What is the ruling on selling liver medication, obtained for a small sum (through begging) in Italy, knowing that the husband is ill and currently unemployed, with the aim of raising money for his treatment?

If the intention is that the husband works in Italy and obtains medicine at a cheap price, then if it is stipulated, either explicitly or by custom, that his right to the medicine is limited to the extent of his personal need, it is not permissible for him to purchase an excess quantity for sale; due to the obligation to respect the condition of the giver.