch ‘n Go eWallet, GrabPay and ShopeePay. FPX and local e-wallets are tied to Malaysian bank and wallet accounts, so if your delivery address is in Singapore, use the payment options displayed at checkout for that address rather than assuming the same list applies.

Can Nasaleze 800mg Allergy Blocker be delivered to Singapore?

Yes. DoctorOnCall ships to Singapore as an international order dispatched from Malaysia, arriving in 5 to 9 working days with a lump-sum shipping and handling fee. Singapore’s Health Sciences Authority (HSA) allows personal imports of up to three months’ supply of a medicine for your own use or an immediate family member’s, as long as it contains no controlled drugs, psychotropic substances or prohibited items. Keep the product in its original labelled packaging and keep a copy of your prescription or doctor’s letter with it. Quantities above three months’ supply, and medicines containing controlled substances, require prior HSA approval.

Is Nasaleze 800mg Allergy Blocker registered with the authorities?

Products listed on DoctorOnCall are registered with Malaysia’s Ministry of Health for supply in Malaysia, and each pack carries its MAL registration number. An order delivered to Singapore arrives as a personal import of a Malaysia-registered product; HSA product registration is not required for personal-use quantities, but it is also not the same as a product registered for sale in Singapore. If you need a locally registered Singapore product, buy it from a pharmacy in Singapore.

Who do I contact if there is a problem with my order?

DoctorOnCall’s customer care team handles order, delivery and product queries through the contact channels on the site, including WhatsApp and the online help centre. For deliveries to Singapore, allow more time before chasing an order than you would for a local Malaysian delivery, as the parcel passes through customs clearance and tracking updates can appear later in the journey.

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Nasaleze 800mg Allergy Blocker

Q: What does Nasaleze 800mg Allergy Blocker contain?

Nasaleze 800mg Allergy Blocker is a healthcare product containing Natural cellulose powder, Peppermint powder and Essential food-grade ingredients. The full ingredient list is shown in the Ingredients section on this page and on the product packaging.

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Reviewed byDr. Mohd Izzat Amir Bin AwangDoctor of Medicine (MD), University of Mansoura - Manchester

Written byDr. Adeline Carol PetersBachelor of Medicine and Bachelor of Surgery (MBBS) — Manipal Academy of Higher Education (MAHE)

Last updated: October 27, 2026

Overview

Nasaleze 800mg Allergy Blocker is supplied as a healthcare product, with Natural cellulose powder, Peppermint powder and Essential food-grade ingredients. It is supplied in a pack size of 1s.

No prescription is required for this product, as it is an over-the-counter (OTC) medicine. This page is limited to product, safety and handling information.

If you would like guidance before buying, you can speak to a doctor or pharmacist through an online consultation on DoctorOnCall. Orders are dispensed by a registered pharmacist and delivered to your address.

Directions for Use

Gently blow your nose before use to clear the nasal passage. Shake the bottle well, then insert the nozzle just inside one nostril and apply one puff while inhaling gently through the nose; repeat for the other nostril. Avoid spraying into the eyes. For best results, use it regularly during allergy season or before expected exposure to a known trigger, such as gardening, cleaning a dusty area, or being around pets.

Dosage

The typical usage is one puff into each nostril, two to three times a day, or as frequently as needed during periods of allergen exposure. There is no fixed maximum daily dose because the product is not a systemic drug, but it should be used according to the instructions printed on the packaging.

Storage Instructions

Store below 25°C in a cool, dry place, away from direct sunlight and out of reach of children. Keep the bottle tightly closed between uses to keep the powder dry and free-flowing.

Side Effects

Common: Mild, temporary sneezing shortly after application.
Common: Temporary nasal dryness or a light tickling or irritating sensation in the nose.
Serious: Marked swelling, persistent irritation, or difficulty breathing are not expected with normal use, but would need prompt medical attention if they occurred.

Contraindications

Known hypersensitivity or allergy to cellulose powder, mint, or any other ingredient in the formulation.
Not intended to replace prescribed treatment for an active nasal or sinus infection, or for injuries inside the nose.
Not for oral, eye, or ear use — nasal application only.

Drug / Food Interactions

No pharmacological drug interactions are known, as this product is drug-free and works only as a physical barrier on the nasal lining rather than being absorbed into the bloodstream.
If another nasal spray or nasal medicine is being used at the same time, space the two applications a few minutes apart so one product does not physically wash away or block the effect of the other.
No specific food interactions are known.

Quick Tips

Use it before entering a high-allergen environment, such as during gardening, dusting, or visiting a home with pets.
Reapply after blowing your nose, as this can remove the coating.
Use it regularly during your known allergy season, following the directions on the packaging.
Do not substitute it for any medicine prescribed by your doctor without seeking advice first.
Avoid sharing the bottle with others for hygiene reasons.
Store the bottle in a cool, dry place so the powder stays free-flowing.

Relevant Information

Precautions: Nasaleze 800mg Allergy Blocker is drug-free, but anyone with a known sensitivity to cellulose or mint should avoid it. While manufacturer information describes suitability for pregnant and breastfeeding women and children from 18 months, individual circumstances can vary, so check the packaging and ask a pharmacist if you are unsure. It is not intended to treat an existing nasal infection or injury.

When to See a Doctor or Pharmacist: Speak with a doctor or pharmacist if allergy symptoms are severe, affect breathing, or are not well controlled despite using this product alongside your usual measures, as a prescribed antihistamine, nasal steroid, or further assessment may be needed. Also seek advice if you are pregnant, breastfeeding, or considering use in a young child and want individual guidance.

Frequently Asked Questions

Product Specifications

Classification	Non-prescription
Pack Size	1s
Shelf Life	A specific shelf-life duration for this product was not independently confirmed for this listing. Please use the product before the expiry date printed on the packaging, and do not use it if the expiry date has passed.