Insulin and Oral hypoglycemics- Duan Flashcards
In healthy humans, blood glucose is tightly maintained (normal fasting blood sugar level is (blank) mg/dL, two hours after eating is (blank) despite wide fluctuations in glucose consumption, utilization, and production.
70-99
Adjusting the amount of insulin secreted from the (blank) cell is central in the glucose homeostasis process.
pancreatic β
The islet cells in the endocrine pancreas comprise (blank) percent of pancreatic volume.
These cells are highly (blank, blank) and contain multiple cell types secreting a variety of hormones
1-2%
vascularized
innervated
What do alpha cells (make up 20% of islet mass) of the pancreas secrete?
glucagon
What do beta cells (make up 75% of islet mass) of the pancreas secrete?
insulin, C-peptide, amylin
What do pancreatic D cells secrete?
E cells?
G cells?
G cells (PP Cells)?
somatostatin
ghrelin
gastrin
pancreatic polypeptide (PP)
What is the standard preparation for insulin?
Humulin (human insulin preparations, recombinant protein)
How do you treat Diabetes?
insulin
hypoglycemics
oral agents
non-insulin injectables
What are the 6 types of oral hypoglycemics?
1) insulin secretagogues
2) insulin sensitizers
3) a-glycosides
4) Dipeptidyl peptidase 4
5) GLucagon like peptide analogue
6) sodium glucose cotransporter 2 (SGLT2)
What are the insulin secretagogues?
sulfonylureas -tolbutamide -chlorpropamide -glipizide -glyburide Non sulfonylurea -meglitinides
What are the insulin sensitizers?
Biguanides -metformin Thiazolidinediones (TZD) -Rosiglitazone -Pioglitazone
What are the alpha-glycosidase inhibitors (AGI)?
acarbose
What are the dipeptidyl peptidase 4 (DPP-4) inhibitors?
sitagliptin
What are the Glucagon like peptide (GLP-1) analgogues?
exenatide
What are the sodium glucose cotransporter 2 inhibitors?
Jardiance
What are drugs with hyerglycemic effects?
- epinephrine
- glucocorticoids
- diuretics
- b2 agonists
- morphine
- clonidine
- phenytoin
- Ca2+ channel blockers
What are drugs with hypoglycemic effects?
- B2 antagonists
- Salicylates
- Ethanol
- Clofibrate
- ACE inhibitors
- Theophylline
- Sulfonamides
- Pyridoxine
the primary action of ethanol is to inhibit (blank)
gluconeogenesis
In diabetic patients, (blank) pose a risk of hypoglycemia due to their inhibition of catecholamines gluconeogensis and glycogenolysis effects
beta blockers
(blank) may mask the sympathetically mediated symptoms associated with the fall in blood glucose (e.g., tremor and palpitations, perspiration).
B-blockers
(blank) exert their hypoglycemic effect by enhancing pancreatic -cell sensitivity to glucose to promote insulin secretion in patients able to secrete insulin (some Type 2 diabetics and non-diabetics).
Salicylates
Where does SGLT2 inhibitors work and how?
inhibits reabsorption of glucose by the kidneys
What does insulin secretatogues do and where do they work?
promotes insulin secretion from the pancreas
What does intestinal lipase inhibitor and AGI do?
inhibits intestinal lipase (blocks FFA absorption) and glucose absorption in the intestines
What does TZD do and where does it work?
Adipose tissues and blocks FFA release
What does Biguanide do and where does it work?
blocks glucose release from liver
What are insulin analgoues? How is each type different? How do you administer them? What is the half life? How are they eliminated?
insulin preparations
onset and duration of action
subcutaneous injection
9-10 minutes
liver and kidnet
BOLUS (PRANDIAL) INSULINS
What are the rapid-acting (AKA ultra short acting) insulin analogues (clear)?
When is their onset?
When is their peak effect?
What is their duration of action?
What are these types of insulin analogues less associated with which makes them a really good drug?
Insulin lispro (takes longer to reach peak and has longer duration of action)
Insulin aspart
Insulin glulisine
Mneumonic: These dont LAG
Onset: 10-15 minutes
Peak: 1-1.5 hrs
Duration: 3-5
less associated with hypoglycemia
BOLUS (PRANDIAL) INSULINS
What are the short acting insulin analogues (clear)?
When is their onset?
peak?
Duration?
Insulin regular (humulin-R) Insulin regular (novolin)
30 minutes
2-3 hr
6.5 hr duration
BASAL INSULINS What are the intermediate-acting insulin analogues (cloudy)? When is their onset? peak? Duration?
Insulin NPH (Humulin) Insulin NPH (Novolin) 1-3 hr 5-8 hr up to 18 hr
BASAL INSULINS What are the long-acting insulin analogues (clear)? When is their onset? peak? Duration?
-Insuin determir (levemir)
-Insulin glargine (lantus)
90 min
not applicable
up to 24 hr (glargine 24hr, determire 16-24 hr)
What type of insulin analogue is this:
(blank) insulin is given 15 minutes prior to a meal and has its peak effect 30-909 minutes after injection (vs 50-120 minutes for regular insulin)
Lispro
What type of insulin analogue is this:
(blank) can be given anywhere from 15 minutes prior to 20 minutes after beginning a meal.
Lispro
What type of insulin analogues are these:
Soluble, crystalline zinc insulin, usually give S.C, rapidly lowers gluce levels. Made with genetically engineered bacteria
Short-acting insulins (clear)
-Insulin regular (humulin, novoline)
What is this:
a suspension of crystalline zinc insulin combined with protamine (a polypeptide). The conjugation with protamine delays its onset of action and prolongs it effectiveness. It is usually given in combination with regular insulin.
Intermediate-acting insulins (cloudy)
- Insulin NPH (humulin)
- Insulin NPH (Novolin)
What is this:
Precipitation at the injection site extends the duration of action of this preparation.
Long-acting basal insulin analogues (clear)
-Insulin glargine (lantus)
What is this:
has a FA complexed with insulin resulting in slow dissolution.
Insulin detemir (levemir)
What are the adverse effects of insulin?
- HYPOGLYCEMIA (happens a lot with ethanol consumption)
- HYPOKALEMIA
- weight gain
- injection complications
- insulin resistance
What are the symptoms of hypoglycemia induced by insulin?
short effect agents: sweating, hunger, palpitations, tremor, anxiety, increased HR, diaphoresis, MS changes, Long effect agents: Neuroglycopenic symptoms (such as difficulty in concentratins, confusion, weakness, drowsiness, unconsciousness)
Why do you get hypokalemia with insulin use?
insulin draws K+ into the cell with glucose
What are the injection complications that can occur with insulin use?
- IgE mediated local cutaneous reactions
- Lipodystrophy at injection site
What can cause acute insulin resistance?
Chronic?
acute-stress chronic- 1) AIRA (antiinsulin receptor autoantibody) 2) down regulation of receptor 3) dysfunction of glucose transfer
Healthy, non-diabetic individuals usually maintain a blood glucose profile of 60 – 100 mg/dl overnight and before meals, and <(blank) mg/dl (ADA goals).
90-130
180
What is a bonus dose and how does it work?
give 1 unit of rapid acting insulin for 12-15 g of carbs
or
for high blood sugar correction, 1 unit of rapid acting insulin to drop 50 mg/dl blood sugar (depends on individual sensitivity)
From quickest effects to slowest and longest effects put all the types of insulin in order.
Rapid (lispro, aspart, glulisine) Short (regular) Intermediate (NPH) Long (Determir) Long (glargine)
What is the general calculation for total daily insulin?
TDI=body weight (lbs) / 4
What is the basal/background insulin dose equation?
50% X TDI
What is the carbohydrate coverage ration (CHO)?
500 / TDI dose= 1 unit insulin cover grams of 12g/ CHO
What is the high blood sugar (HBS) correct factor equation?
1800 / TDI= 1 unit insulin drops 45 mg/dl blood sugar
(blank) are effective and convenient for the treatment of type 2 DM who do not respond adequatley to non-medical interventions (diet, exercise and weight loss).
Oral hypoglycemics
Newly diagnosed type 2 diabetes often respond well to (blank)
oral agents
Patients with long standing disease require (blank)
combo of agents with or without insulin
The progressive decline (blank) function often necessitates the addition of insulin at some time in the tx of type 2 diabetes
b-cell function
What is the first widely used oral anti-hyperglycemic medication?
sulfonylureas
What are the first gen sulfonylureas?
tolbutamide, chlorpropamide
What are the second gen sulfonylureas?
glyburide (glibenclamide), glipizide, glimepiride
What do sulfonylureas do?
promote secretion of insulin from B-cells (secretagogues)
What is the mechanism behind sulfonylureas?
- block ATP sensitive K+ channels (Katp) ->depolarization->opening of Ca2+ channel influx->promotes insulin secretion
- increased number of insulin receptors
- reduce glucagon secretion and increase binding of insulin to target tissues.
What do sulfonylureas require?
normal B cells
What do sulfonylureas bind to?
How are they metabolized?
How are they excreted?
Bind to plasma proteins
Metabolized in liver
Excreted by liver or kidney
What are the short acting sulfonylureas? What is the onset and duration?
Tolbutamide (Orinase)
6-12 hrs
What are the intermediate acting sulfonylureas?
Tolazamide (tolinase)
Glipizide (glucotrol)
Glyburide (Diabeta)
What are the long action sulfonylureas?
Chlorpropamide, Glimepiride (24 hours)
What do you use sulfonylureas for?
-Type 2 DM
only
Best with patients >40 year-old, Type 2 DM <10 years
(NOT INDICATED IN TYPE 1 patient because it requires normal B cells to work)