Do I need a prescription to buy Sunward Sunex Cough Syrup?

No. Sunward Sunex Cough Syrup is a non-prescription product and can be ordered without a prescription. It is still dispensed by a registered pharmacist on DoctorOnCall.

What does Sunward Sunex Cough Syrup contain?

Sunward Sunex Cough Syrup is a syrup containing Diphenhydramine Hydrochloride. The full ingredient list is shown in the Composition or Ingredients section on this page and on the product packaging.

What pack sizes does Sunward Sunex Cough Syrup come in?

It is supplied in a pack size of 120ml. 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 Sunward Sunex Cough Syrup 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 Sunward Sunex Cough Syrup?

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 Sunward Sunex Cough Syrup 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 Sunward Sunex Cough Syrup?

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 Sunward Sunex Cough Syrup 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 Sunward Sunex Cough Syrup 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.

Sunward Sunex Cough Syrup - Expectorant Cough & Phlegm Relief Malaysia

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Sunward Sunex Cough Syrup

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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 24, 2026

Overview

Sunward Sunex Cough Syrup contains Diphenhydramine Hydrochloride and is presented as a syrup. It is supplied in a pack size of 120ml.

It is classified as a non-prescription medicine, so no prescription is needed to order it. Under Malaysian rules for medicine information, this page carries product, safety and handling information only.

You can consult a doctor or pharmacist online on DoctorOnCall about this product before or after you order. Every order is checked by a registered pharmacist before it is delivered. Always read the label and the leaflet supplied with the pack.

Directions for Use

Shake the bottle well before use and measure the dose using the measuring cup or spoon provided rather than an ordinary household spoon. Take the syrup after meals to reduce the chance of stomach upset, and follow the dosing schedule printed on the product label or as advised by a pharmacist or doctor, without exceeding the recommended frequency within 24 hours.

Dosage

Dosage depends on age and the specific product strength, so always check the label or ask a pharmacist for the correct amount for adults, children, or the elderly. As a general guide for combination diphenhydramine-based cough syrups, adults typically take a measured dose every 4 to 6 hours as needed, children require a lower age- or weight-adjusted dose, and use in infants under 2 years should only be under medical advice.

Shelf Life

Sunward Sunex Cough Syrup is generally stable for up to 2 to 3 years from the date of manufacture when unopened and stored correctly. Always check the expiry date printed on the bottle and discard any syrup that is past its expiry date or has changed in colour, smell, or consistency after opening.

Storage Instructions

Store below 30°C in a cool, dry place away from direct sunlight and moisture, and keep the bottle tightly closed when not in use. Keep this medicine out of the sight and reach of children, and avoid storing it in the bathroom or near a sink where humidity is high.

Side Effects

Nausea or vomiting
Abdominal discomfort
Headache
Fatigue or weakness
Irritability or confusion (with high doses)
Metabolic acidosis (in rare or prolonged cases)

Contraindications

Known hypersensitivity to diphenhydramine, ammonium chloride, sodium citrate, or any other ingredient in the syrup
Severe liver or kidney impairment
Severe metabolic acidosis, where ammonium chloride should be avoided
Narrow-angle glaucoma
Difficulty urinating due to prostate enlargement or bladder outflow obstruction
Children under 2 years old unless directed by a doctor

Drug / Food Interactions

Other sedating antihistamines, sleeping tablets, or sedatives, which can increase drowsiness
Alcohol, which can intensify the sedative effect
Monoamine oxidase inhibitors (MAOIs), which may prolong and intensify antihistaminic effects
Other cough, cold, or allergy products containing similar antihistamines, to avoid duplicate dosing
Central nervous system depressants such as certain anxiety or pain medications

Quick Tips

Take the dose after meals to minimise stomach discomfort
Avoid driving or operating machinery until you know how the syrup affects you, as it may cause drowsiness
Drink plenty of water to help the expectorant action loosen mucus
Do not combine with other cough, cold, or antihistamine products without checking with a pharmacist
See a doctor if the cough lasts more than 7 days, worsens, or is accompanied by fever, breathlessness, or blood-stained phlegm

Ingredients / Active Ingredients

Ammonium Chloride

Diphenhydramine Hydrochloride
Ammonium Chloride
Sodium Citrate

Safety Advice

Pregnancy

Safe If Prescribed

This medicine should only be used during pregnancy if prescribed by a doctor after careful evaluation.

Breastfeeding

Use With Care

Use with caution. Monitor infant for potential adverse reactions.

Kidney

Not Advisable

Not generally recommended in patients with kidney disease.

Liver

Use With Care

Use cautiously. Liver function monitoring may be required.

Alcohol

Use With Care

Caution is advised when consuming alcohol with this medicine.

Driving

Use With Care

Use caution while driving until you know how this medicine affects you.

Relevant Information

Sunward Sunex Cough Syrup is intended for short-term relief of wet cough with phlegm and should not replace medical evaluation if the underlying cause of the cough is unclear. Customers in Malaysia and Singapore who are pregnant, breastfeeding, elderly, or have chronic liver, kidney, or heart conditions should consult a doctor or pharmacist before use, and parents should always check the age restriction on the label before giving this syrup to a child.