Aromatherapy Essential Oil Diffuser Humidifier plus NaturoBliss Peppermint Essential Oil has completely gotten rid of my post-nasal drip is caused me to cough incessantly at night. I had been suffering for years with this problem and this amazing oil diffuser and peppermint oil combo got rid of it in one day. pepeprmintoil postnasaldrip oildiffuser humidifier essentialoildiffuser pepermintessentialoil oildiffuserhumidifier LTKhome LTKunder50