Route of Elimination: Potassium is a normal dietary constituent and, under steady-state conditions, the amount of potassium absorbed from the gastrointestinal tract is equal to the amount excreted in the urine. Potassium depletion will occur whenever the rate of potassium loss through renal excretion and/or loss from the gastrointestinal tract exceeds the rate of potassium intake.
IDENTIFICATION AND USE: Potassium chloride (KCl) consists of odorless white crystals or crystalline powder or white granular powder or colorless crystals, with a strong saline taste. It is not registered for current pesticide use in the U.S., but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses. KCl is used as prevention and treatment of potassium deficiency, e.g. when thiazide diuretics or corticosteroids are used in case of excessive vomiting or diarrhea, or diets poor in potassium; in the treatment of cumulative digitalis poisoning; and as a component of lethal injections. It is also used in the fertilizer industry as potash and in buffer solutions for photography. Potassium chloride has been identified as being used in hydraulic fracturing as a clay stabilizer. HUMAN EXPOSURE AND TOXICITY: KCl is an essential constituent of the body for intracellular osmotic pressure and buffering, cell permeability, acid-base balance, muscle contraction and nerve function. In humans, acute oral toxicity is rare because large single doses induce nausea and vomiting, and because KCl is rapidly excreted in the absence of any pre-existing kidney damage. Symptoms of acute poisoning after ingestion of potassium chloride are usually mild. KCl oral overdoses manifests in neuromuscular signs in the form of hyperkalemia, general muscular weakness and ascending paralysis, listlessness, vertigo, mental confusion, hypotension, acute cardiovascular changes with ECG abnormalities, and heart block. Gastrointestinal symptoms manifest as nausea, vomiting, paralytic ileus, and local mucosal necrosis, which may lead to perforation. There are several case reports of accidental iv or ip administrations of KCl. Symptoms of acute poisoning after parenteral administration are similar to symptoms after oral exposure but can appear more promptly and be more severe. A case report of a subcutaneous injection of KCl reports chemical burns and skin lesions. During routine spinal anesthesia, an injection of 15 mL of 15% KCl (30 mM) mixed with bupivacaine epidurally caused permanent parapalegia and an ampule of potassium chloride, instead of bupivacaine, was mistakenly opened and inadvertently administered intrathecally to a patient, resulting in pain, cramps, and death within 2.5 hours of injection. Usual therapeutic doses of potassium for oral solution-adults are 1.5-3 g/day to prevent depletion, and 3-7.5 g/day for replacement. A threshold concentration for skin irritancy of 60 % was seen when KCl in aqueous solution was in contact with skin of human volunteers. The threshold concentration when applied to broken skin was 5 %. Gastro-intestinal irritant effects in humans caused by KCl administrated orally have been reported at doses from about 31 mg/kg bw/day. One epidemiological investigation among potash miners disclosed no evidence of predisposition of underground miners to any of the diseases evaluated, including lung cancer. ANIMAL STUDIES: No evidence of treatment-related carcinogenicity was observed in rats administered up to 1820 mg KCl/kg body weight/day through the food in a 2 year study. A developmental study revealed no fetotoxic or teratogenic effects of KCl in doses up to 235 mg/kg/day (mice) and 310 mg/kg/day (rats). No gene mutations were reported in bacterial tests, with and without metabolic activation. However, high concentrations of KCl showed positive results in a range of genotoxic screening assays using mammalian cells in culture. The action of KCl in culture seems to be an indirect effect associated with an increased osmotic pressure and concentration. ECOTOXICITY STUDIES: In short-term acute toxicity tests with fish, daphnia and algae the following results were found (lowest test result values): Ictalurus punctulus 48hr-LC50 = 720 mg/L; Daphnia magna: 48h-LC50 = 177 mg/L; Nitzschia linearis: 120 h-EC50 = 1337 mg/L. A chronic reproductive test with the invertebrate Daphnia magna gave a LOEC of 101 mg/L. All the studies compiled on the acute and chronic aquatic toxicity were > 100 mg/L. Thus it is concluded that KCl is not hazardous to freshwater organisms.
来源:Hazardous Substances Data Bank (HSDB)
毒理性
毒性总结
以高钾食物或氯化钾的形式补充钾可能能够恢复正常的钾水平。
Supplemental potassium in the form of high potassium food or potassium chloride may be able to restore normal potassium levels.
来源:Toxin and Toxin Target Database (T3DB)
毒理性
致癌物分类
对人类不具有致癌性(未被国际癌症研究机构IARC列名)。
No indication of carcinogenicity to humans (not listed by IARC).
The administration of oral potassium salts to persons with normal excretory mechanisms for potassium rarely causes serious hyperkalemia. However, if excretory mechanisms are impaired, of if potassium is administered too rapidly intravenously, potentially fatal hyperkalemia can result. It is important to recognize that hyperkalemia is usually asymptomatic and may be manifested only by an increased serum potassium concentration (6.5-8.0 mEq/L) and characteristic electrocardiographic changes (peaking of T-waves, loss of P-wave, depression of S-T segment, and prolongation of the QT interval). Late manifestations include muscle paralysis and cardiovascular collapse from cardiac arrest (9-12 mEq/L).
◉ Summary of Use during Lactation:No data are available on cellulose and citric acid use during breastfeeding. However, the drug is not absorbed from the gastrointestinal tract, so it cannot enter the breastmilk. Cellulose and citric acid is acceptable to use during breastfeeding.
◉ Effects in Breastfed Infants:Relevant published information was not found as of the revision date.
◉ Effects on Lactation and Breastmilk:Relevant published information was not found as of the revision date.
来源:Drugs and Lactation Database (LactMed)
吸收、分配和排泄
吸收
钾是正常的饮食成分,在稳态条件下,从胃肠道吸收的钾的量等于尿液中排出的量。
Potassium is a normal dietary constituent and under steady-state conditions the amount of potassium absorbed from the gastrointestinal tract is equal to the amount excreted in the urine.
Potassium is a normal dietary constituent and, under steady-state conditions, the amount of potassium absorbed from the gastrointestinal tract is equal to the amount excreted in the urine. Potassium depletion will occur whenever the rate of potassium loss through renal excretion and/or loss from the gastrointestinal tract exceeds the rate of potassium intake.
来源:DrugBank
吸收、分配和排泄
在稳态下,尿液中持续排出的氯化钾和粪便中的排泄量等于每日摄入量。
At steady state continuous excretion of potassium chloride in the urine and faeces equals the daily intake.
来源:Hazardous Substances Data Bank (HSDB)
吸收、分配和排泄
口服和静脉注射的氯化钾在细胞外液和细胞内空间之间达到平衡。
Orally and intravenously administered potassium chloride reaches an equilibrium between the extracellular fluid and intracellular space.
来源:Hazardous Substances Data Bank (HSDB)
吸收、分配和排泄
几乎所有的口服氯化钾都会被吸收。摄入后的峰值水平和发生时间取决于所给予的制剂。
Almost all orally administered potassium chloride is absorbed. The peak level and its occurrence time after ingestion depend on the preparation administered.
The invention provides compounds of Formula (I) and Formula (II)
pharmaceutically acceptable salts, pro-drugs, biologically active metabolites, stereoisomers and isomers thereof wherein the variable are defined herein. The compounds of the invention are useful for treating immunological and oncological conditions.
Functionalized monomers for synthesis of rubbery polymers
申请人:——
公开号:US20040063884A1
公开(公告)日:2004-04-01
The present invention relates to a rubbery polymer which is comprised of repeat units that are derived from (1) at least one conjugated diolefin monomer, and (2) at least one functionalized monomer of the structural formula:
1
wherein the R′ groups in repeat units and in different repeat units can be the same or different and represent hydrogen atoms or alkyl groups containing from 1 to about 4 carbon atoms, wherein x represents an integer from 1 to about 10, and wherein the R groups in repeat units and in different repeat units can be the same or different and represent alkyl groups containing from 1 to about 10 carbon atoms or alkoxy groups containing from 1 to about 10 carbon atoms.
Certain benzofuran derivatives are useful in the treatment of certain ischemic or inflammatory conditions, as well as neuroinflammation, neurodegeneration or degenerative diseases in which mitochondrial dysfunction leads to tissue degeneration. They are also useful in the manufacture of pharmaceutical formulations for the treatment of such conditions.
A process for producing a quinazolin-4-one compound having the formula:
[wherein R
1
, R
2
, R
3
and R
4
each represents a group not participating in the below-mentioned reaction, and R
1
, R
2
, R
3
and R
4
can be combined together to form a ring] which comprises reacting an anthranilic acid derivative having the formula:
[wherein R
5
is a hydrogen atom or a hydrocarbyl group] with a formic acid derivative in the presence of an ammonium carboxylate.
The present invention relates to a method of and composition for reducing intraocular pressure. The method comprises administering to a patient requiring such reduction of intraocular pressure a therapeutically effective amount of 12(R)-hydroxy-eicosa-5,8,10,14-tetraenoic acid (12(R)-HETE). The method of the present invention is particularly useful in treatment of all types of glaucoma. The method is also useful in lowering intraocular pressure in preparation for eye surgery, particularly for the removal of cataracts.