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Docusate - Docusate Side Effects

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Docusate, also known as docusate salts or dioctyl sulfosuccinate, is a laxative of the stool softener type used to treat constipation. It is considered a good choice in children who have hard feces. For constipation due to the use of opiates it may be used with a stimulant laxative. It may be taken by mouth or rectally. Usually it works in one to three days.

Side effects are uncommon. Rarely, there may be abdominal cramps or diarrhea. Long-term use may cause poor bowel function. Docusate is acceptable during pregnancy and breastfeeding. It works by allowing more water to be absorbed by the feces. It typically comes in the form of a sodium, calcium, or potassium salts.

It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system. It is available as a generic medication and is not very expensive. In the United States one hundred doses are about 14 USD. The sodium salt, dioctyl sodium sulfosuccinate, also is used as a food additive, emulsifier, dispersant, and wetting agent, among other uses.


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Medical use

Constipation

Docusate is used to treat constipation, and in painful anorectal conditions such as hemorrhoids and anal fissures, to help avoid straining during bowel movements.

Given orally, the effects usually are seen 1 to 3 days after the first dose. Given rectally, as an enema or suppository, a bowel movement usually occurs within 5 to 20 minutes.

The drug may be used in people who are receiving opioid medication, although prolonged use may cause irritation of the gastrointestinal tract. Data supporting its efficacy in treating chronic constipation are lacking.

The effectiveness of laxatives for constipation in those receiving palliative care is unclear, as it has not been sufficiently studied. The comparative effectiveness of different laxatives in this group also is unclear as of 2015.

Other

Docusate sodium, when used with ear syringing, may help with earwax removal.

Available forms

Docusate sodium may be given by mouth or rectally. It also is used as an emulsifier and dispersant in topical preparations. People taking oral docusate should drink plenty of water to irrigate the bowel, thereby increasing motility.


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Contraindications

Docusate is contraindicated in patients with appendicitis, acute abdomen, or ileus. It is not suitable for the treatment of chronic constipation, since its mode of action is as a symptom reliever, not a cure for any specific underlying cause.


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Side effects

Possible side effects are typically mild and include stomach pain, diarrhea, or cramping. Serious allergic reactions may occur with the drug. The most severe side effect of docusate, although very rare, is rectal bleeding.


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Interactions

Docusate should not be used in addition to mineral oil, as the emulsifier will result in mineral oil being absorbed rather than functioning as a lubricant for the bowel walls, possibly resulting in foreign body granulomas. The substance also might increase resorption of other drugs, for example, dantron (1,8-dihydroxyanthraquinone).


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Other uses

Dioctyl sodium sulfosuccinate is used as a surfactant in a wide range of applications, often under the name Aerosol-OT. It is unusual in that it is able to form microemulsions without the use of co-surfactants, and it has a rich variety of aqueous-phase behavior including multiple liquid crystalline phases.

  • Dioctyl sodium sulfosuccinate is a pesticide adjuvant, used popularly for crops of olives, almonds, wine grapes, corn, and oranges.
  • It is used as an excipient in the production of tablets (as a lubricant) and suspensions (as an emulsifier).
  • It is the most widely used surfactant in reverse micelle encapsulation studies.

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Chemistry

Solubility of dioctyl sodium sulfosuccinate in water is 1:70 (14 g/l) at 25 °C, increasing to 1:20 at 70 °C. Solubility is better in less polar solvents: 1:30 in ethanol, 1:1 in chloroform and diethylether, and practically unlimited in petroleum ether (25 °C). It also is highly soluble in glycerol, although this is a rather polar solvent.

The ester groups are easily cleaved under basic conditions, but are stable against acids.

Docusate salts include docusate calcium, docusate sodium, and docusate potassium.




Mechanism of action

Docusate does not stay in the gastrointestinal tract, but is absorbed into the bloodstream and excreted via the gallbladder after undergoing extensive metabolism.

The effect of docusate may not necessarily be all due to its surfactant properties. Perfusion studies suggest that docusate inhibits fluid absorption or stimulates secretion in the portion of the small intestine known as the jejunum.




Toxicity

Toxicity for different species varies widely, but dioctyl sulfosuccinate biodegrades quickly in soil and water, a typical finding being >90% in 12 to 17 days. In the atmosphere, it is predicted to be removed by a photochemical reaction with an estimated half-life of 18 hours.

Humans

Dioctyl sodium sulfosuccinate is a strong irritant for eyes and lungs, and also a skin irritant. Ingestion may cause the side effects described above, such as diarrhea, intestinal bloating, and occasionally cramping pains. Dioctyl sodium sulfosuccinate is not known to be carcinogenic, mutagenic, or teratogenic.

Marine species

Dioctyl sodium sulfosuccinate has been determined to be of low toxicity for crustaceans such as the hermit crab Clibanarius erythropus and the shrimp Crangon crangon. The median lethal dose (LD50) for these species is about 100 mg/l of a docusate-containing formulation after 48 hours of exposition, although the concentration of the formulation is not specified in the study.

Toxicity for molluscs varies widely, with 48-hour LD50 found between 5 mg/l for the common limpet and 100 mg/l for the common periwinkle. Various species of phytoplankton have an LD50 around 8 mg/l. All of these doses refer to a particular formulation (mentioned in the reference), not the pure chemical.

In a 2010 study, dioctyl sodium sulfosuccinate exhibited higher toxicity against bacteria (Vibrio fischeri, Anabaena sp.) and algae (Pseudokirchneriella subcapitata) than did a number of fluorinated surfactants (PFOS, PFOA, or PFBS). Measuring bioluminescence inhibition of the bacteria and growth inhibition of the algae, the ED50 were in the range of 43-75 mg/l. Combinations of the fluorinated compounds with dioctyl sodium sulfosuccinate showed mid to highly synergistic effects in most settings, meaning that such combinations are significantly more toxic than the individual substances.

Freshwater species

The substance is highly toxic for rainbow trout with a median lethal concentration (LC50) of 0.56 mg/l after 48 hours for the pure substance. It is only slightly to moderately toxic for rainbow trout fingerlings, and slightly toxic for harlequin rasboras (LC50 27 mg/l of a 60% formulation after 48 hours).




Society and culture

Brandnames

In the U.S., dioctyl sodium sulfosuccinate is available under multiple brand names: Aqualax, Calube, Colace, Colace Micro-Enema, Correctol Softgel Extra Gentle, DC-240, Dialose, Diocto, Dioctocal, Dioctosoftez, Dioctyn, Dionex, Doc-Q-Lace, Docu Soft, Docucal, Doculax, Docusoft S, DOK, DOS, Doss-Relief, DSS, Dulcolax - Stool Softener (not to be confused with another drug marketed under the Dulcolax brand, bisacodyl, which is a stimulant laxative), Ex-Lax Stool Softener, Fleet Sof-Lax, Genasoft, Kasof, Laxa-basic, Modane Soft, Octycine-100, Pedia-Lax, Preferred Plus Pharmacy Stool Softener, Regulax SS, Sulfalax Calcium, Sur-Q-Lax, Surfak Stool Softener, and Therevac-SB. Generic preparations are also available.

In the UK, dioctyl sodium sulfosuccinate is sold under the brand name Docusol (Typharm Ltd) and DulcoEase (Boehringer Ingelheim).

In Australia, dioctyl sodium sulfosuccinate is sold as Coloxyl and Coloxyl with senna.

In India, preparations include Laxatin by Alembic, Doslax by Raptakos Laboratories, Cellubril by AstraZeneca, and Laxicon.

Source of the article : Wikipedia



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