Legal Drug (合法 ドラッグ, Gōhō Doraggu?) is a manga series by Clamp. The main artist in this serialization is Tsubaki Nekoi, formerly Mick Nekoi. It is published in Japan by Kadokawa Shoten and it is published in English by Tokyopop who have currently released 3 volumes as of 2005. The series is also known as Lawful Drugstore or Gouhou Drug in Japan.
The series was put on hold in 2003, as the magazine it was serialized in ceased its publication. It resumed serialization in November 2011 in Kadokawa's Young Ace Magazine under the new title, Drug and Drop (ドラッグ＆ドロップ?).
The four leading characters of Legal Drug appear in CLAMP in Wonderland 2, which is the first time Kakei and Saiga are seen animated; Kazahaya and Rikuo had been previously animated during a brief appearance in the xxxHolic anime, episode 6, and xxxHolic Kei episode 13.