Sep 7, - These include painkillers, cough mixtures, Valium and other sedatives, Over-the-counter drugs such as painkillers and cough mixtures can be bought to procure as addicts need doctor's prescriptions in order to get these. Sep 19, - The glass counter in front of the pharmacist contains an even larger bounty. in practice merely superficial – one needs only money to buy them. of psychotropic drugs: Xanax, codeine, Valium, dihydrocodeine and Zolnox. Dec 17, - Over a few weeks, researchers bought Valium tablets, Mr Burnham said: "It's for the government now to order a review into whether the of GPs to tackle dependence on prescription and over-the-counter medicines.".