There's evidence a drug used to control seizures and relieve pain may help with chronic cough.
Researchers in Australia recruited 62 patients with a cough lasting more than 2 months in a study of a drug called Gaba-pentin.
It's used to treat epilepsy and pain relief related to shingles.
Chronic cough patients who were on the medication for 8 weeks improved much more than patients given a placebo.
The improvements subsided after the medication was stopped.