TOXICOLOGY AND DRUG OF ABUSE Flashcards
study of substances toxic to the body
toxicology
dose that would be predicted to produce a toxic response in 50% of the population
TD50
dose that would predict death in 50% of the population
LD50
dose that would be predicted as affective or has a therapeutic benefit in 50% of the population
ED50
Common CNS depressants which may cause disorientation, euphoria, confusion, and may progress to unconsciousness, paralysis and even death
Alcohol
Most common abused drug; a CNS depressant which causes diuresis by inhibiting ADH
Ethanol (Grain Alcohol)
Antidote for chronic intoxication of ethanol
diazepam
preferred method for ethanol
enzymatic using alcohol dehydrogenase reagent
commonly used solvent and a contaminant of homemade liquors. Converted to formaldehyde, and formic acid in the liver by alcohol dehydrogenase
methanol (wood alcohol)
preferred method for methanol
GC-MS
Rapidly absorbed by the GIT and is metabolized by hepatic alcohol dehydrogenase to acetone
Isopropanol (rubbing alcohol)
what is the antidote and preferred method for isopropanol?
Activated charcoal and gas chromatography
common constituent of hydraulic fluid and antifreeze
ethylene glycol
- hplc as preferred method
Colorless, odorless, tasteless gas and a very toxic substance. Produced by incomplete combustion of carbon-containing substances such as gasoline engines, organic materials in fire and cigarette smokes
carbon monoxide
symptoms of alcohol intoxication begin when the concentration is?
> 0.05%
Can exist as a solid, gas, or in solution. Super toxic substance and death may occur less than an hour. It is a component of insecticides and rodenticides , and a common suicidal agent
cyanide
-odor of bitter almonds
Common of ant poisons, rodenticides, paints, and metal alloys. Common suicide, and heavy metal poisoning
arsenic
- “odor of garlic” breath
It inhibits sulfhydryl enzymes throughout the body and it crosses the placenta
arsenic
antidote for arsenic?
British anti-lewisite
It is utilized in electroplating and galvanizing. It is a significant environmental pollutant and a pigment in paints and plastics. Causes Itai-Itai Disease
Cadmium
Potent enzyme inhibitor by blocking the delta aminolevulinic acid (ALA) synthase, pyrimidine-5’ nucleotidase, and NA-K-dependent ATPase
Lead
Metals that can cross the placenta
Lead, arsenic, cadmium, mercury
Neurological symptoms may include: encephalopathy characterized by a cerebral edema and ischemia. Severe can lead to stupor, convulsions and coma
Lead
-with a characteristic of wrist drop or foot drop
Binds with sulfhydryl proteins. And inhibits catecholamine-0-methyltransferase
Mercury
Major toxic effect of elemental mercury
Pink disease (acrodynia) and erethism
Major toxic effect if alkyl mercury
Congenital Minimata Disease