overdose; excessive dose
Typically used in medical or pharmacological contexts for taking too much of a drug or medicine.
睡眠薬の過量摂取で救急搬送された。
He was rushed to the hospital due to an overdose of sleeping pills.
過量のビタミン剤は体に害を及ぼすことがある。
Excessive doses of vitamin supplements can be harmful to the body.
drug overdose
Compound of 過 (exceed) and 量 (amount). The reading かりょう is the standard on'yomi for both characters.