diabetes pharmacology Flashcards
what is insulin usually used for?
- type 1 diabetes
- ketoacidosis
- type 2 (chronic)
- gestational DM
- hyperkalemia (too much potassium)
what are the different kinds of diabetes?
- rapid acting
- short acting
- intermediate
- long acting
- mixed
what are the different kind of rapid insulin?
- lispro, longest onset
- aspart
- glulisine
what is the onset of rapid acting insulin?
when to take the med
15mins onset
take medication with food
what are the different kind of short acting insulin?
- regular
- antrapid
- humulin R
what is the onset for short acting insulin?
when to take the medication?
30min-60min onset of action
take the medication 30min before food
what are the different type of intermediate insulin
- insulatard
2. humulin N
what is the onset of action for intermediate insulin?
when to take the medication?
1-4 hour onset of action
does not matter when medication is taken
what are the different long acting insulin?
- glargine
2. detemir
what is the onset of action for long acting insulin?
when to take the medication?
1-4 hour
does not matter when medication is taken
what are the different pre mixed insulin?
- mixtard 30 = 30regular(shortacting) 70intermediate
2. mixtard 50 = 50regular(shortacting) 50intermediate
what is the onset for premixed insulin?
when to take the medication?
30-60mins onset
taken immediately with food
what insulin are suitable for post prandial control?
rapid and short acting insulin help control the surge of sugar from meals
what insulin is suitable for fasting basal control?
intermediate and long acting insulin help control the sugar produced by the body
what are cloudy insulin ?
intermediate and longacting
what are clear insulin?
rapid and short acting insulin
what is the route of insulin?
usually S/C
emergency and ketoacaidosis IV (10min onset action)
which insulin take the longest to work? (longest onset of action)
NPH (intermediate insulin)
which insulin has the highest risk of hypoglycemia ?
NPH (intermediate)
what is antrapid sliding scale used for?
to correct any hyperglycemic episode
regular/ rapid acting insulin is given as S/C injection
example of antrapid sliding scale
10.1 - 14 give 2
14.1 - 18 give 4
18.1 - 22 give 6
more than 22 give 8
for patients going for surgery and on bolus and basal insulin what to do?
- continue basal or decrease percentage if needed
- stop bolus
- stop all PO medication
- start 5% dextrose drip
- sliding scale every 4 hours
for patients going for surgery on premixed insulin what to do?
- convert to basal insulin, follow the intermediate one
- stop all PO medication
- start dextrose 5%
- sliding scale every 4 hours
but do serve mixtard at dinner the day before
for patient going surgery without any insulin
for a short fasting (1 meal)
- omit the PO drugs
- start antrapid scale
for long fasting (2 meals or more)
- omit PO drugs
- start insulatard (0.1unit/kg)
- start dextrose 5%
- sliding scale every 4 hours
what is the first line diabetes drug?
metformin
what is the mechanism of metformin?
- increase insulin sensitivity
- stimulate glycolysis in tissue (direct use of insulin by tissue)
- decrease gluconeogenesis in liver and kidney (formation of glucose)
- slow glucose absorption in GI tract
what are the side effects of metformin?
- GI upset (nausea, bloating, diarrhoea)
2. reduced B12 absorption
what are the contra for metformin?
- renal dysfunction (kidney)
- tissue not enough oxygen
- hepatic dysfunction (liver)
- alcoholism
why is metformin a first line drug?
- cheap, safe
2. reduce the risk of cardiovasular risk and death
what are the different classes of drugs for diabetes
insulin secretagogues
insulin sensitizer
insulin sparing agents
what is under the insulin secretagogues ?
sulfonylurea
what is under insulin sensitizer?
thiazolidinedione
biguanide
what is under insulin sparing agents
- acarbose
- GLP 1 receptor agonist
- DPP 4 inhibitor
- SGLT2 inhibitor
what is the easy way to remember sulfonylurea?
what are the medication for sulfonylurea
MIDE
Glibenclamide (longest acting)
tolbutamide
chlorpropamide
what is the function of sulfonylurea?
it increases the secretion of insulin
sulfonylurea binds to its receptors on the K+ ATP channels causing them to close and the cell will depolarise causing Ca channel to open and secrete insulin
what are the key adverse effect of sulfonylurea ?
- hypoglycemia
- weight gain
- allergic skinrash
- bone marrow damage
- increased CVS death
what kind of patient profile will have a higher risk of hypoglycemia ?
Elderly
poor renal function
hepatic dysfunction
people with irregular eating habits
what is the easy memorizing for thiazolidinedione ?
what are the medication for thiazolidinedione?
ZONE
rosiglitazone
pioglitazone
what is the mechanism for thiazolidinedione?
bind to PPAR and upregulate
- lipoprotein protease (convert triglycerol to glycerol and fatty acids)
- fatty acid transport protein ( transport into cell)
- Glut 4 transport of glucose into the cell for storage
helps to decrease triglyceride in body
reduce glucose output
increase glucose uptake into muscle tissue
increase insulin sensitivity at adipose tissue and muscles
what are the adverse effects of thiazolidinediones (TZD)
- hypoglycemia (when with sulfonylureas or insulin)
- hepatotoxicty
- fluid retention, peripheral edema, increased risk of hF
- weight gain
will obese patient be suitable for TZD
Ideally not recommended as the drug can cause weight gain
contra of TZD
liver disease
heart failure
what is the name of drug for alpha glucosidase inhibitor?
acarbose : glucobay
can be used as monotherapy or with sulfonylurea / biguanide
what is the mechanism of acarbose?
acts as competitive inhibitor and bind to glucosidases and delay the digestion of polysaccarides and the increase in blood glucose level will be less steep\
by decreasing the amount of glucose in the body, the amount of insulin produced by the body decreases too
when to take acarbose?
taken just before ingesting a meal
what are the side effects of acrabose ?
- elevated liver enzymes
- flatuence (farting)
- diarrhoea (no longer digesting the food)
what kind of patients are contra for acrabose
Gastrointestinal diseases like Inflammatory bowel disease
severe renal and hepatic disease
which two drugs work on the same pathway?
Dipeptidyl peptidasae-4 inhibitors,
GLP-1 receptor agonist
what are is the easy name for GLP-1 receptor agonist ?
what are the names of the drugs of GLP-1 receptor agonist?
TIDE exenatide liraglutide albiglutide dulaglutide
what is the mechanism of GLP-1 receptor agonist ?
GLP is usually released in small and large intestine in response to presence of food
agonist increases insulin release and reduce glucagon’s secretion
how are GLP-1 administered?
subcutaneosly
what is the easy name for DPP-4inhibitors?
what are the medication name of dpp4 inhibitors
LIPTIN
sitagliptin saxagliptin linagliptin alogliptin vildagliptin
what is the mechanism of DPP4 inhibitors ?
DPP 4 usually deactivate GLP, therefore DPP4 will allow GLP to be active
what are the adverse effect of GLP-1 agonist and DPP4 inhibitor ?
GI related issues
pancreatitis (not recommended for patients with a history of pancreatitis
what are the benefits of GLP-1 agonist and DPP4 inhibitors ?
Weight loss
improved cardiovascular outcomes
what is the easy names for SGLT2 inhibitors ? Sodium glucose co transporter inhibitor
what are the drug names of SGLT2 inhibitors ?
GLIFLOZIN
canagliflozin
dapagliflozin
empagliflozin
what is the mechanism of SGLT2 inhibitors ?
they block the reabsorption of glucose in the kidney to increase glucose excretion, thus lower blood glucose levels
also allow increased insulin sensitivity and uptake of glucose in muscle cells
what are the patients that you usually use SGLT2 inhibitors on?
diabetes with cardiovascular disease
reduced risk of hospitalizaton due to heart failure and reduced risk of worsening renal function
what are the adverse effect of SGLT2 inhibitors?
increased genital infections
urinary tract infection due to more glucose in urine= infection
Which hypoglycemic agents are associated with weight gain?
sulfonyureas
thiazolidinedione
meglitinides
Which hypoglycemic agents are associated with more favorable cardiovascular disease outcomes?
Metformin, SGLT-2 inhibitors, GLP-1 receptor agonist