Block 3 Flashcards
What drugs or hormones increase insulin secretion?
Sulfonylureas
Meglitinides
Incretins
What drugs or hormones decrease glucagon secretion?
Incretins
Amylin
What drugs or hormones decrease glucose reabsorption?
SGLT2 inhibitors
What drugs or hormones increase glucose uptake and utilization?
Thiazolidinediones
Metformin
What drugs or hormones are correlated w/ lipotoxicity?
Thiazolidinediones
What drugs or hormones decrease hepatic glucose output?
Thiazolidinediones
Metformin
What are the pharmaceutical targets in regulating insulin secretion?
GI hormones
Pancreatic hormones
Liver cells and carbohydrate metabolism, what is the metabolic action via insulin?
Gluconeogenesis goes down
Glycogenolysis goes down
Glycolysis goes up
Glycogenesis goes up
Liver cells and fat metabolism, what is the metabolic action via insulin?
Lipogenesis goes up
Lipolysis goes down
Liver cells and protein metabolism, what is the metabolic action via insulin?
Protein breakdown goes down
Fat cells and carbohydrate metabolism, what is the metabolic action via insulin?
Glucose uptake increases
Glycerol synthesis increases
Fat cells and fat metabolism, what is the metabolic action via insulin?
Synthesis of TG
Synthesis of FA
Lipolysis goes down
Fat cells and protein metabolism, what is the metabolic action via insulin?
Nothing happens
Muscles and carbohydrate metabolism, what is the metabolic action via insulin?
Glucose uptake increases
Glycolysis goes up
Glycogenesis goes up
Muscles and fat metabolism, what is the metabolic action via insulin?
Nothing happens
Muscles and protein metabolism, what is the metabolic action via insulin?
AA uptake increases
Protein synthesis increases
What are the ultra-short acting insulins or rapid acting?
Lispro (Humalog)
Aspart (Novolog)
Glulisine (Apidra)
What are the short acting insulins?
Regular insulin (Novolin)
When Regular insulin (Novolin) in administered subcutaneously, what form does it inject as?
Hexamer then dimer then a monomer
When should regular insulin (Novolin) be given?
30 to 45 min before meals
What are the intermediate-acting insulins?
NPH (Humulin)
NPH (Humulin) is a complex made up of…
Insulin + Protamine**
**Requires proteolytic degradation for absorption of insulin
What are the long-acting insulins?
Insulin glargine (Lantus, Toujeo)
Insulin detemir (Levemir)
Insulin Degludec (Tresiba)
MOA of Metformin?
Unknown but linked to decreased ATP and increased cAMP
Decreases hepatic glucose production
Decreases intestinal absorption of glucose
Enhances insulin sensitivity
What are some advantages of Metformin?
- No Wt gain
- No hypoglycemia
- Significant lipid lowering effect
- Works on those who are insulin resistant
AE of Metformin?
- Vit. B12 deficiency
- Lactic acidosis
- Heptatitis
Contraindications of Metformin?
- Metabolic acidosis or diabetic ketoacidosis
- Renal insufficiency
- Cardiac collapse / acute MI
- Use w/ iodinated contrast
MOA of sulfonylureas?
Blocks ATP-sensitive K+ channels which leads to depolarization and influx of calcium
Results in insulin secretion which lowers blood glucose
Which Rx has extrapancreatic effect and what is it?
Sulfonylureas
Suppresses hepatic glucose output
Sulfonylurea AE?
- Hypoglycemia
- Tremors and nervousness
- GI hemorrhage
- Hemolytic + G6PD deficiency anemia
- Cholestatic jaundice
- Weight gain
Which sulfonylurea has active metabolites?
Glyburide
What are some Rx interactions w/ sulfonylureas?
Dulaglutide and acarbose
Causes hypoglycemia
**non-sulfonylurea insulin releasing agents also interact with these Rx^
What are the non-sulfonylurea insulin releasing agents?
Nateglinide (Starlix)
Repaglinide (Prandin)
Compare the sulfonylureas with the non-sulfonylurea insulin releasing agents
Non-sulfonylurea agents have shorter half life and has rapid action (just take 30min before meals)
Non-sulfonylurea insulin releasing agent AE?
Hypoglycemia
Respiratory infection
Headaches
What drug is an alpha-glucosidase inhibitor?
Acarbose (Precose)
Miglitol (Glyset)
Acarbose MOA?
Inhibits digestion of complex sugars (take w/ meals)
Decreases carb uptake after a meal
Acarbose AE?
Causes flatulence, GI problems which leads to poor acceptance and compliance
Contraindications of Acarbose?
- Major GI issues (ulcers, inflammatory, etc)
2. Liver cirrhosis
What are some drug interactions of Acarbose?
Dont take w/ another anti-diabetic (risk of hypoglycemia)
Pioglitazone MOA?
Stimulates PPAR gamma receptors in adipose tissue and other cells
Leads to activation of transcription factors
Decrease insulin resistance (increases sensitivity of insulin)
Increases glucose uptake and increases hepatic glucose output
Which diabetic Rx requires liver enzyme tests?
Pioglitazone
Pioglitazone AE?
- Water retention and Wt gain
- Anemia
- Limb fractures
- Respiratory infection
- Heart, liver failure **can worsen congestive heart failure
- Bladder cancer
- Macular edema
What are some drug interactions with pioglitazone?
Decreased lvls of nifedipine
What diabetic Rx has a black box warning and what is the warning?
Exenatide - Causes medullary thyroid carcinoma
GLP-1 agonists = thyroid C-cell tumors
AE of Exenatide?
- Hypoglycemia if combined w/ other antidiabetic Rx
- Pancreatitis and pancreatic cancer
- Acute renal failure
What are some contraindications of Exenatide (or just GLP-1 agonists)
Multiple endocrine neoplasia syndrome type 2
Family history of medullary thyroid carcinoma
***except with lixisenatide (Adlyxin)
Which Rx is the GLP-1 analog?
Exenatide, Liraglutide
Which Rx is the synthetic amylin analog?
Pramlinitide (Symlim)
Pramlinitide AE?
Weight loss
Decreased gastric emptying
Hypoglycemia
When is Pramlinitide used?
Adjunct to insulin
Injected before meals, just DONT mix with insulin
What are the DPP-4 inhibitors?
Sitagliptin
Sitagliptin MOA?
DPP-4 inhibitor
Degrades GLP-1 and GIP
Stimulates “glucose DEPENDENT” insulin secretion (just like GLP-1 agonists)
Sitagliptin AE?
Nasopharyngitis
Pancreatic cancer
Acute renal failure
SJS
Rhabdomyolisis
Which diabetic Rx can cause acute renal failure?
Exenatide
DPP-4 inhibitors
Which diabetic Rx can cause pancreatic cancer?
Exenatide
DPP-4 inhibitors
What kind of Rx is Canagliflozin?
SGLT-2 inhibitors
Reduces blood glucose
Which Rx works independently of insulin?
SGLT-2 inhibitors
SGLT-2 inhibitor AE?
Urinary infections
Hypovolemia
Diabetic ketoacidosis
Pancreatitis
Bone fractures
Renal impairment
SGLT-2 inhibitor contraindications
Severe renal impairment
Possibility of hypotension
Hyperkalemia
What are some drug interactions with SGLT-2 inhibitor?
Digoxin, increased levels
What are some clinical pearls of metformin?
Hold metformin during periods following stress due to increased %% of lactic acidosis
D/c metformin 48hrs prior to contrast dye due to acute renal damage
Second line therapy for GDM
What is the starting dose for metformin? Titrated? Max dose?
Start: 500mg BID or 850mg QD (IR)
500mg daily w/ evening meal (ER)
Titrated: 500mg weekly or 850mg every 2 wks (IR only)
Max: 2550mg (IR) + 2000mg (ER)
Does metformin need to be renally/hepatically adjusted? If so, how is it adjusted?
eGFR from 30 to 45 = do not start or adjust for 50% for existing therapy
Liver = caution due to %% of lactic acidosis
What diabetic Rx is concerned w/ Vit. B12 deficiency?
Metformin
What is the starting dose of pioglitazone? Titrated? Max?
Start: 15 or 30mg QD
Titrate: 15mg q4-6 wks
Max: 45mg
Does pioglitazone need to be renally/hepatically adjusted? If so, how is it adjusted?
No renal adjustments
Caution in liver impairment
When is pioglitazone contraindicated?
Initiation in pt w/ NYHA Class III/IV heart failure
What are some considerations you must think about when prescribing pioglitazone?
It has a delayed onset
What are the brand names for glyburide, glimepiride, and glipizide?
Glyburide - Diabeta
Glimepiride - Amaryl
Glipizide - Glucotrol
What are the generic names for Diabeta, Glucotrol, and Amaryl
Glyburide - Diabeta
Glimepiride - Amaryl
Glipizide - Glucotrol