Answer
Only if specifically advised. Airtight coverings increase absorption and can encourage bacterial growth.
Sources for this answer
- Clobetasol propionate/neomycin sulphate/nystatin 0.5mg/5mg/100,000 IU/g Ointment — Current selected SmPCemc · Summary of Product Characteristics
- Clobetasol propionate/neomycin sulphate/nystatin 0.5 mg/5 mg/100,000 IU/g Cream — Current selected SmPCemc · Summary of Product Characteristics