Endocrine Flashcards
What’s the target HBA1C for type 1 dm?
Below 48mmol/mol
Whats the target HBA1C for type 2 diabetes?
Below 48 if on diet, life style treatment or only on 1 non hypo antidiabetic med
Below 53 if on hype med or more than 2 antidiabetic drug
What should the blood glucose level be if driving?
Higher that 5mmol/l
If less than 4mmol/l, do not drive
Should check every 2hrs and before driving
What group of people’s HBA1C may be misleading measure of glycaemic control?
Pregnancy - reliable 1st trial but not after
Haemoglobinopathirs e. G. Sickle cell - produces false positive
Chronic renal failure - can cause anaemia and thus produce false positive
Anaemia
Increased red cell turnover
Alcoholism - can reduce HBA1C
Common adr of metformin?
GI side effect
Potential for b12 deficiency
What antidiabetic med is safe for breastfeeding?
Insulin
Metformin
Glibenclamide
What should you give if a preg lady cannot tolerate metformin and insulin is not enough?
If after 11wks (2nd and 3rd trimester) can give glibenclamide
Sick day rules on diabetes?
Keep taking insulin and diabetic meds (apart from SGLT2 bc it can increase risk of DKA)
May need more insulin cas illness can cause hyperglycaemia
Keep monitoring more often than usual (at least every 4hrs)
Monitor for ketones (esp type 1)
Drink plenty of fluids
Try to eat
What’s the insulin safety warning?
Overdose of insulin due to abbreviations or incorrect device
- the words unit or international units should not be abbreviated
- specific insulin administration devices should always be used to measure insulin like insulin syringes and pens
- never give IV syringe for SC injection as IV are in ml not units
Risk of severe harm and death due to withdrawing insulin from pen devices
What could increase insulin requirements?
Infection Stress Trauma - accidental, surgery Pregnancy (2nd and 3rd trimester) Puberty
What could decrease insulin requirements?
Physical activity Illness Reduced food Renal Organic causes Endocrine disorder e g. Addison disease, hypopituitarism Coeliac disease e. G. Gluten intolerance
How do you use insulin injection?
Hold it with a fist and push slowly and when it gets to 0, wait 10secs to allow insulin to spread
What is diabetes insipidus?
Where large amounts of dilute urine are produced which causes thirst
What’s the 2 types of diabetes insipidus?
Cranial where the hypothalamus does not make enough ADH
Nephrogenic where the kidneys do not respond to ADH
How do you treat diabetes insipidus?
Cranial = vasopressin or desmopressin
Desmopressin is more potent analogue than vaso with a longer duration and no vasoconstriction effects
Nephrogenic = thiazide diuretics
What is desmopressin and vasopressin used for?
Diabetes insipidu
Nocturnal enuresis
What’s the side effect of desmopressin and vasopressin?
Hyponareaemia
Hyppnatraemic convulsions
What does polyphagia, polydipsia mean?
Excessive hunger
Excessive thirst
Interaction between Ace inhibitors and antidiabetic meds Inc insulin?
Ace inhibitor potentiate hypoglycemic effects and antidiabetic drugs and insulin, esp in renal imapirment
Interaction between ACE inhibitor and insulin?
Hyperkalaemia
Hypoglycemic
Which drugs antagonise hypoglycemic effect of insulin?
Corricosteroids
Oral contraceptives
Loop/thiazide diuretics
When do you need to stop taking metformin?
If dehydrated e. G. From fever, vomiting, diarrhoea as increase risk of lactic acidosis
When should you consider stopping gliflozins?
If dehydrated as they can cause volume depletion
How do you store insulin?
Store in fridge between 2 to 8 degrees
Once opened, store at room temperature and use by 28 days
If left outside the fridge at 15 to 30 degrees more than 48brs, discard
If frozen, discard
How do you convert dose of beef insulin to human insulin?
Reduce dose by 10%
How do you covert dose from pork insulin to human insulin?
No dose change
How to manage pts on insulin treatment undergoing surgery?
Night before - usual insulin
Day of surgery - IV glucose with potassium (if not Hyperkalaemia) according to fluid requirements (lower in elderly, volume depleted pts and CV disease)
Or IV soluble insulin with NACL
Once pt start eating and drinking - SC before breakfast and stop IV 30mins later
When do you consider dual antidiabetic therapy in type 2 dm?
When HBA1C rises to 58mmol
When will you consider triple therapy or insulin therapy in type 2 dm?
If on dual therapy but still the HBA1C rises to 58mmol
What’s the short acting sulponylurea and its advantage?
Gliclazide
Tolbutamide
Lower risk of hypo so use in elderly and renal impairment
What’s the long acting sulponylurea?
Glibenclamide
Glimepiride
Which sulponylurea causes electrolyte imbalance and what electrolyte?
Glipizide and glimepiride causes hyponareaemia
What side effects does sulponylurea cause?
Hyponareaemia Hypoglycaemia Weight gain Jaundice Hypersensitivity reaction the first 6 to 8wks
Interaction between warfarin and sulponylurea?
Increased risk of Hypoglycaemia
Interaction between ACE inhibitor and sulponylurea?
Increased risk of Hypoglycaemia
Interaction between sulponylurea and NSAIDS?
Reduced renal excretion
What’s the NICE advise on treatment plan with pioglitazone (thiazolinedione)?
Continue if HBA1C is reduced by 0.5% within 6 months
Side effects of pioglitazone?
Heart failure - increased incidence when combined with insulin
C/I in history of hf
Bladder cancer - report haematuria, dysuria and urgency
Hepatotoxicity - stop if jaundice occurs
What’s the drug group of gliflozins? Canagliflozin, dapagliflozin, empagliflozin
SGLT2 inhibitors
Sodium glucose co-transporter 2
Side effects of SGLT2 inhibitors
Life threatening atypical DKA with only moderately raised blood glucose level
Volume depletion - report postural hypotension, dizziness
What’s the safety info regarding canagliflozin?
Increased risk of lower limb amputation - report skin ulceration, discolouration, new pain
- stay hydrated, foot care
Drug names of DPP4 inhibitors?
Linagliptim Saxagliptin Sitagliptin Alogliptin Vilagliptin
Side effects of DPP4 inhibitors?
Pancreatitis - report persistent, severe abdominal paim
Liver toxicity with vildagliptim - stop and report N and V, jaundice, dark urine
Drug names of meglitinides?
Nateglinide
Repaglinide
Side effects of metaglinide?
Hypersensitivity reaction
Nateglinide - abdominal pain, constipation, diarrhoea, n and v
Raoaglinide - visual disturbances
Patient advise on metaglinide
Particular care to avoid Hypoglycaemia as metaglinide stimulate insulin secretion
Take 30mins before main meal
When do you use acarbose?
Reserved for when other oral hypoglycemics cannot be taken
Side effects of acarbose?
Flatulence - improves with time and antacids do not help
Diarrhoea - withdraw or reduce dose
Pt counselling on acarbose?
Chew with fisrt mouthful of food or Swallow whole with little liquid immediately before food
Carry glucose to counteract hypo if happens
Drugs of GLP 1 agonist?
Glucacon like peptide 1 Exenatide Albiglutide Dulaglutide Liraglutide Lixisenatide
Advantages of using GLP1 agonists?
Prevents weight gain
SC injection available
Side effects of GLP1 agnosit?
Pancreatitis
Pt advise on GLP1 agonist?
Do not administer after a meal
If missed dose
Injecti within 1hr of next meal = lixisenatide
Continue with next schedule dose = Exenatide
Inject within 3 days of next weekly dose = Dulaglutide and albiglutide
Use contraception for Mr Exenatide continue 12wks after stopping, lixisenatide, Albiglutide
What’s the HBA1C target for diabetic pt at high risk of arterial disease?
Below 48mmol
What medications should an African diabetic pt receive?
Both an ACE inhibitor and a diuretic/CCB
What’s the normal cholesterol target and the target for high risk pt such as diabetic pt?
Normal below 5mmol
Diabetic below 4 mmol
How do you treat emergency Hypoglycaemia?
10 to 20g glucose/sucrose if necessary repeat after 10 to 15 mins Coke 100-200ml Lucozade original 55-100ml Sugar lumps 3-6 Sugar 2-4 tsp Ribena 19ml to be diluted
Whats advised against for treatment of Hypoglycaemia?
Avoid chocolate or biscuits as fats delay glucose absorption
Sulponylurea induced hypo is always treated in hospital bc it can persist for hours
If Hypoglycaemia unresponsive or unconscious, what should you do?
Give sc/IM glucagon
What to do if unresponsive to glucagon after 10mins or hypo prolonged?
IV glucose
Symptom of DKA?
Severe hyperglycaemia High blood ketones and ketonuria, keto breath (metallic taste in mouth) Pear drop breath Dehydration/excessive thirst = polyuria N&V anorexia Abdominal pain Difficulty breathing Electrolyte imbalance Mental confusion Drowsiness Diabetic coma Convulsions
What’s the safe info regarding SGLT2 inhibitors?
Risk of DKA
monitor ketones in blood during treatment interruption for surgical procedures or acute serious medical illness
Fournier’s gangrene (necrotising fasciitis of the genitalia or perineum) Patients should be advised to seek urgent medical attention if they experience severe pain, tenderness, erythema, or swelling in the genital
Side effects of SGLT2 inhibitors?
Balantis Back pain Dyslipidaemia Hyooglycaemia Polyuria
What’s the advantage of desmopressin over vasopressin?
More potent and has a longer duration of action than vasopressin
Unlike vasoprew, desmopressin has no vasoconstriction effect
How is desmopressin and vasopressin administered?
Given by mouth or intranasally
Injection if unconscious
How is desmopressin used for diagnosis of diabetes insipidus?
After administration, if the body is able to produce concectrate urine despite water deprivation, confirmation of cranial diabetes insipidus
If failure to respond, Nephrogenic diabetes insipidus
Unlicensed but what can be used for partial pituitary diabetes insipidus?
Carbamazepine
Vasopressin can also be used in.?
Nocturnal enuresis
Control variceal bleeding in portal hypertention
What can be used for the treatment of Hyponatraemia resulting from inappropriate secretion of antidiuretic hormone?
1st line is demeclocycline
Or
Tolvaptan
What happens if you correct Hyponatraemia rapidly?
Osmotic demyelination leading to serious neurological eventa
What’s the side effect of vasopressin?
Hyponatraemia esp for elderly and renal impairment
Drugs to avoid when using vasopressin?
Tricyclic antidepressants as they increase secretion of vasopressin
Intranasal desmopressin cannot be given for what indication?
Nocturnal enuresis as increased side effects
Desmopressin are contra indicated in preg bc?
Small oxytocic effect in third trimester
Increased risk of pre eclampsia