Levonelle 1500 morning-after pill being held in a blister pack. Levonelle is the brand name of an emergency contraceptive pill, available on prescription and over the counter to prevent an unwanted pregnancy. Levonelle 1500 is given as a single pill. Previously, the dose was given as two pills taken 12 hours apart (Levonelle-2). This was changed to taking the two pills together, and then to this single, double-strength dose (also sold as Levonelle One Step). Levonelle-2 was discontinued from November 2005. The pill must be taken a maximum of three days after unprotected sex. It contains the synthetic hormone levonorgestrel, which disrupts various stages of ovulation, fertilisation and pregnancy. Levonelle is manufactured by Schering Healthcare.