DM treatment Flashcards
fasting plasma glucose OR
after 8hours of fasting
> or equal to 7.0 mmol/l 126 mg/dL
Diabetes mellitus is defined as
elevated blood glucose
absent or inadequate pancreatic insulin secretion
without concurrent impairment of insulin action
2 hour plasma glucose
75 g oral glucose load
> or equal to 11.1 mmol/l (200 mg/dl)
uncommon criteria in WHO DM
elevated RBS
glycosylated hemoglobin
signs and symptoms of DM
polyphagia polyuria polydipsia blurred vision fatigue nausea dry skin
type 1 insulin dependent diabetes hallmark
selective Beta cell destruction
absolute insulin deficiency
type 2 noninsulin dependent diabetes hallmark
insulin resistance
relative insulin deficiency
fist diagnosis of gestational DM
during pregnancy
progresses to frank diabetes
interruption of insulin replacement therapy in type 1 DM can result to
diabetic ketoacidosis
type 2 DM dehydration can lead to
hyperketotic hyperosmolar coma
increases in response to different stimuli especially glucose
INSULIN
variability of insulin absorption is more prominent with
regular human insulin and NPH insulin
half life of insulin
3-5 minutes
endogenous insulin is secreted more by
liver 60%
exogenous insulin is excreted more by the
kidney. 60%
insulin binds with
alpha sub TKR
basal insulin value
5-15 uu/mL (30-90 pmol/l)
peak insulin value
60-90 uu/ml (369-540 pmol/l)
human sources of insulin made from
recombinant DNA
pork or beef insulin can cause
hyoersensitivity
not produced anymore
different concentrations of insulin prep
u-100
u-500
u-40
only concentration of insulin available in the Philippines
u-100
concentration used in other countries for insulin resistance
u-500
used in other countries for pedia DM
u-49
basis of classification of insulin preparations
time of onset
duration of action
for basal requirements use
intermediate or long acting insulin
postprandial hyperglycemia use
short acting or rapid acting insulin before meals
only cloudy suspension among preparations
NPH
only insulin preparation that can be mixed with other preparations
NPH
mixing how to
clear soln must be injected to the cloudy suspension
route of general prep
SC
preferable regular insulin route
IV
pH of almost all insulin prep
neutral
only prep that is acidic of pH. 4 and cant be mixed with other insulin
GLARGINE
types used in continuous SC insulin infusion
rapid acting- LISPRO, ASPART, GLULISINE
short acting- regular INSULIN
cant be mixed with other solutions
GLARGINE (Lantus)
DETEMIR (Levemir)
traditional and chepest way to administer INSULIN
vial
tuberculin syringe injection
mode of delivery for whose blood glucose fluctuate and is difficult to monitor and control
INSULIN pump
good range of blood glucose reading
80-120 fasting blood glucose early in the morning
140-180 after a meal
proline is moved from b28 to b29
lysine is moved from b29 to b28 making it faster acting
LISPRO (humalog)
b28 prolone substituted with a negatively charged aspartic acid
ASPART (novolog)
glycine substitutes aspargine at the end of alpha chain
2 arginines are added to the end of the b chain
GLARGINE (lantus)
myristic acid is added to the alpha chain
threonin is removed from the end of beta chain
DETERMIR (levemir)
lysine at b3 instead of aspargine
glutamic acid at b29 instead of lysine
GLULISINE (apidra)
rapid acting insulin
LISPRO (humalog)
ASPART (novolog)
GLULISINE (apidra)
used for postprandial hyperglycemia
rapid acting
- LISPRO
- ASPART
- GLULISINE
most physiologic insulin prep
rapid acting
- LISPRO
- ASPART
- GLULISINE
onset of action of rapid acting -LISPRO -ASPART -GLULISINE
15 mins, not dose related
duration of action of rapid acting -LISPRO -ASPART -GLULISINE
3-5 hours
1st monomeric insulin analog to be marketed
produced by recombinant technology
LISPRO (humalog)
short acting insulin
HUMULIN R
ACTRAPID HM
onset of action of short acting
HUMULIN R
ACTRAPID HM
30min- 1hr
so give 30-45 min ac
peak of action of short acting
HUMULIN R
ACTRAPID HM
2-3 hours
duration of action of short acting
HUMULIN R
ACTRAPID HM
5-8 hours
delayed onset of action and peak action is caused by
short acting
HUMULIN R
ACTRAPID HM
hexameric structure
NPH neutral protamine hagedorn isophane insulin(HUMULIN N)
intermediate acting
use of protamine
added to prolong the action of insulin
onset of action of NPH neutral protamine hagedorn isophane insulin(HUMULIN N)
2-5 hours
NPH neutral protamine hagedorn isophane insulin(HUMULIN N) duration of action
10-20h bid-qid
onset of action and duration of action of NPH are affected by the
dose
the only insulin used to provide for basal insulin requirements
NPH neutral protamine hagedorn isophane insulin(HUMULIN N)
long acting insulin analogs
GLARGINE (lantus)
DETEMIR
DETEMIR is given
2x a day
GLARGINE is peakless and is given
once a day
insulin combination’s onset will depend on
short acting insulin LISPRO ASPART GLULIGINE regular
insulin combination duration will depend on
long acting -NPH
insulin regimens
basal bolus
split mixed
most physiologic between two regimens
basal-bolus
basal bolus dose
GLARGINE - hours after supper
+rapid acting or short acting - before meals:BLS
split mised dose
before breakfast: NPH + rapid or short acting
insulin absorption
directly into the bloodstream
variability of insulin absorption more prominent with
regular human - short
NPH - intermediate
absorption site of insulin
abdomen>arms>thighs>buttocks
for px with kidney problem use
endo - liver 60%
complications of insulin therapy
hypoglycemia insulin allergy, resistance weight gain lipodystrophy increased cancer risk
immune insulin resistance prone in
use of beef insulin
obese with type 2
interrupted tx
rises insulin requirements in immune resistance
IgG anti insulin antibodies
increased cancer risk is attributed to
insulin resistance
hyperinsulinemia- prediabetic and type 2
insulin indications
type 1 DM pregnant diabetics ketoacidosis, nonketotic coma very ill patients peri op control, patients in labor hypersensitivity or inadequate response to oral hypoglycemic kidney or liver disease
why is insulin the DOC for pregnant diabetics
doesnt cross the placenta
wont cause fetal hypoglycemia
biggest group of antihyperglycemic drugs other than insulin
sulfonylures
2nd generation sulfonylureas
GLIPIZIDE (minidiab)
GLIBENCLAMIDE / GLYBURIDE (daonil)
GLICAZIDE (diamicron)
GLIPERAMIDE (norizec)
preferred less AE and DI of sulfonylureas
2nd generation
short acting sulfonylureas
TOLBUTAMIDE- 2-3x a day
Intermediate acting sulfonylureas
1-2 per day
GLIPIZIDE (minidiab)
GLIBENCLAMIDE / GLYBURIDE (daonil)
GLICAZIDE (diamicron)
GLIPERAMIDE (norizec)
long acting sulfonylureas
CHLORPROPAMIDE
1x day
moa of sulfonylureas, glinides, d phenylalanine derivatives
stimulate insulin release from pancreas by interacting with ATP sensitive K channels on pancreatic beta cells
additional MOA of sulfonylureas
⬇️ serum glucagon secretion
bind to extrapancreatic receptors and close K channels
CI of sulfonyureas
type 1 DM, ketoacidosis
renal and hepatic impairment
pregnancy
only sulfonylurea for pregnancy
GLYBURIDE (daonil)
GLIBENCAMIDE dose
5-10 mg tab OD
GLIBENCAMIDE is given
30 mins before breakfast
AE of sulfonylureas
hypoglycemia GIT weight gain Disulfram like rxn with alcohol agranulocytosis, thrombocytopenia
meglitinide or glinides
REPAGLINIDE (novonorm)
pk of REPAGLINIDE
short half life
onset: 1hr
use of REPAGLINIDE
lower postprandial glucose-given at start of meals
monotherapy or combination with Biguanides
SE of REPAGLINIDE
hypoglycemia
weight gain
REPAGLINIDE CI
hepatic impairment
d phenylalanin derivatives
NATEGLINIDE (starlix)
NATEGLINIDE PK
short half life
onset : 20 mins
use of NATEGLINIDE
lower postprandial glucose given at start of meals
NATEGLINIDE se
hypoglycemia-lowest
weight gain
insulin secretagogue that can be given to DM px with renal impairment
D phenylalanine derivatives- NATEGLINIDE (starlix)
moa of biguanides
❤️ decrease hepatic glucose production by activating AMP activated protein kinase (AMPK)➡️ suppress ATP dependent processes like gluconeogenesis➡️ block glucose
increase glucose uptake in muscle and fat
lipid lowering effect
half life of biguanides
1.5- 3 hrs
duration of action of biguanides
7-12 hrs
extended release biguanide duration
24 hours
biguanide dosing
once a day
interesting pk of biguanide
not metabolized, excreted as an active compound
AE of biguanides
dose related GIT anorexia lactic acidosis decreased b12 absorption during long term metallic taste
uses of biguanides
first line tx of t2 DM
prevention of t2 DM in impaired glucose tolerance test
PCOS
the only biguanide in the market
METFORMIN (glucophage)
dosage form of METFORMIN
500 mg
500 mg XR
850 mg
1 g tablets
METFORMIN dose
500 mg to max 2.5 g per day on 3 divided doss with meals
METFORMIN CI
withold in conditions predisposing to renal insufficiency and or hypoxia
- CV collapse
- severe infection
- alcoholism
- renal, liver dysfxn
- ⬆️risk of lactic acidosis
resume METFORMIN 48 hours after the following
use of IV iodinated contrast material
major surgical procedures
thiazolidinediones
PIOGLITAZONE (actos)
moa of PIOGLITAZONE
bind to peroxisome proliferator activated receptor PPAR y
➡️activates insuline responsive genes that reg cho and lipid metab
➡️ increase tissue sensitivity to insulin
target tissues of PIOGLOTAZONE
fat
muscle
liver
secondary effect of PIOGLITAZONE
decrease hepatic glucose production
onset of PIOGLITAZONE
4-12 weeks
ppar alpha effect of PIOGLITAZONE
⬇️ TAG
slight ⬆️ HDL, LDL
Use of PIOGLITAZONE
add on to other insulin therapies
AE of PIOGLITAZONE
❤️edema and weight gain
hepatotoxic : TROGLITAZONE
risk of bone fractures
PIOGLITAZONE CI
pregnancy
significant liver disease
CHF
alpha glucosidase inhibitors
ACARBOSE (glucobay, gluconase)
VOGLIBOSE (basen)
MIGLITOL
moa of AG inhibitors
inhibit alpha gluconidase - no weight gain or hypoglycemia
alpha gluconidase fxn
breaks down polysaccharides to monosaccharides in intestinal brush border, delaying CHO absorption
dose of ACARBOSE (glucobay, gluconase)
50-100 mg od-tid after 1st spoonful of meal
VOGLIBOSE dose
0.2-0.3 mg TID AC
AE dose related AG inhibitors
malabsorption flatulence diarrhea abdominal pain bloating reversible elevated liver fxn test
why should AG inhibitors be started at low doses
flatulence AE
CI AG inhibitors
IBD
intestinal conditions
renal, hepatic impairment
advantage of using AG inhibitors
type 1 and 2 DM
because it is limited to the gut only
disadvantage of using AG inhibitor
not very effective, only a secondary drug
enteric hormones that segment glucose dependent insulin secretion when glucose is taken orally
INCRETIN
enzyme that degrades incretins
DPP4 dipeptidyl peptidase 4 inhibitor
moa of GLP1 analogs
stimulate b cell to release insulin in response to oral glucose load
GLP1 analog
EXENATIDE (byetta)
SC injections of EXENATIDE are absorbed
equally
arm, ab, thigh
EXENATIDE peak
2 hours
EXENATIDE duration
til 10 hours
major SE of EXENATIDE
diarrhea
SE of EXENATIDE
GI
weight loss
headache
hemorrhagic pancreatitis
dosage of EXENATIDE
5 mcg BID SC to 10 mcg SC 60 mins A
before meals
when should dose of EXENATIDE be adjusted?
if crea clearance is <30 ml/min
DPP 4 inhibitors
SITAGLIPTIN (januvia)
bioavailability of SITAGLIPIN
87%
half life of SITAGLIPIN
8-14 hours
preparations of SITAGLIPIN
25 mg
50 mg
100 mg
dosage of SITAGLIPIN
25-100 mg OD
unchanged SITAGLIPIN in urine
79%
advantage of SITAGLIPIN to EXENATIDE
oral
relatively safe
adv of GLP 1 agonists
increases GLP 1 levels promoting satiety and prolonging gastric emptying time resulting in weight loss
DPP 4 inhibitors adv
maintains physiologic level of GLP 1 in the body
amylin analogs
PRAMLINTIDE
37 aa compound secreted with insulin from beta cells
deficient in type1,2
renal clearance
AMYLIN
physiologic effects of AMYLIN
inh glucagon secretion esp in postprandial state
reduction of gastric emptying time
synthetic analog of AMYLIN
PRAMLINTIDE
an effect of PRAMLIMTIDE on appetite
anorectic
PRAMLINTIDE admin
SC injection
PRAMLINTIDE AE
hypoglycemia
nausea
vomiting
how is PRAMLINTIDE used with INSULIN
separate admin
preprandially
for type 1,2
initial therapy
1-2% lifestyle change to dec wt and inc activity
1.5% METFORMIN- biguanides
additional therapy
INSULIN
SULFONYLUREAS- Gs
TZDs - PIOGLITAZONE
weight neutral advantage
ACARBOSE- AG inh