If the label is accurate, that could be a pretty large dose of morphine, 4 grains=~260 mg. 20-30 mg is a "normal" oral dose for moderate to severe pain [https://www.mayoclinic.org/drugs-supplements/morphine-oral-route/proper-use/drg-20074216] and those are not weight based doses. As an antitussive, I would think far less would be required. Their recommended dose was one teaspoon (~43 mg at 4 GR/ounce) every 3-4 hours. I am not sure you would want to be doing too much uphill walking after a swig of that stuff. The cannabis might have helped you not puke your guts out. I don't even know what to say about the chloroform and antimony.