"Love Is a Drug" is a song by former Westlife member Markus Feehily. It was released in the United Kingdom as a digital download on 19 April 2015 through Harmoney Entertainment. It was released as the lead single from his debut studio album Fire (2015). The song was written by Feehily, Steve Anderson and Tinashé Fazakerley, and produced by Mojam. It peaked at number 65 on the Irish Singles Chart and number 56 on the UK Singles Chart.

Markus Michael Patrick Feehily is an Irish singer. He is one of the two lead vocalists of the pop vocal group Westlife, along with Shane Filan. Westlife has released twelve albums, embarked on thirteen world tours and won several awards, becoming one of the most successful musical groups of all time. With 15 number one appearances, he is also the highest-charting LGBT performer on the UK Singles Chart.