Rhinathiol Promethazine – Restriction of oral formulation use in children less than 6 years of age for safety reasons

A Dear Healthcare Professional Letter has been issued by Opella Healthcare Singapore Pte. Ltd. to inform healthcare professionals about restrictions in the use of Rhinathiol Promethazine oral formulation in children less than 6 years of age due to safety reasons. The product information has been updated to reflect these restrictions, with amendments made in the sections regarding indication, posology, undesirable effects and warnings/precautions. Healthcare professionals are advised to refer to the updated product information. Please refer to the letter for details.

Healthcare professional, Industry member, Therapeutic Products
Published:

Dear Healthcare Professional Letters

11 Feb 2026

Only abstracts of the Dear Healthcare Professional Letters (DHCPL) are provided on this website. Details of these letters can be found in the MOH Alert System, which is accessible via the Health Professionals Portal (HPP), a one-stop portal for all healthcare professionals in Singapore. Dentists, medical doctors and pharmacists may access HPP at https://hpp.moh.gov.sg and follow the procedures below to access the MOH Alert system.

Step 1: Select your profession under ‘For Healthcare Professionals’.

Step 2: Click on ‘Useful links’.

Step 3: Click on ‘MOH Alert’ and log in via Singpass.

Step 4: Click on ‘Drug Alerts’ or ‘Med Device Alerts’ to view the DHCPLs.