I have had this everlasting cough, since Christmas, luckily it is now nearly gone. During a bad bout, and wanting to get some sleep, I took a swig of my husband's, prescribed, Pholcodine. I didn't read the blurb, (Iknow, I know), anyway during the night I was woken by my heart going lickety split, with palpitations that would not subside. I ended up with the paramedics and a short visit to hospital. I was asked if I had done anything different, and taking the pholcodine was the only thing I could think of. I do take blood pressure tablets, so it is my own fault for not reading the warnings that are printed on the leaflet. I have hopefully learned my lesson, so please beware when taking these meds that can be bought over the counter.