"Apart from the above, the role of the 1,526 pharmacies which have programmes of this type is also fundamental. These pharmacies participate in some cases in dispensing methadone and in other cases in the needle and syringe exchange programmes.
"In any case, one must bear in mind regarding the aforementioned harm reduction programmes which take part in the prevention of drug-related emergencies and in reducing deaths that the users of these programmes may possibly have been provided with care through more than one of these facilities in 2010, it therefore not being possible to add up the total number of users."

Source

Government Delegation of National Plan on Drugs (Reitox National Focal Point for Spain), "2012 National Report (2011 Data) to the EMCDDA: Spain: New Development, Trends and in-depth information on selected issues" (Madrid, Spain: DGPNSD, Dec. 2012), p. 190.
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