The conditions are:
As extensive and explanatory as Goodman and Gilman's The Pharmacological Basis of Therapeutics, Twelfth Edition
With additional extensive and thoroughly explanatory information on drugs (e.g. flupirtine, piracetam, nefopam, etc.) that are used elsewhere in the developed/semi-developed (like Russia or China) world (e.g. European countries) but not in the US.
Additional information about the medically recognised (in some of the world at least) herbs cannabis sativa and hypericum perforatum (St. John's wort; recognised in Germany).
If there is no such book then the European (or a European, like for instance the British equivalent. So long as said equivalent comes in English) equivalent of Goodman and Gilman's will be accepted.