insulin therapy in dm

First step into insulin therapy

(How to start insulin in a patient not controlled on OADs)

By Dr.Muhammad Tahir Chaudhry

B.Sc.M.B;B.S(Pb).C.diabetology(USA)

The breakthrough: Toronto 1921 – Banting & Best

Normal physiologic patterns of glucose and insulin secretion in

our body

How Is Insulin Normally Secreted?

The rapid early rise of insulin secretion in response to a meal is critical,

because it ensures the prompt inhibition of endogenous glucose production by the liver

disposal of the mealtime carbohydrate load, thus limiting postprandial glucose excursions.

Basal insulins

NPH

• Humulin N (Eli Lilly)• Insulatard (Novo) (also available as insulatard Novolet pen)• Dongsulin N (Highnoon)• Insuget N (Getz)===========================================

AnalogsGlargine (Lantus) Lantus Solostar Pen (Sanofi Aventis)Detemir (Levimir) by Novo

Basal InsulinsInsulin Type Onset of

actionPeak of action

Duration of action

NPH Intermediate acting

1-2 hours 5-7 hours 13-18 hours

Glargine(Lantus)

Aventis

Long acting

1-2 hours Relatively flat

Upto 24 hours

Detemir(Levimir)Novo

Long acting

2-4 hours 8-12 hours 16-20 hours

The time course of action of any insulin may vary in different individuals, or at different times in the same individual. Because of this variation, time periods indicated here should be considered general guidelines only.

Bolous insulins (Mealtime or prandial)

Human Regular• Humulin R (Eli Lilly)• Actrapid (Novo) (Also available as Actrapid novolet pen)• Dongsulin R (Highnoon)• Insuget R (Getz)==========================================Analogs• Lispro (Humolog) by Eli Lilly• Novorapid by Novo• Aspart• Glulisine (Apidra) by Sanofi Aventis

Bolous insulins (Mealtime or prandial)

Insulin Type Onset of action

Peak of action

Duration of action

Human regular

Short acting 30-60 minutes 2-4 hours 8-10 hours

Insulin analogs

(Lispro,Aspart,Glulisine)

Rapid acting 5-15 minutes 1-2 hours 4-5 hours

The time course of action of any insulin may vary in different individuals, or at different times in the same individual. Because of this variation, time periods indicated here should be considered general guidelines only.

Pre mixed

70/30 (70% N,30% R)

• Humulin 70/30 (Eli Lilly)• Mixtard 30 (Novo) (Also available as Mixtard 30 Novolet Pen)• Dongsulin 70/30 (Highnoon)• Insuget 70/30 (Getz)===================================

Analogs

• Novomix 30 (Novo)• Humolog Mix 25(Lilly)• Humolog Mix 50(Lilly)

Types of InsulinTypes of Insulin

1. Rapid-acting

2. Short-acting

3. Intermediate-acting

4. Premixed

5. Long-acting

6. Extended long-acting

(Analogs)

(Regular)

(NPH)

(70/30)

(Lantus)

Indications for Insulin Use in Type 2 DiabetesPregnancy (preferably prior to pregnancy)

Acute illness requiring hospitalization

Perioperative/intensive care unit setting

Postmyocardial infarction

High-dose glucocorticoid therapy

Inability to tolerate or contraindication to oral antiglycemic agents

Newly diagnosed type 2 diabetes with significantly elevated blood glucose levels (pts with severe symptoms or DKA)

Patient no longer achieving therapeutic goals on combination antiglycemic therapy

InadequateNon pharmacological

therapy

InadequateNon pharmacological

therapy

1oral agent2 oralagents

3 oralagents

Add Insulin Earlier in the AlgorithmAdd Insulin Earlier in the Algorithm

•Severe symptoms

•Severe hyperglycaemia

•Ketosis

•pregnancy

Proposed Algorithm of therapy for Type 2 Diabetes

First step intoInsulin therapy

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What we have in our pockets?

• Basal Insulins (NPH,Lantus)• Bolus Insulins(Human Regular)• Premixed (Human 70/30)

The ADA Recommendations

on the Use of

Insulin

in Type 2 Diabetes

Touch Pad QuestionTouch Pad Question

Currently, roughly ____ of my patients with type Currently, roughly ____ of my patients with type 2 diabetes are taking some form of insulin.2 diabetes are taking some form of insulin.

1. >80%

2. 60-80%

3. 40-60%

4. 20-40%

5. 0-20%

Touch Pad QuestionTouch Pad Question

When it comes to first-line insulin, I tend to prescribe:

1. An intermediate-acting insulin with fast-acting insulin as needed

2. A long-acting or extended long-acting insulin with fast-acting insulin as needed

3.A premixed insulin

Advantages of Insulin TherapyAdvantages of Insulin Therapy

• Oldest of the currently available medications, has the most clinical experience

• Most effective of the diabetes medications in lowering glycemia

– Can decrease any level of elevated HbA1c

– No maximum dose of insulin beyond which a therapeutic effect will not occur

• Beneficial effects on triglyceride and HDL cholesterol levels

Nathan DM et al. Diabetes Care 2006;29(8):1963-72.

Disadvantages of Insulin TherapyDisadvantages of Insulin Therapy

• Weight gain ~ 2-4 kg

– May adversely affect cardiovascular health

• Hypoglycemia

– However, rates of severe hypoglycemia in patients with type 2 diabetes are low…

Type 1 DM: 61 events per 100 patient-yearsType 1 DM: 61 events per 100 patient-years

Type 2 DM: 1-3 events per 100 patient-yearsType 2 DM: 1-3 events per 100 patient-years


Balancing Good Glycemic Control with Balancing Good Glycemic Control with a Low Risk of Hypoglycemia… a Low Risk of Hypoglycemia…

Hypoglycemia

Glycemic control

Rates of Hypoglycemia for Premixed Rates of Hypoglycemia for Premixed vs. Long-Acting Insulin + OADvs. Long-Acting Insulin + OAD

Adapted from Janka et al. Diabetes Care 2005;28:254-9.

Mean number of confirmed hypoglycemic events per patient-year in a 28-week study

0

1

2

3

4

5

6

Symptomatic Nocturnal Severe

Premixed insulin

Insulin glargine + OADs

5.73

2.62

1.040.51

0.05 0.00

Eve

nts

per

pat

ien

t-ye

ar

p=0.0009

p=0.0449 p=0.0702

Rates of Hypoglycemia for Premixed Rates of Hypoglycemia for Premixed vs. Long-Acting Insulin + OAD in Elderly Patientsvs. Long-Acting Insulin + OAD in Elderly Patients

Adapted from Janka HU et al. J Am Geriatr Soc 2007;55(2):182-8.

Rat

e o

f ev

ent

per

pat

ien

t-ye

ar

p=0.01

p=0.008

p=0.06

0

2

4

6

8

10

12Premixed (n=63)Glargine + OAD (n=69)

All episodes ofhypoglycemia

All confirmedepisodes of

hypoglycemia

Confirmedsymptomatichypoglycemia

The ADA Treatment The ADA Treatment Algorithm for the Initiation Algorithm for the Initiation

and Adjustment of Insulinand Adjustment of Insulin

Initiating and Adjusting InsulinInitiating and Adjusting Insulin

Continue regimen; check HbA1c every 3 months

If fasting BG in target range, check BG before lunch, dinner, and bed. Depending on BG results, add second injection

(can usually begin with ~4 units and adjust by 2 units every 3 days until BG in range)

Recheck pre-meal BG levels and if out of range, may need to add another injection; if HbA1c continues to be out of range, check 2-hr postprandial levels

and adjust preprandial rapid-acting insulin

If HbA1c ≤7%...

Bedtime intermediate-acting insulin, or bedtime or morning long-acting insulin

(initiate with 10 units or 0.2 units per kg)

Check FG and increase dose until in target range.

If HbA1c 7%...

Hypoglycemia or FG >3.89 mmol/l (70 mg/dl):

Reduce bedtime dose by ≥4 units(or 10% if dose >60 units)

Pre-lunch BG out of range: add rapid-acting insulin at breakfast

Pre-dinner BG out of range: add NPH insulin at breakfast or rapid-acting insulin at lunch

Pre-bed BG out of range: add rapid-acting insulin at dinner


Target range: 3.89-7.22 mmol/L (70-130 mg/dL)

Nathan DM et al. Diabetes Care. 2006;29(8):1963-72.

If HbA1c ≤7%... If HbA1c 7%...

Step One…






If HbA1c ≤7%...




If HbA1c 7%...

Hypoglycemia

or FG >3.89 mmol/l (70 mg/dl): Reduce bedtime dose by ≥4 units

(or 10% if dose >60 units)








Step One: Initiating InsulinStep One: Initiating Insulin• Start with either…

– Bedtime intermediate-acting insulin or

– Bedtime or morning long-acting insulin

Insulin regimens should be designed taking lifestyle and meal schedules into account


Step One: Initiating InsulinStep One: Initiating Insulin, cont’d, cont’d

• Check fasting glucose and increase dose until in target range– Target range: 3.89-7.22 mmol/l (70-130 mg/dl)

– Typical dose increase is 2 units every 3 days, but if fasting glucose >10 mmol/l (>180 mg/dl), can increase by large increments (e.g., 4 units every 3 days)


• If hypoglycemia occurs or if fasting glucose < 3.89 mmol/l (70 mg/dl)…– Reduce bedtime dose by ≥4 units or 10%

if dose >60 units

Step One: Initiating InsulinStep One: Initiating Insulin, cont’d, cont’d


Reduction in overnight and fasting glucose levels achieved by adding basal insulin may be sufficient to reduce postprandial elevations in glucose during the day and facilitate the achievement of target A1C concentrations.

While using basal insulin alone,never stop or reduce ongoing oral therapy

• If HbA1c is <7%...

– Continue regimen and check HbA1c every 3 months

• If HbA1c is ≥7%...

– Move to Step Two…

After 2-3 Months…After 2-3 Months…


With the addition of basal insulin and titration to target FBG levels, only about 60% of patients with type 2 diabetes are able to achieve A1C goals < 7%.[36] In the remaining patients with A1C levels above goal regardless of adequate fasting glucose levels, postprandial blood glucose levels are likely elevated.






If HbA1c ≤7%...




If HbA1c 7%...









Step Two…


Step Two: Intensifying InsulinStep Two: Intensifying InsulinIf fasting blood glucose levels are in target range but HbA1c ≥7%, check blood glucose before lunch, dinner, and bed and add a second injection:

• If pre-lunch blood glucose is out of range,

add rapid-acting insulin at breakfast

• If pre-dinner blood glucose is out of range,

add NPH insulin at breakfast or rapid-acting insulin at lunch

• If pre-bed blood glucose is out of range,

add rapid-acting insulin at dinner


Making AdjustmentsMaking Adjustments

• Can usually begin with ~4 units and adjust by 2 units every 3 days until blood glucose is in range


When number of insulin Injections increase from 1-2………..Stop or taper of insulin secretagogues (sulfonylureas).

• If HbA1c is <7%...

– Continue regimen and check HbA1c every 3 months

• If HbA1c is ≥7%...

– Move to Step Three…

After 2-3 Months…After 2-3 Months…








If HbA1c ≤7%...




If HbA1c 7%...









Step Three…

Step Three: Step Three: Further Intensifying InsulinFurther Intensifying Insulin

• Recheck pre-meal blood glucose and if out of range, may need to add a third injection

• If HbA1c is still ≥ 7%

– Check 2-hr postprandial levels

– Adjust preprandial rapid-acting insulin


Premixed InsulinPremixed Insulin

• Not recommended during dose adjustment

• Can be used before breakfast and/or dinner if the proportion of rapid- and intermediate-acting insulin is similar to the fixed proportions available


Key Take-Home MessagesKey Take-Home Messages• Insulin is the oldest, most studied, and most effective

antihyperglycemic agent, but can cause weight gain (2-4 kg) and hypoglycemia

• Insulin analogues with longer, non-peaking profiles may decrease the risk of hypoglycemia compared with NPH insulin

• Premixed insulin is not recommended during dose adjustment

Key Take-Home Messages, cont’dKey Take-Home Messages, cont’d

• When initiating insulin, start with bedtime intermediate-acting insulin, or bedtime or morning long-acting insulin

• After 2-3 months, if FBG levels are in target range but HbA1c ≥7%, check BG before lunch, dinner, and bed,and, depending on the results, add 2nd injection (stop sulfonylureas here)

• After 2-3 months, if pre-meal BG out of range, may need to add a 3rd injection; if HbA1c is still ≥7% check 2-hr postprandial levels and adjust preprandial rapid-acting insulin.

Regimen # 2

First calculate total daily dose of insulin

Body weight in kgs / 2

• e.g; an 80 kg person will require roughly about

40 units / day.

Dose calculation……..contdSplit the total calculated dose into 4 (four) equal s/c

injections. – ¼ of total dose as regular insulin s/c half-hour

( ½ hr ) before the three main meals with 6 hrs gap in between.

– ¼ total calculated dose as NPH insulin s/c at 11:00 p.m. with no food to follow.

Dose calculation: example

For example in an 80-kg diabetic requiring 40 units per day, start with:

• 08:00 a.m. --- 10 units regular insulin s/c ½ hr before breakfast.

• 02:00 p.m. --- 10 units regular insulin s/c ½ hr before lunch.

• 08:00 p.m. --- 10 units regular insulin s/c ½ hr before dinner.

• 11:00 p.m. --- 10 units NPH/ lantus insulin s/c

Dose adjustment

• For adjustment of dosage, check fasting blood sugar the next day and adjust the dose of night time NPH Insulin accordingly i.e. keep on increasing the dose of NPH by approximately 2 units daily until you achieve a normal fasting blood glucose level of 80-110 mg/dl.

Control BSF by adjusting Control BSF by adjusting

the prior the dose of NPHthe prior the dose of NPH

Dose adjustment…contd.• Once the fasting blood glucose has been

controlled, check 6-Point blood sugar as follows:

– Fasting. – 2 hours after breakfast. – Before lunch (and noon insulin) – 2 hours after lunch. – Before dinner (AND EVENING INSULIN)– 2 hours after dinner

Control random sugar level Control random sugar level by adjusting the prior dose by adjusting the prior dose

of regular insulinof regular insulin

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Dose adjustment…contd.

• Now control any raised random reading by adjusting the dose of previously administered regular insulin.

• For example: a high post lunch reading will NOT be controlled by increasing the dose of next insulin (as in sliding scale), rather adjustment of the pre-lunch regular insulin on the next day will bring down raised reading to the required levels.

Examples

• For the following profile:

– Blood sugar fasting = 180 mg/dl

– Blood sugar after breakfast = 250 mg/dl.

– Blood sugar pre lunch = 190 mg/dl

– Blood sugar post lunch 270 = mg/dl

– Blood sugar pre dinner = 200 mg/dl

– Blood sugar post dinner 260 = mg/dl

• We need to increase the dose of NPH at night to bring down baseline sugar level (BSF) to around 100 mg/dl after which the profile should automatically adjust as follows: – Blood sugar fasting = 100

mg/dl – Blood sugar 02 hrs after

breakfast = 170 mg/dl – Blood sugar pre-lunch = 110

mg/dl – Blood sugar 2 hrs. after lunch

= 190 mg/dl– Blood sugar pre-dinner = 120

mg/dl – Blood sugar 2 hrs. post dinner

= 180 mg/dl

Examples……contd.• Blood sugar fasting = 130 mg/dl • Blood sugar after breakfast = 160 mg/dl• Blood sugar pre-lunch = 130 mg/dl • Blood sugar post lunch = 240 mg/dl• Blood sugar pre-dinner = 180 mg/dl • Blood sugar 2 hrs. post dinner = 200 mg/dl

• This patient needs adjustment of pre-lunch regular Insulin which will bring down post lunch and pre dinner readings within normal limits.

• 2 hrs post dinner blood sugar(200 mg/dl) will be brought down by adjusting pre dinner regular insulin.

Combinations

• In types 2 subjects, once the blood sugar profile is normalized and the patient is not under any stress, the total daily dose (morning + noon + night + NPH at 11 p.m) may be divided into two 12 hourly injections of premixed Insulin

Examples….contd.• e.g-1; If a patient is

stabilized on • 10U R + 12U R +

10U R + 12U NPH;• then he may be

shifted to• 44/2 = 22 units of

70/30 Insulin 12 hourly s/c ½ hr before meal.

• e.g-2; If the adjusted Insulin is

• 14U R+16U R+12U R+8U NPH,

• then split the total dose:

30 U 70/30 before breakfast and 20U 70/30 before dinner to compensate for the high morning and lunch Insulin.

Combinations………contd.

• Problem: Remember that BD dosing usually fails to cover lunch, especially if it is heavy. So:

• Always check for post lunch hyperglycemia when using this regimen.

• Solution:1. Patients can be advised to take their lunch (heavier

meal) at breakfast; and breakfast (lighter meal) at lunch. 2. Adding Glucobay with lunch some times provides a

reasonable control. 3. An alternate combination to overcome the problem is

regular insulin for morning and noon, with premixed insulin at night.

Example • 10U R before breakfast + 12U

R before lunch + 22U 70/30 before dinner.

• Insulin will be injected exactly 6 hrs apart as in the QID regimen.

Choice of regimens

1. R+ R+ R+ L****2. R+ R+ R+ N ***3. R+ R+ premixed insulin**4. BD premixed insulins*

Regimen # 3

(Pre mixed)

How to start pre mixed (70/30) Insulin

For pre mixed insulins(70/30 preparations)

Step1:First calculate the total daily starting requirement of insulin;

body weight(kg)/2

eg, For a 60kg patient,total daily dose =30 units

Step 2:Then devide this dose into 3 equal parts;

10+10+10

Step 3:Give 2 parts in the morning and 1 part in the evening;

Morning=20U Evening=10 U

Dose titration of Pre-mixed(70/30) preparations

You can increase or decrease the dose of pre-mixed insulin by 10 % i.e

If the patients is using,

1-10 units…………….+/- 1 unit

11-20 units……………+/- 2 units

21-30 units……………+/- 3 units

31-40 units……………+/- 4 units…………………..

Advantages and disadvantages of premixed insulins

Advantages:Easy to administer for the physician.

Easy to fill and inject by the patient.

Provides both basal and bolus coverage with fewer number of injections.

Disadvantage:

No dose flexability

If u increase/decrease the dose of one component ,the dose of other component is also changed un desirably

How to solve the problem of dosage flexibility

Regimen # 4

Disadvantage of split- mixed regimen

Mid-night hypoglycemia

How to solve the problem of nocturnal hypoglycemia

Somogyi phenomenon• Due to

– excess dose of night time insulin, or– Night insulin taken early

• Peaks at 3:00 a.m: hypoglycemia• Counter regulatory hormones released in excess:• Resulting in over correction of hypoglycemia:• Fasting hyperglycemia• Solution:

– Check BSL AT 3 :00 a.m– Give long acting at 11:00 p.m so peak comes later– Reduce dose of night time insulin

Dawn phenomenon • Growth hormone surge at dawn raises insulin

requirement. • Night time insulin taken early, fades out before

dawn. • Fasting hyperglycemia

Solution• Give long acting insulin not before 11 :00 p.m• May need to increase dose of night time insulin

More physiologic regimens

Remember • Insulin

– No miracle drug– Has definite indicationsAs delivery route follows reverse physiology:– Good control is achieved only if residual

pancreatic function is preserved to a certain extent i-e:

–Starting insulin on time is vital(Concept of early insulinization)

Pearls for practice

Never try to control diabetes with oral hypoglycemic drugs / insulin without first ensuring strict diet control.

Always bring fasting sugar to normal before trying to control post prandial / random blood sugar.

Control any underlying infection/stressful condition vigorously.

Keep meal timings regular with 6 hrs between the three meals.

Do not inject NPH before 11 p.m. Keep number of calories during the meals same from day

to day. The quantity and quality of diet should be same at same timings.

Do not use sliding scale to calculate the dose of insulin. Use proper technique to inject s/c insulin. Ensure proper storage of insulin.

Common Problems

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Problems can be avoided

• Adherence to time table is all that is required to avoid problems:– Regular meals– Regular injections– Regular excercise

Choosing an Insulin with a Choosing an Insulin with a Lower Risk of Lower Risk of

HypoglycemiaHypoglycemia

• Insulin analogues with longer, non-peaking profiles may decrease the risk of hypoglycemia…


Injection Techniques

Sites of injection• Arms • Legs • Buttocks

• Abdomen

Sites of injection…….contd.

• Preferred site of injection is the abdominal wall due to

• Easy access – Ample subcutaneous tissue

• Absorption is not affected by exercise.

Injection technique

Technique • Tight skin fold• Spirit…. X• Appropriate needle size • 90 degree angle • Change site to avoid lipodystrophy

Injection technique…….contd.

INSTRUCTIONS:Keep the needle perpendicular to skin in order to avoid variability in absorption (fig-A) Insert needle upto the hilt (fig-A)Distribute daily injections over a wide area to avoid lipodystrophy and other local complications (fig-B)

Storage

• Injections: refrigerate

• Pens: do not refrigerate

Shelf life• One month

once opened

Thank you all For

Sparing your valuable time

&

Patient listening

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insulin therapy in dm

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