Insul R40 IU/ml

Insul R is a short-acting (regular) biosynthetic human insulin used to improve glycemic control in patients with diabetes mellitus.

Established / FDA-approved uses

• Type 1 diabetes mellitus - as part of a basal-bolus regimen, usually combined with an intermediate- or long-acting insulin.
• Type 2 diabetes mellitus - when oral antidiabetic agents and/or lifestyle measures fail to achieve adequate glycemic control, either alone or combined with other antidiabetic medicines.

Guideline-supported / hospital uses

• Diabetic ketoacidosis (DKA) and hyperosmolar hyperglycemic state - given intravenously under close medical supervision in a hospital setting.
• Perioperative and inpatient glycemic control - for patients with stress hyperglycemia, during surgery, or acute illness, including sliding-scale or IV infusion protocols.
• Gestational diabetes mellitus - when diet and exercise are insufficient to control blood glucose during pregnancy.

Use of Insul R always requires individualized dosing based on blood glucose monitoring under a physician's supervision.

Insulin Human [Fast-Acting] is biosynthetic human insulin produced by recombinant DNA technology, structurally identical to insulin secreted by the human pancreas.

It is typically supplied as a clear, colorless, aqueous solution for injection at a strength of 100 IU/mL (U-100), available in vials and/or cartridges/pens, depending on the marketed formulation.

Insul R is a short-acting (also called "regular" or "soluble") human insulin. After subcutaneous injection its action begins within approximately 30 minutes, peaks between 2 and 4 hours, and lasts about 6 to 8 hours, though the exact profile varies between individuals.

Because of this relatively fast onset, Insul R is usually injected shortly before a meal to control the post-meal (post-prandial) rise in blood glucose, and can also be given intravenously in hospital settings such as diabetic ketoacidosis.

Antidiabetic agent - Insulin (short-acting/regular human insulin); Insul R belongs to the class of human insulins used for glycemic control in diabetes mellitus.

Mechanism of action: Insulin Human [Fast-Acting] binds to insulin receptors on target tissues (primarily skeletal muscle and adipose tissue), stimulating peripheral glucose uptake and utilization. It also inhibits hepatic glucose production (gluconeogenesis and glycogenolysis) and suppresses lipolysis and proteolysis, while promoting protein and glycogen synthesis. The net effect is a lowering of blood glucose concentration.

Pharmacokinetics

The onset, peak, and duration of Insulin Human [Fast-Acting] can vary based on injection site, dose, blood flow, temperature, and individual patient factors.

Insul R is usually given by subcutaneous injection into the abdomen, thigh, upper arm, or buttock. Injection sites should be rotated systematically within the same body region to reduce the risk of lipodystrophy (lumps or pitting of fat under the skin) and to ensure consistent absorption.

• Inject approximately 30 minutes before a meal unless the physician advises otherwise.
• Do not inject into skin that is bruised, scarred, inflamed, or has lipodystrophy.
• Insul R may also be given intravenously, but only by trained healthcare professionals in a monitored clinical setting (e.g., for diabetic ketoacidosis).
• Do not mix Insul R with insulin products other than as specifically directed by a physician or pharmacist, and always check the appearance of the solution (should be clear and colorless) before use.
• Never share needles, syringes, pens, or insulin vials/cartridges between patients, even if the needle is changed.

Several medicines can affect the blood-glucose-lowering effect of Insul R; dose adjustment and closer glucose monitoring may be needed when these are started or stopped.

Medicines that may increase the risk of hypoglycemia with Insul R

• Other antidiabetic agents (oral or injectable)
• ACE inhibitors and angiotensin II receptor blockers
• Fibrates, salicylates, and sulfonamide antibiotics
• Monoamine oxidase inhibitors (MAOIs)
• Alcohol

Medicines that may reduce the glucose-lowering effect of Insul R

• Corticosteroids, thiazide diuretics, thyroid hormones
• Estrogens and progestogens (e.g., in oral contraceptives)
• Protease inhibitors, some atypical antipsychotics
• Sympathomimetic agents (e.g., epinephrine, salbutamol)

Other important interactions

Beta-blockers, clonidine, and other sympatholytic drugs can blunt or mask the warning signs of hypoglycemia (such as tremor and palpitations), making low blood sugar harder to recognize.

The most common and clinically important adverse reaction with Insul R is hypoglycemia, which can occur with any insulin therapy.

Common

• Hypoglycemia (sweating, tremor, palpitations, hunger, confusion; can be severe and lead to seizures or unconsciousness if untreated)
• Injection site reactions (redness, swelling, itching)
• Lipodystrophy at repeated injection sites
• Weight gain, mild peripheral edema

Less common / serious

• Hypersensitivity reactions, including rare anaphylaxis
• Hypokalemia (low blood potassium)
• Localized cutaneous amyloidosis at injection sites (with repeated use at the same site)

Pregnancy: Human insulin, including Insul R, does not cross the placenta in clinically significant amounts and is generally considered a preferred option for glycemic control during pregnancy when insulin therapy is required, since poorly controlled maternal diabetes carries risks to both mother and fetus. Insulin requirements often change during pregnancy (may decrease in the first trimester and increase later), so Insul R should be used only under close medical supervision, with the dose adjusted by a physician based on frequent blood glucose monitoring.

Lactation: Insul R may be used during breastfeeding under medical supervision; insulin needs may need adjustment during lactation. Mothers should be counseled on monitoring their own blood glucose and watching the infant for any signs of illness, and should consult a physician before use.

Hypoglycemia: As with all insulins, hypoglycemia is the most common and potentially serious risk of Insul R therapy (see Side Effects). Patients and caregivers should be educated to recognize early symptoms (sweating, shakiness, confusion, palpitations) and to treat promptly with fast-acting carbohydrate. Severe, unrecognized hypoglycemia can cause seizures, loss of consciousness, or be life-threatening.

Do not interchange insulin products: Insul R must not be substituted for another insulin product, brand, or concentration without a physician's explicit instruction, as this may require a change in dose.

Individualized, physician-directed dosing: The dose of Insul R must be determined and adjusted by a physician based on regular blood glucose monitoring. Patients should never change their own dose without medical advice.

Injection site rotation: Rotate injection sites within the same body region at each injection to reduce the risk of lipodystrophy and unpredictable absorption.

Hypokalemia: Insul R, particularly when given intravenously, can cause a shift of potassium into cells and lower blood potassium; this is monitored and corrected in hospital settings.

Factors affecting insulin needs: Illness (especially with vomiting or reduced oral intake), physical exercise, changes in diet, and alcohol intake can all significantly change insulin requirements with Insul R; patients should be counseled on adjusting monitoring frequency (not self-adjusting dose) during these situations and to seek medical advice.

Hypersensitivity: Discontinue and seek immediate medical attention if signs of a generalized allergic reaction (rash over the whole body, shortness of breath, wheezing, drop in blood pressure, fast heart rate, or sweating) occur.

Excess doses of Insul R relative to food intake, physical activity, or metabolic need can cause hypoglycemia, and in significant overdose, hypokalemia.

• Mild-to-moderate hypoglycemia can usually be treated promptly with oral glucose or another fast-acting carbohydrate.
• Severe hypoglycemia (with confusion, seizures, or unconsciousness) is a medical emergency - seek immediate medical attention or contact emergency services; treatment typically requires glucagon injection or intravenous glucose administered by trained personnel, with monitoring for hypokalemia.

Do not attempt to manage a severe overdose or unconsciousness at home; always seek urgent professional medical care.

Unopened Insul R (vials, cartridges, or pens): Store refrigerated at 2-8°C. Do not freeze; discard if it has been frozen.

In-use (opened) Insul R: May be kept at room temperature (below 25-30°C, as specified on the product label), away from direct heat and light, and should generally be used within the period stated on the product labeling (commonly around 4 weeks) after opening, then discarded even if some solution remains.

Keep out of reach of children. Do not use if the solution appears cloudy, discolored, or contains particles - it should be clear and colorless.

Renal impairment: Patients with kidney impairment may have reduced insulin clearance and an increased risk of hypoglycemia with Insul R; more frequent blood glucose monitoring and dose adjustment may be required.

Hepatic impairment: Patients with liver impairment may have reduced capacity for gluconeogenesis and an increased risk of hypoglycemia; closer monitoring is advised.

Elderly patients: May be at greater risk of hypoglycemia due to declining renal function, comorbidities, or reduced hypoglycemia awareness; conservative dose titration and close monitoring are recommended.

Pediatric patients: Insul R is approved for use in pediatric patients with diabetes mellitus requiring insulin, with dosing individualized and closely supervised (see Pediatric Uses).

Duration of treatment with Insul R depends on the underlying condition. In type 1 diabetes mellitus, insulin therapy including Insul R is typically lifelong. In type 2 diabetes mellitus, it may be used long-term or added/withdrawn as glycemic control needs change, at the physician's discretion. In hospital settings such as diabetic ketoacidosis or perioperative care, Insul R is used short-term until the acute condition resolves and glycemic control is transitioned to an outpatient regimen. In gestational diabetes, it is typically used only for the duration of the pregnancy, with reassessment postpartum. Treatment duration should always be determined by the treating physician.

Insulins; Antidiabetic agents; Short-acting (regular/soluble) human insulin - Insulin Human [Fast-Acting] is classified within this drug class.

Insulin Human [Fast-Acting] acts by binding to insulin receptors on the surface of target cells (mainly in skeletal muscle, adipose tissue, and liver), triggering intracellular signaling (via the insulin receptor substrate/PI3K pathway) that promotes translocation of GLUT4 glucose transporters to the cell membrane. This increases cellular uptake of glucose, promotes glycogen synthesis, and inhibits hepatic gluconeogenesis and glycogenolysis, thereby lowering blood glucose concentration. It also has anabolic effects, promoting protein synthesis and inhibiting lipolysis and proteolysis.

B (legacy FDA pregnancy category for regular human insulin)

Insul R is indicated for use in pediatric patients with diabetes mellitus requiring insulin therapy. Dosage must be individualized based on the child's metabolic needs, body weight, diet, and activity level, with frequent blood glucose monitoring by a pediatric diabetes care team.

Children and their caregivers should receive thorough education on recognizing and treating hypoglycemia, proper injection technique, and site rotation. Safety and efficacy in very young children should be established and supervised by a pediatrician/endocrinologist, and dosing should never be adjusted by the child or caregiver without medical guidance.