"Alérgico" (English: "Allergic") is a song by Mexican singer Anahí released on October 19, 2010.

[6] The song is considered her most successful single from the album in Mexico, since reached number two on the main airplay chart,[7] as well the strong sales in digital marketplaces.

[3] The song is a pop ballad, co-written by herself and Ana Mónica Vélez Solano, and written and produced by Noel Schajris.

[1] It was released as a digital download through iTunes Store, in countries United States, Mexico, Spain, Japan, Netherlands, France, Italy, Germany and Montenegro.

Anahí confirmed on MTV Brasil that will be three music videos with three versions: Spanish, Portuguese and one in collaboration with Noel Schajris.