The Swelling Solution is a potion which causes whatever it touches to swell in size; its three ingredients are bat spleens, dried nettles, and puffer-fish eyes, which are carefully combined over moderate heat.
It matched by its antagonist, Deflating Draught, and each of the two substances are often employed as cures for an excess of the other.
Rumours that Swelling Solution can be used as a kind of magical viagra remain unconfirmed.
Related Drugs: Deflating Draught, Hair Raising Potion, Mandrake Restorative Draught, Pepperup Potion, Polyjuice Potion & Skele-Gro.