Are there any antihistamines that also function as norepinephrine reuptake inhibitors?
Reference
OpenAI's Answer
Yes, there is an antihistamine that also functions as a norepinephrine reuptake inhibitor: Chlorpheniramine. Chlorpheniramine not only serves as an antihistamine by blocking histamine receptors but also has some activity as a selective serotonin reuptake inhibitor (SSRI) with an inhibitory effect on norepinephrine neurons.
For further information, you can check out the PubMed article here.
Here are some images for a visual understanding of serotonin and norepinephrine reuptake inhibitors: