Anything that can cause sweating can lead to the cramps from hyponatraemia in particular -- I still get a few minutes of marked diaphoresis starting after the bang and rush with hydromorphone, oxymorphone, and hydromorphinol in particular, but most of the narcotics do it to one extent or another, and I try to avoid hyoscine and tincture of belladonna and the other strong anticholinergics as much as possible from May to September if I can. With taking narcotics and antihistamines on top of each other and catabolic steroids on occasion for exacerbations like neck pain and gout, and since I have naturally low blood pressure, the doctors have told me to count milligrammes of sodium to assure I get enough and a happy medium to keep the gout from getting worse, along with watching potassium, magnesium, calcium, strontium, iodine, chloride, bromide, phosphorus, and the like in particular as well as copper for some reason. It may be another part of bone building with calcium, strontium, phosphorus, and Vitamin D. Paracetamol also causes lots of sweating and is the main mechanism for its anti-pyretic effect, and aspirin and other Nsaids to lesser extents.
Did heat get this going by any chance? It is has been a bad summer for that in Austria and all over and I was in France the day last month it was 46°C further down south but it was plenty bad in Paris and Lyon as well and it really sucked . . . even being mainly nocturnal and having a 36°C normal body temperature which drops even further when the narcotics hit really didn't help . . . hot weather which does not cool down much at night, almost always because of such horrible things as 30°C+ dew points not just in the jungle or Red Sea/Persian Gulf but places like Paris, Frankfurt am Main, Prague, Toronto, Chicago, Minneapolis, St Louis, Milwaukee &c, adds up over time, a big reason why heat waves kill hundreds, thousands, and tens of thousands of people in urban areas in particular. I think the worst natural disasters in the United States, Germany, Austria, Italy and elsewhere were actually heat waves from the middle 1930s or more recently . . . second in France after the 8. May 1902 eruption of Mt Pelée on Martinique with a nuée ardente which killed almost 35k people I think it was. I guess there was a pretty bad week in Chicago and much of North America in July, but not as bad as 1995 at least.
Heat really sucks -- I would prefer -50°C every single day for that reason and that is a lot better than just below freezing because that is what causes the messes with ice, sleet, ice pellets, granular snow, slush, black ice and the like . . . well, nostalgia too because it was a day like that when my really hot and sophisticated boss jumped my bones for the first time back in the day . . . her feet almost froze on the way to work and I was helping her warm them up and one thing led to another, sort of like that joke about the two fire fighters buttfucking under a blanket. The coldest day of the XX. Century in the locale I think it was.