Answer
Yes. This matters particularly with alcohol dependence, liver disease, epilepsy, pregnancy, breastfeeding and interacting medicines.
Sources for this answer
- Covonia Catarrh Relief Formula / Natures Aid Herbal Catarrh Relief Formula — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.