Answer
Testing depends on individual risk. ECG, electrolytes, blood count, liver tests and longer-term eye or metabolic monitoring may be appropriate.
Sources for this answer
- Promazine Hydrochloride 50mg/5ml Oral Syrup — Current selected SmPCemc · Summary of Product Characteristics
- UK GovernmentUK Government · Reputable Web
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.