Which medication effectively eliminates lice infestations?

The medication that effectively eliminates lice infestations is a pediculicide. Pediculicides are specifically designed to target and eradicate lice, including both the adult insects and their eggs (nits). These medications typically contain insecticidal agents that disrupt the lice's biological functions, leading to their death.

Using a pediculicide is essential in managing lice infestations as they are formulated to penetrate and kill lice, which typical medications do not do. Other medication classes, such as analgesics, antidepressants, and antihypertensives, have distinct therapeutic purposes and do not possess the properties needed to treat lice. Analgesics are used to relieve pain, antidepressants are designed to manage mental health conditions, and antihypertensives assist in controlling blood pressure. Thus, for lice treatment, the use of a pediculicide is both effective and appropriate.