Preflut F

Uses

Asthma: This fixed-dose combination of Fluticasone Propionate and Formoterol Fumarate is used for the regular treatment of asthma where the use of a combination product (an inhaled corticosteroid and a long-acting ß2 agonist) is appropriate:

• For patients not adequately controlled with inhaled corticosteroids and "as required" inhaled short-acting ß2 agonist. Or,
• For patients already adequately controlled on both an inhaled corticosteroid and a long-acting ß2 agonist.

Preflut F is also used to associated treatment for these conditions: Allergic Rhinitis (AR), Allergy to Mold, Allergy; Dander, Asthma, Bacterial Sinusitis, Chronic Bronchitis, Chronic Obstructive Pulmonary Disease (COPD), Chronic Sinusitis, Dermatitis, Emphysema, House Dust Mite Allergy, House dust allergy, Itching of the nose, Nasal Congestion, Nonallergic Rhinitis, Oesophagitis, Eosinophilic, Perennial Rhinitis, Pollen Allergy, Rhinitis, Rhinorrhoea, Seasonal Allergic Rhinitis, Sneezing, Moderate, severe Perennial Allergic Rhinitis (PAR), Moderate, severe Seasonal Allergic RhinitisAsthma, Bronchial Asthma, Bronchoconstriction, Chronic Obstructive Pulmonary Disease (COPD), Exercise-Induced Bronchospasm, Moderate to Severe COPD

How Preflut F works

Fluticasone propionate works through an unknown mechanism to affect the action of various cell types and mediators of inflammation. Fluticasone propionate activates glucocorticoid receptors and inhibits lung eosinophilia in rats.

Formoterol is a relatively selective long-acting agonist of beta₂-adrenergic receptors, although it does carry some degree of activity at beta₁ and beta₃ receptors. Beta₂ receptors are found predominantly in bronchial smooth muscle (with a relatively minor amount found in cardiac tissue) whereas beta₁ receptors are the predominant adrenergic receptors found in the heart - for this reason, selectivity for beta₂ receptors is desirable in the treatment of pulmonary diseases such as COPD and asthma. Formoterol has demonstrated an approximately 200-fold greater activity at beta₂ receptors over beta₁ receptors.

On a molecular level, activation of beta receptors by agonists like formoterol stimulates intracellular adenylyl cyclase, an enzyme responsible for the conversion of ATP to cyclic AMP (cAMP). The increased levels of cAMP in bronchial smooth muscle tissue result in relaxation of these muscles and subsequent dilation of the airways, as well as inhibition of the release of hypersensitivity mediators (e.g. histamine, leukotrienes) from culprit cells, especially mast cells.

Dosage

Preflut F dosage

Patients will need to be trained on the use of the inhaler and their asthma should be regularly reassessed by a doctor, so that the strength of this inhaler they are receiving remains optimal and is only changed on medical advice. The dose should be titrated to the lowest dose at which effective control of symptoms is maintained.

Patients should be given the strength of this inhaler containing the appropriate Fluticasone Propionate dosage for the severity of their disease.

Asthma:
Fluticasone Propionate 125 mcg & Formoterol Fumarate 5 mcg inhaler only

• The recommended dose for adults and adolescents aged 12 years and above: Two inhalations (puffs) twice daily normally taken in the morning and in the evening.
• For adults only: The total daily dose can be further increased if asthma still remains poorly controlled by administering the highest strength of this combination product- i.e. Fluticasone Propionate 250 mcg & Formoterol Fumarate 10 mcg inhaler- two inhalations (puffs) twice daily. This highest strength is for use in adults only; it should not be used in adolescents aged 12 years and above.
• Children under 12 years: No data are available for this strength of this inhaler in children.
• This inhaler in any strength is not recommended for use in children less than 12 years of age.

• The recommended dose for adults: Fluticasone Propionate 250 mcg & Formoterol Fumarate 10 mcg inhaler- two inhalations (puffs) twice daily normally taken in the morning and in the evening.
• Adolescents under 18 years and children: No data are available for this strength of this inhaler in children or adolescents. This inhaler in any strength is not recommended for use in children less than 12 years of age.
• This inhaler 250 microgram/10 microgram per actuation should not be used in adolescents.

Using an Inhaler seems simple, but most patients do not know how to use it in the right way. If the Inhaler is used in the wrong way, less medicine can reach the lungs. Correct and regular use of the Inhaler will prevent or lessen the severity of asthma attacks.

Following simple steps can help to use Inhaler effectively (According to "National Asthma Guidelines for Medical Practitioners" published by Asthma Association):

1. Take off the cap.
2. Shake the inhaler (at least six times) vigorously before each use.
3. If the inhaler is new or if it has not been used for a week or more, shake it well and release one puff into the air to make sure that it works.
4. Breathe out as full as comfortably possible & hold the inhaler upright.
5. Place the actuator into mouth between the teeth and close lips around the mouthpiece.
6. While breathing deeply and slowly through the mouth, press down firmly add fully on the canister to release medicine.
7. Remove the inhaler from mouth. Continue holding breath for at least for 10 seconds or as long as it is comfortable.
8. If doctor has prescribed more than one inhalation per treatment, wait 1 minute between puffs (inhalations). Shake the inhaler well and repeat steps 4 to 7.
9. After use, replace the cap on the mouthpiece. After each treatment, rinse mouth with water.
10. Check your technique in front of a mirror from time to time, if you see a white mist during the inhalation, you may not have closed your lips properly around mouthpiece, or you may not be breathing in as you press the can. This indicates failure of technique. If this happens, repeat the procedure from step 4 carefully.

Side Effects

Undesirable effects which have been associated with this inhaler during clinical development are given in the table below, listed by system organ class. The following frequency categories form the basis for classification of the undesirable effects as: very common (≥1/10), common (≥1/100 and <1/10), uncommon (≥1/1,000 and <1/100), rare (≥1/10,000 < 1/1,000), very rare (<1/10,000) and not known (cannot be estimated from the available data). Within each frequency grouping, undesirable effects are presented in order of decreasing seriousness.

Toxicity

Fluticasone propionate's use in specific populations has not been well studied. Fluticasone propionate is not carcinogenic, mutagenic, or clastogenic, nor did it affect fertility in animal studies. Subcutaneous fluticasone propionate has been shown to produce teratogenic effects in rats though oral administration does not. Generally, there are no reported adverse effects with fluticasone in pregnancy. Fluticasone propionate in human milk may cause growth suppression, effects on endogenous corticosteroid production, or other effects. Pediatric patients treated with fluticasone propionate ointment experienced adrenal suppression. Geriatric patients treated with fluticasone propionate did not show any difference in safety or efficacy compared to other patient groups, though older patients may be more sensitive to adverse effects. There is no difference in the clearance of fluticasone propionate across genders or race. Patients with hepatic impairment should be closely monitored due to the elimination mechanism.

The oral LD₅₀ in rats is 3130 mg/kg.

Symptoms of overdose are likely consistent with formoterol's adverse effect profile (i.e. consistent with excessive beta-adrenergic stimulation) and may include angina, hyper or hypotension, tachycardia, arrhythmia, nervousness, headache, tremor, seizures, dry mouth, etc. Patients may experience laboratory abnormalities including hypokalemia, hyperglycemia, and metabolic acidosis. Treatment of overdosage should consist of symptomatic and supportive therapy, with a particular focus on cardiac monitoring. Consider the use of a cardioselective beta-adrenergic blocker to oppose excessive adrenergic stimulation if clinically appropriate.

Precaution

Thyrotoxicosis; severe CV disorders e.g. ischaemic heart disease, tachyarrhythmias or severe heart burn; prolonged QT-interval. DM; pregnancy; lactation; children, do not initiate or increase the dose during an exacerbation. May produce paradoxical bronchospasm.

Interaction

No formal drug interaction studies have been performed with this inhaler. Fluticasone Propionate, an individual component of this inhaler, is a substrate of CYP 3A4. The effects of short-term co-administration of strong CYP 3A4 inhibitors (e.g. Ritonavir, Atazanavir, Clarithromycin, Indinavir, Itraconazole, Nelfinavir, Saquinavir, Ketoconazole, Telithromycin) together with this inhaler is of minor clinical relevance, but caution needs to be taken in long-term treatment and co-administration with such drugs should be avoided if possible.

Volume of Distribution

The volume of distribution of intravenous fluticasone propionate is 4.2L/kg. A study of 24 healthy Caucasian males showed a volume of distribution at steady state of 577L following intravenous administration.

Elimination Route

Intranasal bioavailability of fluticasone propionate is 10. Intranasal exposure results in the majority of the dose being swallowed. Topical absorption of fluticasone propionate is very low but can change depending on a number of factors including integrity of the skin and the presence of inflammation or disease. A study of 24 healthy Caucasian males showed an inhaled bioavailability of 9.0%.

The pulmonary bioavailability of formoterol has been estimated to be about 43% of the delivered dose, while the total systemic bioavailability is approximately 60% of the delivered dose (as systemic bioavailability accounts for absorption in the gut).

Formoterol is rapidly absorbed into plasma following inhalation. In healthy adults, formoterol T_max ranged from 0.167 to 0.5 hours. Following a single dose of 10 mcg, C_max and AUC were 22 pmol/L and 81 pmol.h/L, respectively. In asthmatic adult patients, T_max ranged from 0.58 to 1.97 hours. Following single-dose administration of 10mcg, C_max and AUC_0-12h were 22 pmol/L and 125 pmol.h/L, respectively; following multiple-dose administration of 10 mcg, C_max and AUC_0-12h were 41 pmol/L and 226 pmol.h/L, respectively. Absorption appears to be proportional to dose across standard dosing ranges.

Half Life

7.8 hours for intravenous fluticasone propionate. A study of 24 healthy Caucasian males shows a half life of 14.0 hours following intravenous administration and 10.8 hours following inhalation.

The average terminal elimination half-life of formoterol following inhalation is 7-10 hours, depending on the formulation given. The plasma half-life of formoterol has been estimated to be 3.4 hours following oral administration and 1.7-2.3 hours following inhalation.

Clearance

1093mL/min for fluticasone propionate. A study of 24 healthy Caucasian males showed a clearance of 63.9L/h following intravenous administration.

Renal clearance of formoterol following inhalation is approximately 157 mL/min.

Elimination Route

Fluticasone propionate is mainly eliminated in the feces with 10,5.

Elimination differs depending on the route and formulation administered. Following oral administration in 2 healthy subjects, approximately 59-62% and 32-34% of an administered dose was eliminated in the urine and feces, respectively. Another study which attempted to mimic inhalation via combined intravenous/oral administration noted approximately 62% of the administered dose in the urine and 24% in the feces. Following inhalation in patients with asthma, approximately 10% and 15-18% of the administered dose was excreted in urine as unchanged parent drug and direct formoterol glucuronides, respectively, and corresponding values in patients with COPD were 7% and 6-9%, respectively.

Pregnancy & Breastfeeding use

Pregnancy: There are limited data on the use of Fluticasone Propionate and FormoterolFumarate, either administered alone or together but administered from separate inhalers, or on the use of this fixed-dose combination, this inhaler in pregnant women. Studies in animals have shown reproductive toxicity. Administration of this inhaler is not recommended during pregnancy, and should only be considered if expected benefit to the mother is greater than any possible risk to the fetus. If this is the case, then the lowest effective dose needed to maintain adequate asthma control should be used.

Breastfeeding: It is not known whether Fluticasone Propionate or FormoterolFumarateare excreted in human breast milk. Therefore, a decision must be made whether to discontinue breastfeeding or to discontinue/abstain from this inhaler therapy taking into account the benefit of breastfeeding for the child and the benefit of therapy for the woman.

Fertility: There are no data available on effects on fertility following administration of this inhaler. In animal studies, no effects on fertility have been seen following administration of the individual active substances at clinically relevant doses.

Contraindication

this inhaler should not be used to treat acute asthma symptoms for which a fast and short-acting bronchodilator is required. Patients should be advised to have their medicine to be used for relief in an acute asthma attack available at all times.

The prophylactic use of this inhaler in exercise-induced asthma has not been studied. For such use, a separate rapid-acting bronchodilator should be considered. Patients should be reminded to take their this inhaler maintenance dose as prescribed, even when asymptomatic. Patients should not be initiated on this inhaler during an exacerbation, or if they have significantly worsening or acutely deteriorating asthma. Serious asthma-related adverse events and exacerbations may occur during treatment with this inhaler. Patients should be asked to continue treatment but to seek medical advice if asthma symptoms remain uncontrolled or worsen after initiation on this inhaler.

This inhaler should not be used as the first treatment for asthma.

This inhaler should be administered with caution in patients with pulmonary tuberculosis, quiescent tuberculosis or patients with fungal, viral or other infections of the airway. This inhaler should be used with caution in patients with thyrotoxicosis, phaeochromocytoma, diabetes mellitus, uncorrected hypokalaemia or patients predisposed to low levels of serum potassium, hypertrophic obstructive cardiomyopathy, idiopathic subvalvular aortic stenosis, severe hypertension, aneurysm or other severe cardiovascular disorders, such as ischaemic heart disease, cardiac arrhythmias or severe heart failure. Caution must be observed when treating patients with existing prolongation of the QTc interval. Formoterol itself may induce prolongation of the QTc interval.

As for all ß2 agonists, additional blood sugar controls should be considered in diabetic patients. As with other inhalation therapy paradoxical bronchospasm may occur with an immediate increase in wheezing and shortness of breath after dosing. This inhaler should be discontinued immediately, the patient assessed and alternative therapy instituted if necessary.

Systemic effects may occur with any inhaled corticosteroid, particularly at high doses prescribed for long periods. These effects are much less likely to occur than with oral corticosteroids. Possible systemic effects include Cushing’s syndrome, Cushingoid features, adrenal suppression, growth retardation in children and adolescents, decrease in bone mineral density, cataract glaucoma and more rarely, a range of psychological or behavioural effects including psychomotor hyperactivity, sleep disorders, anxiety, depression or aggression (particularly in children). It is important, therefore, that the patient is reviewed regularly and the dose of inhaled corticosteroid is reduced to the lowest dose at which effective control of asthma is maintained.

Acute Overdose

There are no data available from clinical trials on overdose with this inhaler, however, data on overdose with both single drugs are given below:

FormoterolFumarate: An overdose of Formoterol would likely lead to an exaggeration of effects that are typical for ß2 agonists; in which case the following adverse experiences may occur: angina, hypertension or hypotension, palpitations, tachycardia, arrhythmia, prolonged QTc interval, headache, tremor, nervousness, muscle cramps, dry mouth, insomnia, fatigue, malaise, seizures, metabolic acidosis, hypokalaemia, hyperglycaemia, nausea and vomiting.

Fluticasone Propionate: Acute overdose with Fluticasone Propionate usually does not constitute a clinical problem. The only harmful effect after inhalation of a large amount of the drug over a short period is suppression of hypothalamic pituitary adrenocortical (HPA) axis function. HPA axis function usually recovers in a few days, as verified by plasma cortisol measurements. Treatment with the inhaled corticosteroid should be continued at the recommended dose to control asthma.

Storage Condition

Store in a cool and dry place, protected from light.

Innovators Monograph

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