Diabetes Flashcards
What is the cause of type 1 DM?
- absolute deficiency of insulin secretion*
- autoimmune destruction of beta cells d/t viruses
What is the cause of type 2 DM?
combination of:
- insulin resistance
- decline in beta cell secretion of insulin
- increase of glucose levels regardless of stimuli
- other hormonal deficiencies
What are the S&S of hyperglycemia?
- 3 P’s (polyuria, polydipsia, polyphagia)
- fatigue
define polyuria
- frequent urination
define polydipsia
- inability to quench thirst
define polyphagia
- loosing weight while eating a lot
What are the main risk factors of DM type 2?
- overweight/obese
- sedentary lifestyle
How often can you test HbA1C?
- q3mo
What are the tx goals for type 2 DM?
- A1C less than 7
- before meals 70-130mg/dL
- after meals less than 180mg/dL
What patient population are the tx goals more strict for?
- young
- active
- motivated
What is the tx for pre-diabetes?
- metformin
- diet
- exercise
What are the microvascular complications of diabetes?
- retinopathy
- neuropathy
- nephropathy
What are the macrovascular complications of diabetes?
- CAD
- HTN
- dyslipidemia
How is CAD, as a complication of DM, tx’d?
- ASA 81mg/d (baby aspirin)
What is the goal for HTN in DM?
- 140/90
What is the tx for dyslipidemia 2ndary to DM?
- statin
How are retinopathy & neuropathy, as complications of DM, tx’d?
- manage HTN & glucose
What is the tx for peripheral diabetic neuropathy?
- Gabapentin
- Lyrica
- Cymbalta
(all are symptomatic tx, not DM txs)
What is the tx for autonomic diabetic neuropathy?
- Reglan
What is the tx for diabetic nephropathy?
- ACE-I or ARB
- manage HTN & glucose
What is the tx protocol for DM?
- metformin
- ADD sulfonylurea, TZD, DPP4 inhib, GLP1 ag, OR basal insulin
- ADD another 1 of the above
- ADD multiple doses of insulin
What are the oral diabetic agents?
- biguanides
- sulfonylureas
- meglitinides
- TZD
- alpha glucosidase inhibitors
- incretin mimetics (DPP4 inhib, GLP1 ag)
- sodium glucose co-transporter (SGLT)
What is an example of biguanides?
- Glucophage, Riomet, Glumetza (metformin)
What is metformin’s MOA?
- inhibits hepatic glucose production
- increases insulin sensitivity to peripheral tissues
What is metformin’s place in therapy?
- 1st line tx of DM
What is metformin’s A1C% reduction?
- > 2%
What is the dose of metformin?
- 1000mg BID
What are the side effects of metformin?
- GI (diarrhea) so take with meals
- lactic acidosis
- Vit B12 deficiency after tx for 2-3yrs
- wt loss
What is an absolute CI of metformin?
- creatinine levels (>1.4w, >1.5m)
What is an example of sulfonylureas?
2nd gen
- Amaryl (glimepiride)
- Glucotrol (glipizide)
- Micronase (glyburide)
What is the MOA of sulfonylureas?
- increases insulin production from pancreatic beta cells
How are sulfonylureas used in DM therapy?
- monotherapy
OR - conjunction with basal insulin or other oral agents
T/F: Over time, patients on sulfonylureas & meglitindes will loose beta cel function and become DM type I.
- True, after ~3-5y
What is the A1C % reduction of sulfonylureas?
- 1-2%
Patient has renal insufficiency, what sulfonylurea will you use?
- glipizide
no Renal, no R
What are the side effects of sulfonylureas?
- hypoglycemia
- wt gain
What is a precaution for sulfonylureas?
- sulfa allergy
What are examples of meglitinides?
- Starlix (nateglinide)
- Prandin (repaglinide)
What is the MOA of meglitinides?
- increases insulin production from pancreatic beta cells
similar to sulfonylureas
What is the use of meglitinides in therapy?
- monotherapy
OR - conjunction with oral agents
(similar to sulfonylureas
What is the A1C% reduction or meglitinides?
- 0.5-2%
T/F: Meglitinides have a longer half life than sulfonylureas?
- false
What are the benefits of meglitinides?
- side effects = less hypoglycemia & less wt gain than sulfonylureas
- works closer to the meal
What are examples of TZDs?
- Avandia (rosiglitizone)
- Actos (pioglitizone)
What is the MOA of TZDs?
- potent peroxisome proliferator-activated receptor-gamma (PPAR) agonist
- increases insulin-dependent glucose disposal & decreases hepatic glucose output by decreasing insulin resistance in the periphery and liver
What is the use of TZDs in therapy?
- monotherapy
OR - conjunction with other oral agents or insulin
What is a TZDs A1C% reduction?
- 0.5-1%
What are the side effects of TZDs?
- MAJOR DROWSINESS
- wt gain
- edema
- increased ovulation
- hepatic dysfxn
What is a contraindication of TZD?
- stage 3 or 4 heart failure (increases edema, side effect)
What are precautions of TZDs?
- active liver disease with ALT >2.5x normal
- monitor LFTs
What are examples of alpha glucosidase inhibitors?
- Glyset (miglitol)
- Precose (acarbose)
What is the MOA of alpha glucosidase inhibitors?
- inhibits the enzyme that hydrolyzes complex carbs
What is the place of alpha glucosidase inhibitors in therapy?
- monotherapy
OR - conjunction with other oral agents
(especially high postprandial glucose values)
What is the A1C% reduction of alpha glucosidase inhibitors?
- 0.5-1%
What are the SE of alpha glucosidase inhibitors?
- GI!!! (flatulence, diarrhea)
- tx hypoglycemia with simple sugars
What are examples of DPP4 inhibitors?
- Januvia (sitagliptin)
- Onglyza (saxaglibtin)
- Tradjenta (linagliptin)
- Nesina (alogliptin)
What is the MOA of DPP4 inhibitors?
- block DPP4
stops inactivation of GLP1 which allows lowering of blood glucose
What is DPP4’s normal action?
- inactivates GLP1, prevents lowering of blood glucose
What is DPP4 inhibitors place in therapy?
- type 2 DM
- in addition with other oral agents
What is the A1C% reduction of DPP4 inhibitors?
-0.4-0.85%
T/F: All DPP4 inhibitors need renal dose adjustments.
- False, all EXCEPT LINAGLIPTIN
What are the SE of DPP4 inhibitors?
- H/A
- URI
- wt loss/neutral
What are examples of GLP1 analogs?
- Byetta (exenatide)
- Victoza (liraglutide)
- Tanzeum (albiglutide)
- Trulicity (dulaglutide)
What is the MOA of GLP1 analogs?
- just different enough that DPP4 cannot break it down
What is the use of GLP1 analogs in therapy?
- 2nd line behind metformin
- good for patients that need to loose wt
What is the A1C% reduction of GLP1 analogs?
- 1-1.6%
Which GLP1s need and do not need renal dose adjustments?
- liraglutide = not studied
- exenatide = needs renal dose adjustment
- albiglutide, dulaglutide = does not need renal dose adjustment
What are the SE of GLP1 analogs?
- feeling full, nauseas, bloated
- no hypoglycemia
- wt loss
What are the black box warnings for GLP1 analogs?
- thyroid CA
- pancreatitis
What are the examples of SGLTs?
- Invokana (canagliflozin)
- Farxigan (dapagliflozin)
- Jardiance (empagliflozin)
What is the A1C% reduction of SGLT?
- 1%
T/F: SGLTs require renal dose adjustments
- true
What are the SEs of SGLTs?
- wt loss
- modestly lowers BP
- polyuria
- thirst
- nasopharengitis
- UTIs
- genital infx
Describe insulin
- regulator of glucose metabolism
- released from pancreatic beta cells in response to hyperglycemia
- inhibits hepatic glucose production
- facilitates glucose transport into cells
- stimulates glucose storage
What are the two categories of insulin on the market?
- prandial (with meals)
- basal (continued longer acting insulin)
What are the rapid acting insulins?
no LAG time
- Humalog (lispro)
- Novolog (aspart)
- Apidra (glulisine)
What are the long acting insulins?
- Lantus (glargine)
- Levamir (dentimir)
What type of insulin is used as bolus?
- rapid & short
What type of insulin is used as basal?
- intermediate & long
What are the pros of rapid acting insulin?
- better glucose control
- less frequent hypoglycemia
- convenient (can injx postprandial)
What are the pros of short acting insulin?
- no Rx needed
- inexpensive
- can tx DKA
- provides some basal activity
What are the cons of rapid acting insulin?
- $$$$$
- given prior to high fat meal, increases risk of early post-prandial hypoglycemia
What are the cons of short acting insulin?
- absorbed too slowly
- injx 30-45min prior to eating
- prolonged duration of action = late postprandial hypoglycemia
Discuss NPH
- causes peaks therefore must eat consistently
- can be mixed with other insulins to decrease # of injxs
Discuss glargine
- most used
- no peak = less hypoglycemia
- CANNOT be mixed with other insulins
Compare duration of action of detemir with NPH and glargine
- longer than NPH but shorter than glargine
Who should be on combination insulin injections?
- noncompliant pts
- pts that have fixed dosing schedules
What is U-500?
- 5x strength of all other insulins
Who should use U-500?
- type II DM whose total daily dose of insulin > 200units
What is the inhaled insulin?
- Afrezza (rapid acting)
What is the CI of inhaled insulin?
- pts w/ chronic lung dz or smoker in last 6mo
When is inhaled insulin dosed?
- beginning of meal
What is the starting dose of insulin for DM type 1?
- (0.3 to) 0.5 units/kg/d
- divide dose by 2 to determine prandial & basal doses
- tirate PRN
Discuss insulin schedule for type 2 DM
- consider when HbA1c >8%
- start with basal, titrate, add prandial PRN
What is the starting dose of insulin for DM type 2?
- 10 units intermediate/long
- increase by 1 unit per day until preprandial goal = 80-130mg/dL
What is the dose of starting prandial insulin for type 2 DM?
- 4 units w/ largest meal & add insulin to other 2 meals PRN
What is the 1700 Rule?
- general starting point for someone new to insulin
- 1 unit for every 50 units above goal
What is the calculation for the 1700 Rule?
- (1700/total daily dose) = amt of glucose that will be reduced by 1 unit of insulin
- 1 unit of insulin will lower the glucose level by (1700/total daily dose)
What is the 450 Rule?
- (450/total daily dose) = grams CHO covered by 1 unit insulin
- 1 unit of insulin will cover (450/total daily dose) grams of CHO
If the patient is on insulin, they should still be on ______ unless ????
- metformin
- metformin was contraindicated or not tolerated
If a pt is taking _____ they can continue this while on _____ _____ howerver, ?????
- sulfonylurea
- basal insulin
- it might be stopped if prandial insulin is started
Why would a patient on only basal insulin also be given GLP1s?
- especially if they need to loose weight
What else can be added to insulin regimen?-
- DPP4 inhibitor
- SGLTs
Why might a type 2 DM require higher doses of insulin than a type 1?
- insulin resistance
What is the tx for Somogi effect?
- reduce night insulin
What is the Somogyi effect?
- early am hypoglycemia followed by rebound hyperglycemia
What is the Dawn phenomenon?
- relative resistance to insulin in early am
What are diabetics supposed to do on sick days?
- continue insulin
- may require more since body is so stressed
How is hypoglycemia tx’d?
- Rule of 15
What is the Rule of 15?
- 15g sugar will raise your blood sugar by 15 points in 15 mins
What are the side effects of insulin?
- hypoglycemia
- wt gain
- injx site rxns
How do you store insulin?
- refrigerate unopened pens or vials
- room temp opened pens or vials
How do you mix insulin?
- clear before cloudy
What insulin cannot be mixed with anything?
- glargine
Diagnostic criteria of HbA1C
- normal: less than 5.7
- prediabetes: 5.7-6.4
- diabetes: over 6.5
Diagnostic criteria of FPG
- normal: less than 100mg/dL
- prediabetes: 100-125mg/dL
- diabetes: over 126mg/dL
Diagnostic criteria of OGTT
- normal: less than 140mg/dL
- prediabetes: 140-199mg/dL
- diabetes: over 200mg/dL