Dilbro UniCap Inhalation Capsule 110 mcg+50 mcg

Uses

Bronchodilator treatment to relieve symptoms in patients with chronic obstructive pulmonary disease (COPD).

Dilbro UniCap Inhalation Capsule 110 mcg+50 mcg is also used to associated treatment for these conditions: Airway Obstruction, Chronic Obstructive Pulmonary Disease (COPD), Increased upper airway secretion, Peptic Ulcer, Primary Axillary Hyperhidrosis, Sialorrhea (Excessive Drooling), Cardiac vagal inhibitory reflexes, Cardiac vagal inhibitory reflexes caused by General Surgery, Cardiac vagal inhibitory reflexes caused by Medication, Gastric secretions, Peripheral muscarinic effectsAsthma, Chronic Obstructive Pulmonary Disease (COPD), Maintenance

How Dilbro UniCap Inhalation Capsule 110 mcg+50 mcg works

Glycopyrronium is a muscarinic antagonist with the highest affinity for M1 receptors, followed by M3, M2/M4, and M5.

Muscarinic receptors M1 to M4 are found in the lung, although M3 is predominantly responsible for bronchoconstriction and airway secretions. Secretions from salivary and sweat glands, as well as gastric acid secretions, are also predominantly mediated by the M3 receptor. Salivary and gastric acid secretions are also partially mediated by the M1 receptor. Antagonism of these receptors decreases the volume of their respective secretions, and in the case of the gastrointestinal system, reduces the acidity of the stomach.

In the cardiovascular system, muscarinic receptors M1 to M5 are all present, however the function of M5 has not been described in literature. Under normal circumstances, stimulation of the vagal nerve lowers the heart rate, potentially leading to intraoperative bradycardia. Studies in mice suggest that this stimulation is predominantly mediated by the M3 receptor, and mutant knockout mice are not susceptible to these effects.

Indacaterol works by stimulating adrenergic beta-2 receptors in the smooth muscle of the airways. This causes relaxation of the muscle, thereby increasing the diameter of the airways, which become constricted in asthma and COPD. It is also long acting due to its high affinity to the lipid raft domains in the airway membrane so it slowly dissociates from the receptors. Indacaterol also has a high intrinsic efficacy so it is also very rapid acting - onset of action occurs within 5 minutes.

The pharmacological effects of beta2-adrenoceptor agonist drugs, including indacaterol, are at least in part attributable to stimulation of intracellular adenyl cyclase, the enzyme that catalyzes the conversion of adenosine triphosphate (ATP) to cyclic-3’, 5’-adenosine monophosphate (cyclic monophosphate). Increased cyclic AMP levels cause relaxation of bronchial smooth muscle. In vitro studies have shown that indacaterol has more than 24-fold greater agonist activity at beta2-receptors compared to beta1-receptors and 20-fold greater agonist activity compared to beta3-receptors. This selectivity profile is similar to formoterol. The clinical significance of these findings is unknown.

Dosage

Dilbro UniCap Inhalation Capsule 110 mcg+50 mcg dosage

The recommeded Dose isOne capsule once daily. Indacaterol & Glycopyrronium Breezhaler is recommended to be administered at the same time of the day each day. If a dose is missed, it should be taken as soon as possible on the same day. Patients should be instructed not to take >1 dose in a day.

For inhalation use only. The capsules must not be swallowed.

Side Effects

Nasopharyngitis (4.1%), Hypertension (2%), Back pain (1.8%), Oropharyngeal pain (1.6%)

Toxicity

Patients presenting with an overdose typically present with flushing, hyperthermia, tachycardia, ileus, urinary retention, loss of ocular accommodation, light sensitivity, mydriasis, nausea, vomiting, dizziness, light headedness, and obstipation. Patients should be treated with symptomatic and supportive therapy, which may include the use of catheters for urinary retention, cardiovascular support, airway maintenance, ventilation, or neostigmine.

The oral LD₅₀ in mice is 570 mg/kg, and in rats is 709 mg/kg. The intraperitoneal LD₅₀ in mice is 90 mg/kg, and in rats is 196 mg/kg.

The expected signs and symptoms associated with overdosage of indacaterol are those of excessive beta-adrenergic stimulation and occurrence or exaggeration of any of the signs and symptoms, e.g., angina, hypertension or hypotension, tachycardia, with rates up to 200 bpm, arrhythmias, nervousness, headache, tremor, dry mouth, palpitation, muscle cramps, nausea, dizziness, fatigue, malaise, hypokalemia, hyperglycemia, metabolic acidosis and insomnia. As with all inhaled sympathomimetic medications, cardiac arrest and even death may be associated with an overdose of indacaterol.

Precaution

Concomitant use with long-acting beta-agonists or long-acting muscarinic antagonists. Not for the treatment of asthma. Immediately discontinue use if hypersensitivity & paradoxical bronchospasm occurs. Narrow-angle glaucoma, urinary retention, CV disorders (CAD, acute Ml, cardiac arrhythmia, HTN), convulsive disorders or thyrotoxicosis, severe renal impairment; hypokalaemia; hyperglycaemia. Pregnancy & lactation.

Interaction

Although no formal drug interaction studies have been performed, Glycopyrronium inhalation powder has been used concomitantly with other drugs, commonly used in the treatment of COPD, including sympathomimetic bronchodilators, methylxanthines, oral and inhaled steroids without clinical evidence of drug interactions.

Indacaterol shows interaction with Adrenergic Drugs, Xanthine Derivatives, Steroids, or Diuretics. Concomitant treatment with xanthine derivatives, steroids, or diuretics may potentiate any hypokalemic effect of Indacaterol. The ECG changes or hypokalemia that may result from the administration of non-potassium sparing diuretics (such as loop or thiazide diuretics) can be acutely worsened by β2-agonists. Indacaterol, as with other β2-agonists, should be administered with extreme caution to patients being treated with monoamine oxidase inhibitors, tricyclic antidepressants, or other drugs known to prolong the QTc interval. β-adrenergic receptor antagonists (beta-blockers) and Indacaterol may interfere with the effect of each other when administered concurrently.

Volume of Distribution

The mean volume of distribution in patients aged 1-14 years old is 1.3-1.8 L/kg, with a range of 0.7-3.9 L/kg. The volume of distribution in adults aged 60-75 years is 0.42 ± 0.22 L/kg.

After intravenous infusion the volume of distribution (Vz) of indacaterol was 2,361 L to 2,557 L indicating an extensive distribution.

Elimination Route

In adults, a 66 mg topical dose of glycopyrronium reaches a C_max of 0.08 ± 0.04 ng/mL, with a T_max of 1 hour, and an AUC_0-24 of 0.88 ± 0.57 h*ng/mL.

Inhaled glycopyrronium is approximately 40% bioavailable. A 25 µg inhaled solution reaches a C_max of 34.5 pg/mL, with a T_max of 0-inf of 255 h*pg/mL.

An 8 µg/kg intramuscular dose reaches a C_max of 3.47 ± 1.48 µg/L, with a T_max of 27.48 ± 6.12 minutes, and an AUC of 6.64 ± 2.33 h*g/L.

Oral glycopyrronium has highly variable pharmacokinetics, reaching a mean C_max of 0.318 ng/mL, a T_max of 3.1 hours, and an AUC_0-24 of 1.74 h*ng/mL.

The median time to reach peak serum concentrations of indacaterol was approximately 15 minutes after single or repeated inhaled doses. Absolute bioavailability of indacaterol after an inhaled dose was on average 43-45%.

Half Life

The half life after inhalation is approximately 33-53 hours. The mean half life of a 6 µg/kg intravenous dose is 0.83 ± 0.27 hours. The mean half life of oral glycopyrronium is 3.0 hours.

Indacaterol serum concentrations declined in a multi-phasic manner with an average terminal half-life ranging from 45.5 to 126 hours. The effective half-life, calculated from the accumulation of indacaterol after repeated dosing with once daily doses between 75 mcg and 600 mcg ranged from 40 to 56 hours which is consistent with the observed time-to-steady state of approximately 12-15 days.

Clearance

A 6 µg/kg intravenous dose has a clearance of 0.54 ± 0.14 L/kg/h. An oral solution has a clearance of 5.28-38.95 L/h/kg in healthy adults and 8.07-25.65 L/h/kg in patients with cerebral palsy.

Renal clearance of indacaterol is, on average, between 0.46 and 1.2 L/h. Serum clearance of indacaterol is 18.8 L/h to 23.3 L/h.

Elimination Route

85% of an intravenous dose was recovered in the urine, with 12 >80% of the recovered dose is the unchanged parent drug. The remainder is recovered as the inactive M9 metabolite.

Renal clearance plays a minor role (about 2 to 6% of systemic clearance) in the elimination of systemically available indacaterol. In a human ADME study where indacaterol was given orally, the fecal route of excretion was dominant over the urinary route. Indacaterol was excreted into human feces primarily as unchanged parent drug (54% of the dose) and, to a lesser extent, hydroxylated indacaterol metabolites (23% of the dose).

Pregnancy & Breastfeeding use

Pregnancy Category- Not Classified. FDA has not yet classified the drug into a specified pregnancy category.

Contraindication

Hypersensitivity to indacaterol, glycopyrronium or to any of the excipients of Indacaterol & Glycopyrronium. All LABAs are contraindicated in patients with asthma without use of a long-term asthma control medication Indacaterol or glycopyrrolate is not indicated for the treatment of asthma Use in children: This should not be used in patients <18 years.

Special Warning

Renal Impairment: This can be used at the recommended dose in patients with mild to moderate renal impairment. In patients with severe renal impairment or end-stage renal disease requiring dialysis it should be used only if the expected benefit outweighs the potential risk.

Hepatic Impairment: This can be used at the recommended dose in patients with mild and moderate hepatic impairment. There are no data available for the use of Dilbro UniCap Inhalation Capsule 110 mcg+50 mcg Breezhaler in patients with severe hepatic impairment, therefore caution should be observed in these patients.

Elderly: Indacaterol & Glycopyrronium Breezhaler can be used at the recommended dose in elderly patients

Acute Overdose

High doses of Glycopyrronium may lead to anticholinergic signs and symptoms. However, there were no systemic anticholinergic adverse effects following a single inhaled dose of up to 150 micrograms Glycopyrronium in healthy volunteers.

The expected signs and symptoms associated with over dosage of Indacaterol powder are those of excessive beta-adrenergic stimulation and occurrence or exaggeration of any of the signs and symptoms, e.g., angina, hypertension or hypotension, tachycardia, with rates up to 200 bpm, arrhythmias, nervousness, headache, tremor, dry mouth, palpitation, muscle cramps, nausea, dizziness, fatigue, malaise, hypokalemia, hyperglycemia, metabolic acidosis and insomnia. As with all inhaled sympathomimetic medications, cardiac arrest and even death may be associated with an over dose of Indacaterol powder.

Storage Condition

Should be stored at temperature not exceeding 25ºC but do not freeze. Should be stored in cool and dry place, protected from light.

Indacaterol capsules must always be stored in the blister, and only removed immediately before use. Keep in a cool & dry place. Keep out of the reach of children.

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