What murders were committed with drugs in Agatha's novels?

List of poisons used in AC’s works

The great achievements of Hercules: Arsenic [Lerna Hydra]

After the funeral: Arsenic

Apartment Girl: Arsenic, LSD

The Mystery of Marple’s Apartment: Arsenic, Diarrhea Poison

Murder Witness: Arsenic, Aconitum

G Manor Mystery: Arsenic

Long Night: Cyanide

No survivors: chloral hydrate, potassium cyanide

Dead Remembering: potassium cyanide, gas

Belated revenge: carmon (a sedative), arsenic, hydrocyanic acid

Dentist murder: procaine

Murder Notice: A Narcotic

Humanity Record: Verona (a sleeping pill)

Marple Caribbean Mystery: A Tranquilizer

A lunch at H Manor: morphine

The mystery of Maple Xuyang Ridge: morphine

Murder in the foreign student dormitory: morphine

Heritage crisis: Morphine

Murder on the Cliff: Morphine

Suspicious clouds on the golf course: chloroform (anesthetic), morphine

Amy Mystery Forum The Strange Case of Cliff Villa : Cocaine

The Mysterious Case of Styles Manor: Strychnine (Strychnine)

The Mysterious Mr. Quinn: Strychnine [The Arrival of Mr. Quinn] , a newly developed poison gas [Helen's Face Beer Murder: Toxine

Tragedy in Three Acts: Nicotine

The Curious Case of Rye: Taxine (Taxine)

Curtain: Physostigmine, Galabutine

Death Grass: Hydrocyanic Acid [Blue Geranium], Foxglove [Death Grass]

Date of Death: Digitoxin

House of Freaks: Iselin (physostigmine), Digitoxin

Murder in the Alley: Trichoside [Rhodes Island Triangle] ]

It is not difficult to kill: concentrated corrosive acid

Mystery of the ancient tomb: oxalic acid

White Horse Hotel: thallium

"Date with Death" It’s just a stand-alone novel...