Answer
No. Combining it with another sympathomimetic decongestant can increase cardiovascular and nervous-system adverse effects.
Sources for this answer
- Benadryl Allergy Relief Plus Decongestant Capsules — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.