Rhinathiol Promethazine Syrup

Customers ordering through DoctorOnCall are required to complete an online consultation so a doctor can confirm the syrup is appropriate, particularly regarding the patient’s age, before it is dispensed.

Shake the bottle well before each use, measure the dose using the measuring cup provided, and take with food or a meal to reduce the chance of stomach upset; because promethazine can cause drowsiness, avoid driving or operating machinery after taking a dose.

Dosing is individualised based on age and the doctor’s prescription; adults are typically prescribed a measured dose taken two to three times daily, while dosing in children requires careful medical assessment and is not recommended in very young children due to the risk of serious breathing problems associated with promethazine.

Rhinathiol Promethazine Syrup is generally stable for around 2 years when unopened; once opened, use within the timeframe stated on the label and always check the expiry date before use.

Store below 30°C in a dry place, protected from light, with the cap tightly closed between uses, and keep well out of the reach of children.

• Children under 2 years of age (risk of severe or fatal respiratory depression associated with promethazine)
• Known hypersensitivity to phenothiazine-type medicines
• Severe liver disease
• Narrow-angle glaucoma
• Epilepsy or seizure disorders (use with caution)
• Concurrent use of other sedating medicines without medical advice

• Alcohol and other central nervous system depressants (sleeping tablets, some antidepressants, opioid painkillers) can significantly increase drowsiness and sedation
• Monoamine oxidase inhibitors (MAOIs) may interact and should be discussed with a doctor
• Other anticholinergic medicines may add to side effects such as dry mouth and blurred vision

• Take with food to reduce stomach upset
• Avoid alcohol and other sedating medicines while using this syrup
• Do not drive or operate machinery if you feel drowsy after a dose
• Consider taking the evening dose closer to bedtime if drowsiness is helpful for a night-time cough
• See a doctor if the cough persists beyond a week, worsens, or is accompanied by fever or breathing difficulty

Because Rhinathiol Promethazine Syrup combines a sedating antihistamine with a mucolytic, doctor assessment before use helps ensure the correct dose for the patient’s age and confirms that the cough is not a symptom of a more serious underlying condition; medical follow-up is particularly important for children, the elderly, and anyone using other sedating medicines.