Do I need a prescription to buy CP Pharma Diphenhydramine Expectorant?

No. CP Pharma Diphenhydramine Expectorant is a non-prescription product and can be ordered without a prescription. It is still dispensed by a registered pharmacist on DoctorOnCall.

What does CP Pharma Diphenhydramine Expectorant contain?

CP Pharma Diphenhydramine Expectorant is a healthcare product 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 CP Pharma Diphenhydramine Expectorant 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 CP Pharma Diphenhydramine Expectorant 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 CP Pharma Diphenhydramine Expectorant?

Follow the instructions printed on the label and in the leaflet supplied with the pack, and do not exceed the stated amount or duration. Handling steps are set out in the Directions for Use section on this page.

Can I speak to a doctor or pharmacist about CP Pharma Diphenhydramine Expectorant 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 CP Pharma Diphenhydramine Expectorant?

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 CP Pharma Diphenhydramine Expectorant 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 CP Pharma Diphenhydramine Expectorant 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.

CP Pharma Diphenhydramine Expectorant syrup for cough, cold and phlegm relief | DoctorOnCall Malaysia

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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 18, 2026

Overview

CP Pharma Diphenhydramine Expectorant contains Diphenhydramine Hydrochloride and is presented as a healthcare product. 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 each use and measure the dose accurately using the measuring cup or spoon provided, rather than a household spoon. Take the syrup by mouth as directed on the product label or as advised by a pharmacist, and it may be taken with or after food if it causes mild stomach discomfort. Do not use for longer than 7 days without consulting a doctor or pharmacist, and seek medical advice if the cough worsens or is accompanied by high fever, chest pain, or breathing difficulty.

Dosage

Dosage depends on the age of the user and should follow the schedule printed on the product packaging or the instructions given by a pharmacist, with lower doses used for children and doses generally given at intervals through the day rather than continuously. The maximum recommended daily dose stated on the packaging should not be exceeded, and this product should not be given to very young children or infants unless specifically advised by a doctor.

Shelf Life

Check the expiry date printed on the bottle or carton before use and do not use the product after this date. Once opened, the syrup should generally be used within the period stated on the label, and any remaining syrup should be discarded once it is expired or has changed in colour, smell, or consistency.

Storage Instructions

Store below 30°C in a cool, dry place away from direct sunlight and moisture. Keep the bottle tightly closed when not in use, and store it out of the reach and sight of children. Do not freeze, and do not use the syrup if it appears cloudy, discoloured, or has an unusual odour.

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 or other antihistamines
Narrow-angle glaucoma
Symptomatic enlarged prostate or urinary retention
Severe asthma or other serious lower respiratory tract conditions
Newborns and premature infants
Use of a monoamine oxidase inhibitor (MAOI) within the past 14 days

Drug / Food Interactions

Avoid alcohol, as it increases drowsiness and sedation
Avoid combining with other sedating antihistamines or cold and flu products to prevent overdose
Use with caution alongside sleeping tablets, sedatives, or other central nervous system depressants
May increase the effects of other anticholinergic medicines, raising the risk of dry mouth or urinary retention
Caution advised with monoamine oxidase inhibitors (MAOIs)

Quick Tips

Shake the bottle well before every dose
Use the measuring cup or spoon provided for accurate dosing
Avoid alcohol and driving or operating machinery after taking this medicine due to possible drowsiness
Do not give to children younger than the age stated on the packaging without medical advice
Seek medical advice if cough persists beyond 7 days or is accompanied by fever, chest pain, or breathlessness
Keep out of reach of children at all times

Ingredients / Active Ingredients

Ammonium Chloride

Diphenhydramine Hydrochloride (active ingredient)
Standard pharmaceutical excipients typical of oral cough syrup formulations, including flavouring, sweetening, and preservative agents, as listed in full on the product packaging

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

Cough is usually a short-term symptom of a cold, flu, or mild airway irritation, but persistent, worsening, or blood-stained phlegm, high fever, or breathing difficulty should be assessed by a doctor rather than managed with over-the-counter cough syrup alone. Because diphenhydramine can cause drowsiness, it is often more suitable for use at night, and customers should avoid relying on it for long-term or repeated use without medical review.