[Gnumed-devel] gmdrugs changes

[Ian Haywood]

I would like to propose some small changes to gmdrugs:

- link_drug_indication links to drug_dosage. This is so different indications 
can be ascribed to different dosages and
 routes of a drug. I do not agree that other attributes (side-effects, 
interactions, etc.) should be dose-route
 specific.

- A new table (disease_code) to hold the ICD-10 and other coding systems. 
link_disease_interaction and
 link_dosage_indication have reference clauses to the code field on this table.

- a new formulation type: "kit" for heterogenous kits like Losec HP7 and 
Trifeme. This seems the best solution without complicating the structure for 
just a handful of products. The constituents are specified as a compound (even 
though
 they are physically separate tablets). The packing unit is 'days' of the 
course, so 7 for Losec HP7, 28 for the Pill, etc.

- package_size is normalised out. 

Ian

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