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National Drug Formulary

RHINATHIOL PROMETHAZINE SYRUP [SIN02613P]

Active ingredients: CARBOCISTEINE | PROMETHAZINE HCL

View product's general information
Last updated on 9 October 2026

Product Info

RHINATHIOL PROMETHAZINE SYRUP

[SIN02613P]

Product information

Active Ingredient and Strength

CARBOCISTEINE - 2 G/100 ML
PROMETHAZINE HCL - 0.05 G/100 ML

Dosage Form

SYRUP

Manufacturer and Country

UNITHER LIQUID MANUFACTURING - FRANCE

Registration Number

SIN02613P

Licence Holder

OPELLA HEALTHCARE SINGAPORE PTE. LTD.

Forensic Classification

PHARMACY ONLY MEDICINES

Anatomical Therapeutic Chemical (ATC) code

R06AD52

Prescription-only Medicines with Exemptions for Supply without Prescription

NA

Indication

1. What Rhinathiol Promethazine Syrup is and what it is used for
This drug contains promethazine (an antihistamine) and carbocisteine.
It is recommended for the alleviation of unproductive and irritative coughs in adults and children aged 6 years and above, particularly when coughing occurs at night.

Dosing

3. How to take Rhinathiol Promethazine Syrup
Dosage and administration
This drug is contraindicated in children less than two years of age.

Dosage
This medicine is for adults and children aged 6 years and above.

Adults
15 ml three to four times a day.

Children
6–12 years of age: 7.5 ml to 12.5 ml three times a day.
12–15 years of age: 12.5 ml to 15 ml three times a day.

Mode or route of administration: oral route.

If an infant develops a cough, consult your doctor.

Wash the measuring-spoon after each use.

IF IN DOUBT, DO NOT HESITATE TO ASK YOUR DOCTOR’S OR PHARMACIST’S ADVICE. THIS DRUG HAS BEEN PRESCRIBED FOR YOU PERSONALLY IN A SPECIFIC SITUATION: IT MAY NOT BE SUITABLE FOR OTHER CASES. DO NOT ADVISE ANYONE ELSE TO TAKE IT.

Duration of treatment
Treatment must be short (a few days) and only be taken when coughing occurs.

If you take more Rhinathiol Promethazine Syrup than you should
In case of overdose or if you take an excessively high dose by mistake, consult a doctor or an emergency room immediately. An overdose of Rhinathiol Promethazine may cause convulsions (especially in children), impaired alertness and coma.

If you forget to take Rhinathiol Promethazine Syrup
Do not take a double dose to make up for the forgotten dose.

If you stop taking RHINATHIOL PROMETHAZINE, syrup:
Not applicable.

Contraindications

2. What you need to know before you take Rhinathiol Promethazine Syrup
If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicinal product.

Do not take Rhinathiol Promethazine Syrup

  • infants (under 2 years of age) due to the risk of worsening of bronchial congestion

  • children aged 2 to 5 years inclusive, due to risk of psychiatric and nervous system side effects.

  • if you are allergic to any of the active substances (promethazine, carbocisteine) or any of the other ingredients of this medicine listed in section Contents of the pack and other information – please refer to the Product Insert/Patient Information Leaflet published on HSA for the full drug information

  • if you have previously or recently experienced agranulocytosis (a major drop in the number of white blood cells in the blood)

  • if you have difficulty urinating due to prostate or other problems

  • if you are at risk of certain types of glaucoma (increased pressure inside the eye)

  • if you are breast-feeding

This medicine MUST NOT BE USED during pregnancy.

CHECK WITH YOUR DOCTOR OR PHARMACIST IF YOU ARE NOT SURE.