Answer
Yes. Mercaptamine is another name for cysteamine; the selected capsules contain it as mercaptamine bitartrate.
Sources for this answer
- Cystagon 50 mg hard capsules — Current selected SmPCemc · Summary of Product Characteristics
- PROCYSBI 25 mg & 75 mg gastro-resistant hard capsules — 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.