text: Dover's powder was a traditional medicine against cold and fever developed by Thomas Dover. It is no longer in use in modern medicine, but may have been in use at least through the 1960s.
  A 1958 source describes Dover's Powder as follows:
  "Powder of Ipecacuanha and Opium (B.P., Egyp. P., Ind. P.).  Pulv. Ipecac. et Opii; Ipecac and Opium Powder (U.S.N.F.); Dovers Powder; Compound Ipecacuanha Powder.  Prepared ipecacuanha, 10 g., powdered opium 10 g., lactose 80 g.  It contains 1% of anhydrous morphine.  Dose: 320 to 640 mg. (5 to 10 grains).  Many foreign pharmacies include a similar powder, sometimes with potassium sulphate or with equal parts of potassium nitrate and potassium sulphate in place of lactose; max. single dose' 1 to 1.5 g. and max. in 24 hours 4 to 6 g."
  Named from Doctor Thomas Dover, an English physician of the eighteenth century who first prepared it, the powder was an old preparation of powder of ipecacuanha (which was formerly used to produce syrup of ipecac), opium in powder, and potassium sulfate. The powder was largely used in domestic practice to induce sweating, to defeat the advance of a "cold" and at the beginning of any attack of fever. It was also known by the name pulvis ipecacuanhae et opii.
  To obtain the greatest benefits from its use as a sudorific, it was recommended that copious drafts of some warm and harmless drink be ingested after the use of the powder.
  The following excerpt from a report penned by a Doctor Sharp, employed in the British naval service in the West Indies, in this case, in Trinidad, in 1818, illustrates its use. He writes :