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In page Laudanum:

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Opium tincture remains in the British Pharmacopoeia, where it is referred to as Tincture of Opium, B.P., Laudanum, Thebaic Tincture or Tinctura Thebaica, and "adjusted to contain 1% w/v of anhydrous morphine."[1] It is a Class A substance under the Misuse of Drugs Act of 1971. At least one manufacturer (Macfarlan Smith) still produces opium tincture in the UK as of 2011.[2] "Gee's Linctus" is also available from most UK pharmacies, especially independent stores. This contains "Opium Tincture", at 0.083 mL, per 5 mL.[citation needed]