Wonder Drug
Miracle Cure
noun
A strange drug that seems too good to be true? Sometimes they're not bad. They are known as wonder drugs.
みょうやく
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
これは二日酔いに良く効く妙薬です。
This a really effective miracle cure for hangovers.