Title: The dose makes the poison
Content:  "The dose makes the poison" (dosis sola facit venenum 'only the dose makes the poison') is an adage intended to indicate a basic principle of toxicology. It is credited to Paracelsus who expressed the classic toxicology maxim "All things are poison, and nothing is without poison; the dosage alone makes it so a thing is not a poison." This is often condensed to: "The dose makes the poison" or in Latin, "Sola dosis facit venenum". It means that a substance can produce the harmful effect associated with its toxic properties only if it reaches a susceptible biological system within the body in a high enough concentration (i.e., dose). The principle relies on the finding that all chemicals—even water and oxygen—can 
Title: Toxicology
Content:  translates as, "All things are poisonous and nothing is without poison; only the dose makes a thing not poisonous." This is often condensed to: "The dose makes the poison" or in Latin "Sola dosis facit venenum". Mathieu Orfila is also considered the modern father of toxicology, having given the subject its first formal treatment in 1813 in his Traité des poisons, also called Toxicologie générale. In 1850, Jean Stas became the first person to successfully isolate plant poisons from human tissue. This allowed him to identify the use of nicotine as a poison in the Bocarmé murder case, providing the evidence needed to convict the Belgian Count Hippolyte Visart de Bocarmé of killing his brother-in-law.
Title: Poison
Content:  The term "poison" is often used colloquially to describe any harmful substance—particularly corrosive substances, carcinogens, mutagens, teratogens and harmful pollutants, and to exaggerate the dangers of chemicals. Paracelsus (1493–1541), the father of toxicology, once wrote: "Everything is poison, there is poison in everything. Only the dose makes a thing not a poison" (see median lethal dose). The term "poison" is also used in a figurative sense: "His brother's presence poisoned the atmosphere at the party". The law defines "poison" more strictly. Substances not legally required to carry the label "poison" can also cause a medical condition of poisoning. Some poisons are also toxins, which is any 
Title: The Dose Makes the Poison
Content:  The Dose That Makes the Poison: A Plain Language Guide to Toxicology is a book originally written by M. Alice Ottoboni and published in 1984 by Vincente Books to help laypeople understand what she considered to be an unfounded fear of synthetic chemicals. A second edition was published in 1991 and a third, revised by Patricia Frank, was released in 2011.
Title: Paracelsus
Content:  Paracelsus extended his interest in chemistry and biology to what is now considered toxicology. He clearly expounded the concept of dose response in his Third Defence, where he stated that "Solely the dose determines that a thing is not a poison." (Sola dosis facit venenum "Only the dose makes the poison") This was used to defend his use of inorganic substances in medicine as outsiders frequently criticized Paracelsus's chemical agents as too toxic to be used as therapeutic agents. His belief that diseases locate in a specific organ was extended to inclusion of target organ toxicity; that is, there is a specific site in the body where a chemical will exert its greatest effect. Paracelsus also encouraged using experimental animals to study both beneficial and toxic chemical effects. Paracelsus was one of the first scientists to introduce chemistry to medicine. He advocated the use of inorganic 
Title: Lists of poisonings
Content: V.C. Andrews: Flowers in the Attic ; Alexandre Dumas, père: The Count of Monte Cristo and The Three Musketeers ; Gustave Flaubert: Madame Bovary ; Kaori Yuki: Count Cain (GodChild after vol. 5) Protagonist Cain Hargreaves is known as the Count/Earl of Poisons. He has quite a collection of poisons, and frequently solves murder cases, almost all of which involve poisons. ; Snow White ate a poisoned apple ; Mingo Swieter in Ricarda Huch's 1917 novel, The Deruga Case (curare) ; Baron Vladimir Harkonnen in Dune by Frank Herbert ; Unsuccessful poisoning of Ron Weasley in Harry Potter and the Half-Blood Prince. The intended victim was Albus Dumbledore. ; David Eddings sagas: In the Belgariad, the Nyissan people poison each other on a regular basis; some work as professional poisoners. ; Isaac Asimov: "Obituary", "Sucker Bait", "The Winnowing" 
Title: Poison (perfume)
Content:  Poison is a perfume for women introduced by Parfums Christian Dior in 1985. The popularity of the scent made it become a brand in its own right and resulted in the subsequent release of five flanker fragrances: Tender Poison, Hypnotic Poison, Pure Poison, Midnight Poison, and Poison Girl.
Title: Hormesis
Content:  Hormesis has a trace origin rooted in a quote by Paracelsus who said, "All things are poison, and nothing is without poison; the dosage alone makes it so a thing is not a poison." German pharmacologist Hugo Schulz first described such a phenomenon in 1888 following his own observations that the growth of yeast could be stimulated by small doses of poisons. This was coupled with the work of German physician Rudolph Arndt, who studied animals given low doses of drugs, eventually giving rise to the Arndt-Schulz rule. Arndt's advocacy of homeopathy contributed to the rule's diminished credibility in the 1920s and 1930s. The term "hormesis" was coined and used for the first time in a scientific paper by Chester M. Southam and J. Ehrlich in 1943 in the journal Phytopathology, volume 33, pp. 517–541. Recently, Edward Calabrese revived the concept of hormesis. Over 600 substances show a U-shaped dose–response relationship; Calabrese and Baldwin wrote: "One percent (195 out of 20,285) of the published articles contained 668 dose-response relationships that met the entry criteria [of a U-shaped response indicative of hormesis]"
Title: List of drugs by year of discovery
Content:  Paracelsus expounded the concept of dose response in his Third Defense, where he stated that "Solely the dose determines that a thing is not a poison." This was used to defend his use of inorganic substances in medicine as outsiders frequently criticized Paracelsus' chemical agents as too toxic to be used as therapeutic agents. Paracelsus discovered that the alkaloids in opium are far more soluble in alcohol than water. Having experimented with various opium concoctions, Paracelsus came across a specific tincture of opium that was of considerable use in reducing pain. He called this preparation laudanum. For over a thousand years South American indigenous peoples have chewed Erythroxylon coca leaves, which contain alkaloids such as cocaine. Coca leaf remains have been found with ancient Peruvian mummies. There is also evidence coca leaves were used as an anesthetic. In 1569, Spanish botanist Nicolás Monardes described the indigenous peoples' practice of chewing a mixture of tobacco and coca leaves to induce "great contentment". 1400s Nicotine (Tobacco)
Title: Toxicology
Content:   Dioscorides, a Greek physician in the court of the Roman emperor Nero, made the first attempt to classify plants according to their toxic and therapeutic effect. Ibn Wahshiyya wrote the Book on Poisons in the 9th or 10th century. This was followed up in 1360 by Khagendra Mani Darpana. Theophrastus Phillipus Auroleus Bombastus von Hohenheim (1493–1541) (also referred to as Paracelsus, from his belief that his studies were above or beyond the work of Celsus – a Roman physician from the first century) is considered "the father" of toxicology. He is credited with the classic toxicology maxim, "Alle Dinge sind Gift und nichts ist ohne Gift; allein die Dosis macht, dass ein Ding kein Gift ist." 

Question: who said the poison is in the dose?
Answer: credited to Paracelsus.
Paracelsus.