Butatong

Indications

• Treatment of Babesiosis in cattle
• Management of other protozoal infections in veterinary medicine

Dosage

Children: Refer to specific veterinary guidelines for dosing in young animals, as pediatric doses depend on age, weight, and species.

Adults: Refer to specific veterinary guidelines for dosing in adult animals, as dosage may vary based on species and condition.

Mechanism of action

Buparvaquone acts by inhibiting the mitochondrial electron transport chain in protozoa, interfering with their oxidative phosphorylation process. This inhibition leads to a decrease in ATP production, essential for the survival and replication of the protozoa.

Pharmacodynamics

Buparvaquone demonstrates selective toxicity towards protozoa due to its specific interaction with the mitochondrial respiratory chain. The drug exhibits a concentration-dependent effect, with higher concentrations leading to more significant inhibition of protozoal growth. Its efficacy is influenced by the metabolic activity of the target organism.

Pharmacokinetics

Buparvaquone is well-absorbed following oral administration, with peak plasma concentrations typically occurring within a few hours. It has a high volume of distribution and is extensively metabolized in the liver. The primary route of elimination is via feces, with a minor portion excreted in urine. The half-life of buparvaquone is variable, depending on the species and dosage form.

Pregnancy

The safety of buparvaquone in pregnancy has not been established. Caution is advised.

Breast-feeding

It is not known whether buparvaquone is excreted in human milk. Caution is advised.

Storage

Store at room temperature, away from light and moisture. Keep out of reach of children.

Formulations

• {'name': 'buparvaquone', 'molecular_formula': 'C21H26O3'}

Dosage

Children: Refer to the BNF for Children for appropriate dosing information in paediatric cases, especially in instances of overdose.

Adults: Refer to the BNF for specific dosing information based on clinical circumstances, particularly in cases of overdose.

Mechanism of action

Ethylene glycol is metabolized by alcohol dehydrogenase to glycoaldehyde, which is subsequently converted to glycolic, glyoxylic, and oxalic acids. These metabolites contribute to anion gap metabolic acidosis and are responsible for tissue injury through the formation of insoluble calcium oxalate crystals.

Pharmacodynamics

The toxicity of ethylene glycol arises from its metabolites, particularly glycolic and oxalic acids. These compounds induce metabolic acidosis, lead to renal failure through calcium oxalate crystal deposition in the kidneys, and can cause neurological impairment. The anion gap increases due to the accumulation of these acids, leading to complications such as cardiovascular instability and potential multi-organ failure.

Pharmacokinetics

Ethylene glycol is rapidly absorbed after oral ingestion. It undergoes first-pass metabolism primarily in the liver, where it is converted into its toxic metabolites. The elimination half-life of ethylene glycol varies but is generally prolonged in cases of renal impairment. Renal excretion of metabolites contributes to the duration of toxicity, necessitating prompt medical intervention in cases of overdose.

Adverse effects

• Metabolic acidosis
• Renal failure
• CNS depression
• Hypocalcemia
• Cardiovascular collapse
• Pulmonary edema

Precautions

• Use with caution in patients with renal impairment
• Monitor for signs of metabolic acidosis
• Evaluate electrolyte levels, particularly calcium

Pregnancy

There is limited data on the safety of ethylene glycol in pregnancy. It should only be used if clearly needed.

Breast-feeding

It is unknown if ethylene glycol is excreted in human milk. Caution is advised.

Storage

Store in a tightly closed container at room temperature, away from heat and moisture.

Formulations

• Liquid

Dosage

Children: Refer to specific guidelines or literature for appropriate dosing.

Adults: Refer to specific guidelines or literature for appropriate dosing.

Mechanism of action

Dimethylacetamide acts as a solvent and may facilitate various biochemical pathways, particularly in electron transfer processes involving cytochrome bo oxidase. It participates in the electron transfer from substrates such as succinate, NADH, D-lactate, glycerol-3-phosphate, proline, and pyruvate to cytochrome bo oxidase, thereby influencing cellular respiration and metabolism.

Pharmacodynamics

As a solvent, dimethylacetamide does not have a direct pharmacodynamic effect on biological systems but enhances the solubility and stability of various compounds. Its role in facilitating electron transfer may impact cellular energy production, although specific pharmacodynamic effects in humans are not well-documented.

Pharmacokinetics

The pharmacokinetics of dimethylacetamide are not extensively characterized in the literature. However, as a solvent, it is likely absorbed through the skin and mucous membranes, and it may undergo metabolism in the liver. Its effects in biological systems would depend on concentration and exposure duration.

Pregnancy

There is insufficient data on the safety of dimethylacetamide in pregnancy. Caution is advised when prescribing this medication to pregnant women.

Breast-feeding

Limited data on the excretion of dimethylacetamide in breast milk. Caution is recommended for nursing mothers.

Storage

Store in a cool, dry place away from light. Keep out of reach of children.

Formulations

• Dimethylacetamide solution

Indications

• Industrial solvent
• Chemical reaction medium
• Pharmaceutical formulation aid

Mechanism of action

N-methylpyrrolidone acts primarily as a polar aprotic solvent. It can solvate both polar and non-polar compounds, facilitating reactions and processes by enhancing the solubility of various substances. NMP does not ionize in solution, which allows it to stabilize intermediates during chemical reactions.

Pharmacodynamics

In pharmacodynamics, N-methylpyrrolidone exhibits properties that enhance the permeability of biological membranes, which can aid in the absorption of certain drugs. Its solvent characteristics support the dissolution and transportation of various pharmacological agents.

Pharmacokinetics

N-methylpyrrolidone is absorbed through the skin and mucous membranes, with a relatively low bioaccumulation potential. It is metabolized primarily in the liver, with metabolites excreted in urine. The half-life and specific metabolic pathways are not well defined, but it is known to undergo conjugation and oxidation processes.

Pregnancy

There is limited data on the use of N-methylpyrrolidone in pregnant women. It is advisable to avoid use during pregnancy unless the potential benefits justify the risks.

Breast-feeding

There is insufficient information regarding the excretion of N-methylpyrrolidone in human milk. Caution should be exercised when administering to breastfeeding women.

Storage

Store in a well-closed container at room temperature, away from light and moisture.

Indications

• Plant growth regulation
• Agricultural applications as a growth inhibitor

Dosage

Children: Not applicable.

Adults: Refer to the relevant agricultural guidelines for specific applications.

Mechanism of action

In an in vitro study, propylene acts as a plant growth inhibitor by inhibiting the oxidation of indole-3-acetic acid by peroxidase in the presence of superoxide anion radicals. This inhibition is linked to the activation of an iron complex (compound III) shuttle, which enhances the reaction rate between superoxide and peroxidase, ultimately affecting plant growth processes. Propylene is a less effective inhibitor compared to ethylene.

Pharmacodynamics

The pharmacodynamic effects of propylene are primarily observed in its role as a growth inhibitor in plants. By modulating the oxidation of phytohormones like indole-3-acetic acid, propylene can influence various growth responses in plants, potentially affecting processes such as cell elongation and division.

Pharmacokinetics

Information on the pharmacokinetics of propylene in humans is not well-documented, as its primary uses are industrial and agricultural. Its metabolism may be influenced by environmental factors, and its effects are primarily studied in the context of plant biology rather than human pharmacology.

Mechanism of action

Ethylene glycol is metabolized by alcohol dehydrogenase to glycoaldehyde, which is then metabolized to glycolic, glyoxylic, and oxalic acids. These acids, along with excess lactic acid are responsible for the anion gap metabolic acidosis. Oxalic acid readily precipitates with calcium to form insoluble calcium oxalate crystals. Tissue injury is caused by widespread deposition of oxalate crystals and the toxic effects of glycolic and glyoxylic acids.

Mechanism of action

In an in vitro study of the mechanism of action of ethylene as a plant growth inhibitor, the effects of ethylene and some of its analogs, including propylene, on the oxidation of indole-3-acetic acid were examined. Ethylene and its analogs inhibited the oxidation of indole-3-acetic acid by peroxidase under conditions where the iron complex (compound III, an oxy-ferrous complex of peroxidase) shuttle was activated. Inhibition occurred only in the presence of the superoxide anion radical 02(-). Spectral and kinetic data indicated that ethylene and its analogs enhanced the rate of reaction of 02(-) with peroxidase; ie, the iron complex (compound III) shuttle, resulting in the formation of compound III. Propylene was a less effective inhibitor than ethylene.