aminosalicylates Flashcards

1
Q

side effects

A
  • Arthralgia
  • Cough
  • Diarrhoea
  • Dizziness
  • Fever
  • GI discomfort
  • Headache
  • Leucopenia
  • Nausea, vomiting
  • Skin reactions
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2
Q

name the AS

A
  • balsalazide
  • mesalazine
  • sulfasalazine
  • olsalazine
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3
Q

What to do if there is a suspicion of a blood dyscrasia

A

stop drug immediately and perform blood count

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4
Q

counsel patients to report any…

A

unexplained bleeding, bruising, sore throat, fever, malaise that occurs during treatment

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5
Q

Use in breastfeeding

A
  • monitor breastfed infants for diarrhoea
  • sulfasalazine: small amounts in milk (one report of bloody diarrhoea) and theoretical risk of neonatal haemolytic esp in G6PD-deficient infants
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6
Q

Use in pregnancy

A
  • avoid unless benefit outweighs risk
  • sulfasalazine: risk of neonatal haemolysis in 3rd trimester, ensure adequate folate supplementation is given to mother
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7
Q

hypersensitivity

A

contraindicated

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8
Q

monitoring for all AS

A
  • Renal function before starting, 3 months, then annually
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9
Q

mesalazine and lactulose

A
  • preparations that lower stool pH (e.g. lactulose) might prevent the realise of some GR and MR forms of mesalazine
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10
Q

symptoms of acute intolerant syndrome - mesalazine

A
  • discontinue immediately if symptoms occur such as abdominal pain, fever, severe headache, rash
  • worsening abdominal pain and diarrhoea may be difficult to distinguish from an exacerbation of UC
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11
Q

brands: mesalazine

A

Asacol, salofalk, pentasa

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12
Q

How to take pentasa granules

A

place on tongue and ash down with water or orange juice w/o chewing

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13
Q

how to take salofalk granules

A

place on tongue and wash down with water w/o chewing

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14
Q

Mesalazine - brand switches

A

report any changes in symptoms

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15
Q

mesalazine interactions

A
  • increased nephrotoxicity with other nephrotoxic drugs e.g. acyclovir, amphotericin B, aspirin, cefalexin, ceftriaxone, Cs, ACEi, NSAIDs, gentamicin, lithium, MTX, vancomycin etc
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16
Q

mesalazine GR tabs label

A

do not take indigestion remedies 2 hours before or after

17
Q

sulfasalazine cautions

A
  • acute porphyria’s
  • G6PD deficiency
  • Hx asthma or Hx allergy
  • maintain adequate fluid intake
  • risk haemotological toxicity
  • risk hepatic toxicity
  • slow acetylator status
18
Q

when do haematological abnormalities tend to happen with sulfasalazine

A
  • usually in first 3-6 months of treatment
  • discontinue if they occur
19
Q

monitoring for sulfasalazine

A
  • renal before starting, 3 months, annually (like all AS)
  • FBC (incl differential WCC and platelet count), initially and then monthly for first 3 months
  • LFTs monthly for first 3 months
20
Q

which AS stains fluids, what colour, and what to counsel pt?

A
  • sulfasalazine stains bodily fluid yellow-orange
  • harmless
  • soft contact lenses may be stained
21
Q

sulfasalazine interactions

A
  • nephrotoxic drugs (e.g. acyclovir, amphotericin B, aspirin, ceftriaxone, cefalexin, MTX, lithium, NSAIDs, ACEi)
  • increased risk of myelosupporession (mabs, azathioprine, -tinibs, carboplatin, cisplatin, anti-cancer drugs, doxorubicin, paclitaxel, vinblastine, vincristine)
22
Q

labels for GR tabs

A

do not take indigestion remedies 2 h before or after

23
Q

common SE sulfasalazine

A
  • insomnia
  • stomatitis
  • taste altered
  • tinnitis
  • urine abnormalities
24
Q

how to remember which one has important info about intolerance and lactulose

A

MILK

mesalazine
intolerance (acute intolerance syndrome - severe headache, rash, abdominal pain, fever - discontinue!!!)
lactulose (GR MR forms may be prevented from being released due to low stool pH)

25
Q

what is a CI for mesalazine

A

Blood clotting abnormalities

26
Q

patient comes in asking for some advice. they want to buy some painkillers are are ok to take with their medicines - Asacol 800mg MR tablets.

Their symptoms include fever, bad stomach pain, headache, and a rash.

A

Tell them to discontinue immediately and refer to GP bc they are displaying signs of acute intolerant syndrome (fever, rash, severe headache, severe abdominal pain)

As for painkillers, it’s best to avoid NSASIDs because they are nephrotoxic. Paracetamol is ok