Is it ok / safe to use anti histamine ie 180mg fexofenadine while using gabapentin 4 chronic cough, ? i am suffering with rhinitis+use inhalor too

Probably: These are not generally listed as interacting negatively with each other. All possible interactions may not be listed. Give your health care provider a list of all medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.