drug treatment of diarrhoea
DESCRIPTION
treatment of diarrhoeaTRANSCRIPT
Drug Treatment of
Diarrhoea
Dr. Jatin Dhanani
Principles of Mx
¨ Treatment of Dehydration ¨ Maintenance of nutrition¨ Drug therapy
Rehydration
Intravenous
¨ Fluid loss > 10% of BW¨ Dhaka fluid - Recommended
NaCl - 85mM = 5 gm
KCl - 13mM = 1 gm
NaHCO3- 48mM = 4 gm
(Na – 133mM, K – 13mM, Cl – 98mM, HCO3 – 48mM)¨ Ringer Lactate: Na – 130 mM, K – 4 mM, Cl – 109mM¨ Initial volume equal to 10% BW – in 2-4 hrs
Oral
In 1 L of water or 5D
Oral rehydration¨ Mild (5-7%BW) to moderate (7.5-10%BW)
fluid loss¨ Bases of oral rehydration…….
Intactness of Glucose-Na+ co-transporter ¨ General principle
– Should be iso-/hypotonic (200-310mOsm/L)– Glucose Molar ratio should be slight high(but
not >110mM)– K+ and bicarbonate/citrate should be enough
Oral Rehydration Sol.
¨ Na+ – 90 mM¨ K + – 20 mM¨ Cl- – 80 mM¨ Citrate – 10 mM¨ Glucose – 110 mM¨ Total osmolarity –
310 mOsm/L
New ORS
¨ Na – 75 mM¨ K – 20 mM¨ Cl – 65 mM¨ Citrate – 10 mM¨ Glucose – 75 mM¨ Total osmolarity –
245 mOsm/L
NaCl – 2.6 gmKCl -1.5 gmTrisod. Citrate – 2.9 gmGlucose – 13.5 gm
Home based ORSSuper ORS
Zinc in pediatric
¨ Non diarrheal use:– Postsurgical, postburn, post-trauma maintence
of hydration and nutrition – Heat stroke– From IV to enteral nutrition change over
¨ Reduce duration and severity of ac. Diarrhoea
¨ Continue Zn for 10-14 days prevent diarrhoea for next 2-4 months
¨ Zn – ORS are available
Maintenance of Nutrition
¨ Never fasting ¨ Feeding during dirrhoea increase digestive
enz. and cell proliferation in mucosa¨ Give simple food – breast milk, half buffalo
milk, boiled potato, rice, chicken soup, banana, sago, etc.
Drug Therapy
¨ Specific antimicrobial agents ¨ Probiotics¨ Drug for Inflammatory Bowel Diseases(IBD)¨ Nonspecific antidiarrhoeal drugs
Antimicrobial Agents
¨ Antimicrobials of no value in – – Irritable Bowel
Syndrome (IBS)– Coeliac disease– Tropical sprue – Pancreatic enz def.– Thyrotoxicosis– Viral inf. (rotavirus)– Some bacterial inf. (S.
enterobacterius, ETEC)
¨ Antimicrobials useful in severe cases only – – Travellers’ diarrhoea– EPEC– Shigella enteritis– Nontyphoid salmonella– Y. enterocolitica
¨ Routinely used – irrational
¨ Antimicrobials regularly used in– – Cholera– C. jejuni– C. defficile– Amoebiasis/giardiasis
Role of Probiotics in Diarrhoea¨ Live culture or lyophillised powder ¨ Bases of use: restore and maintain the
normal gut flora ¨ Organism commonly used –
– Lactobacillus sp., Bifidobacterium, S. faecalis, Enterococcus sp., yeast Saccharomyces boulardii
¨ Widely used in travellers’ diarrhoea, acute Infective diarrhoea, antibiotic associated diarrhoea
¨ Efficacy evidence is lacking
Nonspecific antidiarrhieal dugs
Absorbants and adsorbants
¨ Colloidal bulk forming agents – ispaghulla, carboxy methyl cellulose – absorbants – Absorb the water and swell – modify
consistency and frequency of stool¨ Adsorbants - Kaolin, pectin, attapulgite –
believed to adsorb the bacterial toxins and protect the gut mucosa
Adsorbants are banned in India
Antisecretory drugs¨ Racecadotril (thiorphan)
– Enkephalinase inhibitor – prevent hypersecretion by blocking δ receptor
– Use in ac. secretory diarrhoea¨ Others
5-ASA comp.Bismuth SubsalicylateAtropineOctreotideRacecadrotril
Anti motility drugs
¨ Opioid analogue¨ Acts through μ and δ receptors –
– prevent propulsive movement, increase absorption and decrease secretion: increase resistance to luminal transit and allow more time for absorption
¨ Codeine – Primary action peripheral in intestine and colon– Not use widely
CodeineDiphenoxylateLoperamide
¨ Diphenoxylate (2.5mg) + atropine (0.025mg)
– Similar to pethidine– Cross BBB – abuse liability (atropine prevents) – A/E – respiratory depression, paralytic ileus
and toxic megacolon in children – C/I in <6yr¨ Loperamide
– Major peripheral action – very less absorbed and can’t cross BBB – no abuse liability
– Inhibits secretion – direct acts on calmodulin– A/E – rashes, abd. pain, toxic megacolon and
paralytic ileus – C/I in < 4yrs– Dose: 4mg f/b 2 mg at each motion
¨ Role of antimotility drugs– Utility limited to
• Noninfective diarrhoea• Mild travellers’ diarrhoea• Idiopathic diarrhoea in AIDS• Chronic diarrhoea of IBS• Very mild IBD with urgency interfering with daily
work
Never use antimotility drugs in acute infective diarrhoea
Drug for Inflammatory Bowel Diseases
¨ 5-ASA compounds – Sulfasalazine, mesalazine, olsalazine,
balsalazine– M/A: 5-ASA have local antiinflammatory
action by inhibition of production of cytokine, PAF, TNFα, NFKB
– Also inhibits COX and LOX
Sulfasalazine = sulfapyridine + 5-ASA– Use for mild to moderate disease– Dose: Acute condi. – 3-4 gm/d and for
maintainance – 1.5-2 gm/d
5-ASA compounds CorticosteroidsImmunosuressants TNF α inhibitors
– A/E: • b/c of sulfapyridine – rashes, joint pain, fever,
hemolysis, blood dyscrasias• Others: headache, malaise, anemia, oligozoospermia,
infertility, folic acid def.
Mesalazine (mesalamine): a delayed release prep.– Less side effect – fever, leucopenia, headache,
nephrotoxicity– Dose: 2.5 gm
Olsalazine: two 5-ASA compound
Balsalazine: 5-ASA linked to 4-aminobenzoyl-B-alanine
¨ Corticosteroid– For moderately sever to very severe condition– For acute exacerbation of disease– Prednisolone (40-60mg/d) – effect starts
within 3-7 days and remission in 2-3 week – Hydrocortisone and methyl prednisolone for
IV inj in very severe condi. with extraintestinal symptoms
– Hydrocortisone enema for proctitis– Steroid use for short term therapy only– If not controlled – immunosupressants
¨ Immunosupressant – Azathioprine(6-MP), methotrexate, cyclosporine– Use in steroid dependent, steroid resistant,
relatively severe cases – Adverse effect should be weighed to the efficacy
¨ TNFα inhibitor– Infliximab, adalimumab– Use in severe and refractory cases.
Thank You