 There are in fact cases reported, in which victims of a weever sting were still affected by it after a period of 4 months, even if this seems to be a rare scenario.The pain can in some cases reach up to a 10/10 on the numeric rating scale.In a reported case from 1782, a fisherman who had been stung, amputated his own finger to relieve the pain.⁠⁠
Even if there are reported cases of fatal accidents with "T. draco", it is widely believed that those are due to secondary infections and sepsis rather than to the toxin itself.⁠

There are as many recommended treatments for a sting of the greater weever as there are fishermen who were stung by them.