My husband has a chronic cough which always comes with his irregular heartbeat. After he coughs, he has a really bad metallic taste in his mouth.
He takes a blood pressure medication, is this caused from the med's?
You mentioned your husband has an irregular heartbeat. Do you know what type of arrhythmia he has? Some premature ventricular contractions (PVCs) cause a tight feeling/tickle in the jugular that occasionally induces a cough.
The metallic taste may be a side-effect of the BP meds he takes. You/he should check the informational sheet for known side-effects that comes with the prescription. Or better yet, you should ask your pharmacist if coughing and/or metallic taste is a possible side effect of the meds your husband is taking.