Poison and toxicity with

The kanji 毒 means poison or something harmful in a concentrated way. It also covers figurative harm such as cruel words or corrosive influence.

Toxic Effects

(Poisoning)

中毒(ちゅうどく) means poisoning, intoxication, or addiction to a substance or activity.

It combines 中 (inside) with 毒 (poison) to show poison taking effect within.

Manga panel from ご注文はうさぎですか? showing example of Receiving a treating as with 〜れる.
ご注文はうさぎですか? » Volume 1 » Page 5

Cocoa wonders why it is that she didn’t like coffee before, but she’s crazy about the coffee Chino makes.

チノ:
「でもココアさんは味(あじ)の違(ちが)いわからないじゃないですか」
“But you don't know the difference in taste, right?”
「ただのカフェイン中毒(ちゅうどく)ですよ」
“That makes it just a caffine addiction.”
ココア:
「中毒(ちゅうどく)扱(あつか)いされた…」
“I got treated like an addict...”
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Toxic Substances

(Poison)

毒(どく) means poison. It also describes anything harmful, including a corrupting influence or malicious words.

Manga panel from 名探偵コナン showing example of Indiscriminate murder would be one thing if with 〜ならともかく.
名探偵コナン » Volume 5 » Page 110

Sonoko is invited to a band’s after party. During the get-together, the band’s singer Tatsuya eats a rice ball only to collapse and die. The police are called in, and Inspector Megure discovers the victim was poisoned. He accuses the man who prepared the food, but Conan bites into a rice ball to show it’s safe. The victim’s manager, Mari, agrees.

麻理(まり):
「無差別(むさべつ)殺人(さつじん)ならともかく、たまたま達也(たつや)が食(た)べたオニギリだけに、あらかじめ毒(どく)を仕込(しこ)むのは不可能(ふかのう)じゃありません?」
“If it were indiscriminate murder, that's one thing but since it was just the rice ball Tatsuya happened to eat, wouldn't it be impossible to poison it beforehand?”
目暮(めぐれ):
「た、確(たし)かにそうだが…」
“Th-that's true.”
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(Poisonous substance)

毒物(どくぶつ) means a poisonous substance that can damage health or cause death.

It combines 毒 (poison) with 物 (thing) to show a poisonous thing.

Manga panel from 名探偵コナン showing example of Determining the cause of death with 解剖.
名探偵コナン » Volume 16 » Page 25

Inspector Megure suggests the murder suspect committed suicide by drowning himself. The medical examiner disagrees.

監察医(かんさつい):
「ですが死因(しいん)は溺死(できし)ではありません…」
“However, drowning wasn't the cause of death...”
目暮(めぐれ):
「え?」
“What?”
監察医(かんさつい):
「解剖(かいぼう)してみないと断定(だんてい)できませんが… おそらく毒物(どくぶつ)を飲(の)んだあと池(いけ)に入(はい)ったものと…」
“I can't say for certain without an autopsy... but it's likely he took poison and then entered the pond...”
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