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. 2012 May 27;132(8):1153–1163. doi: 10.1007/s00402-012-1528-1

Table 2.

In-house classification of analgesic drugs

Factor 1
Non-opioids
NSAID
Factor 2
Non-opioids
Others
Factor 3
Opioids
Low potential
Factor 4
Opioids
High potential
Factor 6
Epidural
Application
Acetyl salicylic acid Paracetamol oral Paracetamol/codeine Oxycodone Clonidine/ropivacaine/sufentanil
Celecoxib Paracetamol parental Tramadol Pethidine
Diclofenac Metamizole Tilidine Piritramide
Ibuprofen
Etoricoxib

In-house classification of analgesic drugs representing epidural application and newer drugs, based on the Oxford table [37]. The factor indicates the multiplication factor for the administered dose. The sum of the calculated doses represents the total medication. For example: 800 mg ibuprofen factor 1 = 800 mg cumulative; paracetamol 1,000 mg (factor 2) + pethidine 50 mg (factor 4) = 800 + 2,000 + 200 = 3,000 mg cumulative