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Pharmacy School 2016-17 > Diabetes Therapeutics > Flashcards

Diabetes Therapeutics Flashcards

1
Q

When we consider insulin in a new diagnosis (ADA)

A

Symptomatic and/or have an AIC of 10% or more and/or CBGs 300 of higher

Insulin should always be considered if A1C is around 9-10% (this doesn’t mean the patient will be on it forever!)

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2
Q

Guideline recommendations for patient with long-standing suboptimally controlled T2DM and ASCVD

A

Empagliflozin or liraglutide (shown to reduce CV and all-cause mortality in combo with standard care)

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3
Q

Considerations for treating diabetes in older adults

A

Reduced life expectancy, higher CVD burden, reduced GFR, at risk for adverse events from polypharmacy, more likely to be compromised from hypoglycemia

Consider less ambitious targets (<7.5-8% if tighter targets not easily achieved)

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4
Q

Recommendations for reasonable A1C treatment goals in older adults based on level of health

A

Healthy (<7.5%)
Comorbidities (<8%)
Very complex/poor health (<8.5%)

*the key is to individualize

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5
Q

Considerations in treating a diabetic with renal disease

A

Increased risk of hypoglycemia

Avoid glyburide, use other insulin secretagogues cautiously

Reduce metformin dose when eGFR <45 and avoid if less than 30

Most DPP4 inhibitors require dose adjustment

avoid exenatide if CrCl <30 ml/min

avoid SGLT2 inhibitors for eGFR <45-60 (agent specific)

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6
Q

Which agents have minimal hypoglycemia risk?

A

Thiazolidinediones, DPP4s, SGLT2s and GLP-1s

Insulin and sulfonylureas should be avoided

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7
Q

Considerations for those with coronary disease

A

Avoid hypoglycemia

Empagliflozin reduces CV events in high-risk patients

Liraglutide reduces CV events in high-risk patients

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8
Q

Considerations for those with heart failure

A

Metformin is ok unless HF is severe or unstable

Avoid thiazolidinediones

Warning with DPP4i saxagliptin

Potential benefit with SGLT2 inhibitors based on diuretic effect

Liraglutide reduced CV outcomes in high-risk patients

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9
Q

EMPA-REG outcome(s)

A

Reduction in CV death, death from any cause and HF hospitalizations (with Empagliflozin compared with placebo)

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10
Q

LEADER outcome(s)

A

Reduction in CV death, death from any cause and microvascular outcomes

No reduction in HF hospitalizations, nonfatal MI or nonfatal stroke

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11
Q

LEADER vs EMPA-REG

A

The time to effect was delayed in the LEADER trial (Liraglutide, > 12-18 months) compared with EMPA-REG (< 3 months)

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12
Q

Considerations for those with liver dysfunction

A

Most drugs not tested in advanced liver disease

Pioglitazone and metformin may be beneficial for NAFLD but should be avoided in active or advanced liver disease

Insulin best option for patients with advanced disease

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13
Q

Considerations for those with obesity

A

Obesity can contribute to insulin resistance

Preference for or weight neutral or weight loss agents

Diet, physical activity and behavior changes (goal at least 5% weight loss)

Consider weight loss medications as adjunct to lifestyle

Consider or recommend metabolic surgery (if BMI > 30)

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14
Q

Which medications are ideal if patient wants to avoid weight gain?

A

DPP4, SGLT2 and GLP-1 agonist, metformin

Sulfonylureas, thiazolidinediones and insulin should be avoided

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15
Q

What medications are ideal if the patient wants to minimize cost?

A

Sulfonylureas, thiazoidinediones, metformin

DPP4, SGLT2, GLP1 and Insulin should all be avoided (except for insulin N/R 70/30 which is cheap at walmart)

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16
Q

Initial daily dose of insulin for T1DM

A

0.3-0.5 units/kg/day

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17
Q

Diabetes in pregnancy

A

Metformin + insulin preferred (glyburide now inferior)

Levemir, Humalog and Novolog (category B); Lantus (category C)

Tighter glycemic control indicated (especially for those with pre-existing T2/T1DM): bedtime 60-99, postprandial 100-129, A1C <6%

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18
Q

General guidelines for initiating/titrating insulin in T2DM

A

Start 10 U/day or 0.1-0.2 U/kg/day

Adjust 10-15% or 2-4 units once or twice weekly to reach FBG target

For hypo, do the opposite of the increase dose adjustment

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19
Q

Initiating basal insulin algorithm

A

Bedtime NPH, detemir glargine (start with 10 units or 0.1-0.2 U/kg and increase weekly/bi-weekly by 10-15% or 2-4 units)

If hypoglycemia then decrease by 10-20% or 4 units

If A1C not controlled after FBG reached and basal dose >0.5 U/kg/day add post-prandial insulin or consider GLP-1 agonist

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20
Q

Dosing consideration for insulin detemir

A

Dose dependent duration of action (6 hours at low doses-23 hours at high doses)

Appropriate to start with qd dosing and split later on if insulin appears to be wearing off

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21
Q

Dosing considerations for insulin degludenc

A

Can be injected at variable times so could be advantageous in patients with poor adherence

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22
Q

When is it time to consider adding on bolus or meal-time insulin?

A

When fasting glucose is under control but A1C remains greater than goal after 3-6 months of basal insulin

If titration of basal insulin leads to nocturnal hypoglycemia

When basal doses exceed 0.5 U/kg/day

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23
Q

General dosing of adding mealtime insulin before patients largest meal

A

Start with 4, adjust by 2 units every 3 days until CBG within range

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24
Q

What is an insulin sliding scale

A

Catching up

Uses a correction factor which refers to use of additional short or rapid-acting insulin in addition to scheduled insulin doses

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25
Calculating ISF
1500 for regular/TDD 1800 for rapid/TDD Target BG - Actual BG/ISF = # of units needed to correct Usually want to skip or decrease correction dose by 1/2 at bedtime to avoid hypoglycemia
26
Insulin Carbohydrate ratio
In general, approximately 1 unit per 10-15 g CHO 500/TDD = grams of carbs covered
27
Lab values that define normal range (not diabetic)
FPG 70-99 2-hour Plasma Glucose 100-139 A1C 4.5-5.6%
28
Lab values that define pre-diabetes
FPG 100-125 2-hour Plasma Glucose 140-199 A1C 5.6-6.4%
29
Lab values that define diabetes
FPG 126 or higher 2-hour Plasma glucose 200 or higher A1C 6.5% or higher Diagnosis should be confirmed by repeat testing unless RBG 200 or more with overt symptoms of hyperglycemia
30
Gestational diabetes risk factors
Ethnicity (African-American, Native American, Asian), obesity, age over 25, family history of T2DM, signs of insulin resistance (PCOS, lipids), maternal history of gestational diabetes, prior delivery of baby exceeding 9 pounds *screen all with risk factors or at the 24-28 week mark
31
Frequency all adults should be tested for T2DM
All adults 45 or over should be tested every 3 years (if normal)
32
How often is urinary albumin excretion assessed?
Annually
33
Vaccine recommendations in diabetics
Influenza (annually) Pneumococcal (PPSV23 x 1; PPSV23 & PCV12 for those 65 or older) HepB vaccine series recommended for adults 19-59
34
General blood pressure goal in diabetics
under 140/90 130/80 could be used in patients that can handle a stricter goal
35
Lipid management in diabetes
Statin therapy often recommended In adults not taking a statin, check lipid profile at diagnosis and then at least every 5 years When taking a statin, lipids should be checked periodically to assess response to therapy and adherence
36
Therapy recommendation for patient (age >40) with ASCVD who cannot tolerate high-intensity statin therapy
Moderate intensity statin + ezetimibe Also used in those with ACS and LDL of 50 or more (IMPROVE-IT trial)
37
Which STATINs are high-intensity? What are their dosage strengths?
Rosuvastatin 20-40mg | Atorvastatin 40-80mg
38
Recommended anti-platelet therapy in diabetes
Low-dose aspirin (75-162 mg/day) indicated for primary prevention in those with increased CV risk (10-year risk >10%) - includes most men/women 50+ years of age with at least 1 additional risk factor Aspirin not recommended for those with 10-year risk <5% (between 5-10%, use clinical judgement) Use aspirin as a secondary prevention in those with diabetes and a history of ASCVD (clopidogrel 75mg if aspirin allergy) Dual therapy acceptable up to 1 year after ACS
39
Nephropathy treatment recommendations (general)
Assess urinary albumin annually in those with T2DM and in those with T1DM for 5 or more years Optimize glycemic control and BP ACEi or ARB recommended for all with abnormal albuminuria (>29) or eGFR <60
40
Eye exams in T1/T2DM
Done in those with T1 within 5 years of diagnosis, shortly after diagnosis in T2 If no retinopathy, repeat every 2 years; if present, every year
41
Foot exams in diabetes
screen for diabetic peripheral neuropathy annually Feet inspection at every visit
42
Agents for diabetic neuropathy
FDA approved (Duloxetine, Pregabalin, Tapentadol) Off-label (TCAs - amitriptyline, nortriptyline; Gabapentin, Valproate)
43
Minimum recommendation for exercise in diabetic patients
150 minutes or more of moderate physical activity a week (or 75 minutes of vigorous exercise) Recommended to perform resistance training at least twice per week Prolonged sitting should be interrupted every 30 minutes for blood glucose benefits
44
When should metabolic surgery be recommended?
BMI 40+ (regardless of glycemic control) BMI 35-39.9 (glycemic control not adequate) BMI 30-34.9 (poor glycemic control)
45
Medications/drug abuse that could result in DKA
Cocaine, Meth Clozapine, olanzapine, steroids
46
Caloric intake recommendation during sick day to avoid DKA
45 g carbs every 4 hours and drink plenty of fluid
47
Signs/symptoms of DKA
NV, thirst, polyuria, abdominal pain, vision blurring Tachycardia, hypotension, dehydration, warm dry skin, Kussmail respiration, fruity breath, mental status change
48
Describe HHS
Hyperglycemic Hyperosmolar State Usually seen in older individuals with predisposing factors No absolute insulin deficiency so little ketogenesis (hyperglycemia usually worse but little acidosis) Much more dehydration secondary to worsening hyperglycemia
49
Blood glucose level for clinically significant hypoglycemia
< 54 mg/dL
50
Glucose utilization is ___________ during exercise; insulin sensitivity is __________ during/following exercise
Increased Increased
51
Alcohol impairs __________
Gluconeogenesis
52
What hormones/molecules are released when BG drops to 60 mg/dL or lower
Catecholamines Growth hormone and corisol (both antagonize insulin)
53
Contributing factors to hypoglycemia unawareness
Often occurs in those with frequent hypoglycemia Reduction in epinephrine response to low BG, increased expression of glucose transporters in brain (GLUT1, GLUT3), suppression of autonomic responses secondary to cortisol
54
Treatment of hypoglycemia
MILD (rule of 15) - ingest 15 grams of rapid acting carb, re-check in 15 minutes (5 lifesavers, 3-4 glucose tabs, 4 oz juice/soda, 8oz milk, avoid high-fat foods, follow with a snack or small meal within 1-2 hours) SEVERE - glucagon kit (adults = 1.0 mg, children <5 = 0.5 mg, infants = 0.25 mg)
55
Fructosamine levels
Measure of glycated albumin, reflecting the average glucose over 2-3 weeks Indicated for pregnancy and hemoglobinopathies; could be useful in patient with discordant A1C and CBGs Not well standardized and not to be used for diagnosis
56
Benefit of A1C goal
Lowering below or around 7% associated with microvascular complication reduction; if implemented soon after diagnosis, has been reduction in macrovascular disease
57
Factors leading to less stringent A1C goals?
High risk of hypoglycemia or AEs, long-standing disease duration, short life-expectancy, many comorbidities, severe established vascular complications, less motivated patient, limited resources/support
58
Benefit of intensive therapy in diabetes (summary of major clinical trials)
Decrease in microvascular complications (long and short term) CVD reduction long-term, not short Relatively no change in mortality (some increase in mortality - ACCORD trial)
59
How does hypoglycemia increase CVD risk
Cardiac arrhythmias due to abnormal cardiac repolarization Increased thrombotic tendency/decreased thrombolysis CV changes induced by catecholamines (increased HR, silent myocardial ischemia, angina/MI)
60
Metformin advantages
A1C reduction by 1-2% Decrease in micro and macro-vascular complications (UKPDS) Weight neutral Low-cost
61
Metformin contraindications
eGFR <30, hepatic disease, excessive alcohol intake, 80+ y.o., acute illness/major surgery/infection, hypoxic states, dehydration and iodinated constrast media
62
Lactic acidosis signs/symptoms
SOB, muscle aches, weakness, ataxia, altered mental status, palpitations, slurred speech, tachypnea
63
Metformin recommendations based on eGFR
60+ (continue) 45-59 (monitoring every 3-6 months) 30-44 (prescribe with caution, use lower dose such as 50% max, monitor renal function every 3 months, avoid starting in new patients) < 30 (DO NOT START/STOP)
64
Sulfonylurea advantages
Decrease A1C by 1-1.5% Low-cost generics Well-tolerated Decease microvascular complications
65
Sulfonylurea disadvantages
Hypoglycemia (mostly in elderly) - greater risk with glyburide due to active metabolites (medicare won't pay for glyburide as result) Weight gain (1-3 kg) Low durability *glimepiride is the only other 2nd generation with active metabolites but they have minimal activity
66
Glyburide dosing consideration
If CrCl <50 avoid use
67
Sulfonylurea dosing consideration (general)
In general, the max effective dose is about 1/2 of the max approved dose Glipizide 20mg/day (ER 10mg/day) Glimepiride 4mg/day Glyburide 10mg/day
68
Rare ADRs with sulfonylureas
Syndrome of inappropriate Antidiuretic Hormone (SIADH; Chlorpropamide and tolbutamide may increase release of ADH) Disulfiram reactions (chlorpropamide) Hepatotoxicity Hemolytic anemia
69
Meglitinides disadvantages
Frequent dosing schedule Decrease A1C only by 0.5-1% Both agents cleared by liver and metabolized by CYP3A4 (Nateglinide also by 2C9 and inhibits 2C9) - interaction with gemfibrozil, itraconazole (and other 3A4 inhibitors/inducers)
70
If patient skips a meal, the (sulfonylurea/meglitinide) should be skipped
Meglitinide
71
Thiazolidinediones advantages
No hypolgycemia, durable, increase HDL, lower TG, lower CVD
72
Thiazolidinediones disadvantages
Weight gain, edema/HF, bladder cancer, increased risk of fractures, decrease A1C only by 0.5-1.4%
73
Alpha-glucosidase inhibitors disadvantages
Modest efficacy (decrease A1C 0.5-0.9%)
74
Alpha-glucosidase inhibitors contraindications
IBD, intestinal obstruction, GI disorders Cirrhosis of liver Avoid use if Scr > 2mg/dl
75
What to use if patient has low blood sugary while taking alpha-glucosidase inhibitor
Sucrose won't work, must use glucose
76
DPP4 inhibitors MOA
Increase insulin secretion, decrease glucagon secretion by inhibiting DPP4 (which increases postprandial GLP-1,GIP)
77
DPP-4 Inhibitor Disadvantages
Only decrease A1C by 0.5-0.8% High cost Increased risk of pancreatitis (counsel on nausea, vomiting, anorexia and persistent abdominal pain) FDA warning for joint pain (went away with removal of agent) HF risk with saxagliptin and alogliptin All require renal adjustment (except Linagliptin)
78
SGLT2 inhibitors disadvantages
4-7 fold increase in genital mycotic infections, increased risk of UTIs Increased risk of euglycemic ketoacidosis Increased urination, fluid loss Hyperkalemia/serum creatinine bump Relatively modest efficacy (decreases A1c by 0.5-1%) High cost
79
FDA safety alert for Canagliflozin
Bone fractures can occur more frequently (as early as 12 weeks after start)
80
Colesevelam
Bile acid sequestrant (decreases hepatic glucose production, increases incretin levels) Decreases A1C by 0.3-0.4% GI side effects, high cost
81
Bromocriptine
Ergot derived dopamine agonist (modulates hypothalamic regulation of metabolism, increases insulin sensitivity) Decreases A1C by 0.4-0.5% GI side effects, dizziness, nausea, fatigue, rhinitis
82
GLP-1 Agonists advantages
Decrease A1C by 0.5-1.5%, no hypoglycemia, weight reduction through increased satiety, potential beta-cell proliferation/increase in function, CVD benefit (liraglutide)
83
GLP-1 agonists disadvantages
GI side effects, increased risk of pancreatitis, high cost BLACK BOX WARNING (all but byetta) for thyroid-C cell tumors
84
Special considerations for GLP-1 agonist formulations
Albiglutide (requires mixing) Dulaglutide (auto-injector) Exenatide (timing with meals) Exenatide ER (both kit and pen require mixing) Liraglutide (FDA approval for weight loss)
85
Adverse reaction associated with qweek GLP-1 agonists
injection site reaction more common
86
Of GLP-1 agonists an DPP4 inhibitors, which have a higher incidence of SEs?
GLP-1 agonists (have improvement in CV markers though!)
87
Amylin analog MOA
Slows gastric emptying, decreasing glucagon secretion
88
Advantages of Pramlintide
Decrease postprandial glucose, weight loss
89
Disadvantages of Pramlintide
A1C reduction 0.5-1%, GI effects, frequent dosing, increases daily injection burden, potential for hypoglycemia with insulin use, spendy
90
Pramlintide Black Box Warning
Can contribute to episodes of severe hypoglycemia When initiating, prandial insulin dose needs to be reduced by 50% with subsequent re-titration
91
Pramlintide adverse effects
Severe hypoglycemia, nausea, decreased appetite, anorexia, vomiting, headache
92
Pramlintide contraindications
Poor compliance with insulin regimen or with blood glucose monitoring, A1C >9%, recurrent severe hypoglycemia requiring assistance in past 6 months, hypoglycemia unawareness, confirmed gastroparesis, use of drugs that stimulate GI motility, pediatric patients
93
Pramlintide patient education
Refrigerate unopened pens Discard opened pens or vials after 30 days Can NOT be mixed with insulin Inject SubQ in abdomen or thigh Separate pramlintide and insulin injections by at least 2 inches Only take before meals of more than 250 calories (or >30 grams of carbs) Do not take if pre-meal BG is low or if meal contains insufficient carbs or calories
94
Special consideration about appearance of NPH
Cloudy
95
Special consideration about administration of NPH
Can be rolled/mixed (only basal insulin that can be)
96
Afrezza disadvantages
Boxed warning for acute bronchospasm in patients with chronic lung disease Contraindicated in asthma and COPD Not a replacement of long-acting Not recommended for DKA Not recommended for patients who smoke or recently stopped Costly Complicated dosing, expiration and storage
97
How is Afrezza supplied?
4 units, 8 units or 12 units Cartridge loaded into small inhaler

Pharmacy School 2016-17 (22 decks)

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