Once you are able to get your hands of some Morning Glory seeds, than you can proceed with grinding them using for example a coffee grinder, or a blender. Once the seeds are reduced to very small powder, you canplace the pulverized seeds in an alcoholic beverage, but you have to keep them in there at least for 3 days, until the active components have been extracted and dissolved in the alcoholic drink.
The advantage with this technique is that fewer substances, which are responsible for nausea, are not extracted in the alcohol, therefore the nausea feelings will be incredibly reduced after drinking the extracts.
You can also try to boil off the alcohol, by gently heating up the liquid, in order to obtain a gelly substance, which contains all the juicy alkaloids of the seeds in very high concentrations.