Overview of Telfast 120

Quick Facts

Property	Description
Active Ingredient	Fexofenadine Hydrochloride
Form	Film-coated tablet
Pharmacological Class	Second-generation H₁-receptor antagonist
General Purpose	Mitigating histamine-mediated allergic responses
Origin	Synthetic, Piperidine derivative

What Type of Medicine is Telfast 120?

Telfast 120 is a proprietary pharmaceutical preparation categorized as a second-generation antihistamine that is intended for oral, systemic use, delivered as a film-coated tablet. Its essential component is the chemical substance, Fexofenadine Hydrochloride.

Fexofenadine is a highly selective H₁-receptor antagonist, a molecular distinction that determines its primary action of blocking histamine effects at peripheral sites. This preparation is non-sedating because its chemical structure, a synthetic piperidine derivative, minimizes its ability to permeate the central nervous system, which is a key differentiating factor from older compounds.

What is the Composition of Telfast 120?

The tablet is a monotherapy product, meaning it features only the single active substance, Fexofenadine Hydrochloride. The active component is incorporated into the solid oral dosage form alongside standard pharmaceutical excipients to ensure structural integrity and stability. The formulation's specific milligram strength within the tablet is designed to align with common patient groups, and its synthetic origin confirms its targeted pharmacological function.

What is the General Purpose of Fexofenadine?

The overarching purpose of Fexofenadine is to intervene in the physiological responses associated with allergic conditions, which are chiefly mediated by the endogenous chemical, histamine.

It functions as an efficient peripheral H₁-blocker, directly preventing histamine from activating its specific receptors. The mechanism supports long-acting control over the discomfort that arises from these reactions, offering relief for individuals experiencing symptoms of hypersensitivity. The medication is generally useful for mitigating the disruptive physiological effects of histamine release.

Regulatory References

What side effects are possible with Telfast 120?

Possible Side Effects and Safety Information

The safety profile of Fexofenadine Hydrochloride (Telfast 120) is formally established by government regulatory bodies, classifying adverse reactions by frequency and the body system affected.

Frequency-Classified Adverse Reactions

The adverse reactions documented in clinical trials and post-marketing surveillance are categorized as follows:

Classification	Examples of Documented Effects
Common (Reported in ge 1/100 to <1/10)	Headache, Drowsiness, Dizziness, Nausea
Uncommon (Reported in ge 1/1,000 to <1/100)	Fatigue
Frequency Not Known (Post-Marketing)	Insomnia, Sleep disorders, Palpitations, Tachycardia, Diarrhoea, Rash, Urticaria, Pruritus

These effects are grouped into System-Organ Classes, including Nervous System Disorders and Gastrointestinal Disorders.

Serious Adverse Reactions and Safety Considerations

The regulatory profile lists potentially serious, though rare, Immune System Disorders reported after market introduction. These hypersensitivity reactions may include manifestations such as angioedema, chest tightness, dyspnoea (difficulty breathing), and systemic anaphylaxis.

Administration should proceed with care in specific patient populations due to limited data, particularly older adults (elderly) and those with underlying renal impairment or hepatic impairment. The medicine is contraindicated in individuals with a known hypersensitivity to any of its components. Furthermore, patients with a history of cardiovascular disease should be informed of the potential for the class of medicines to be associated with effects like tachycardia and palpitations.

Overdose and Emergency Response

In the event of a suspected overdose with Fexofenadine Hydrochloride, the official regulatory guidance requires immediate action. The regulatory label mandates that individuals get medical help or contact a Poison Control Center right away, a directive that stands even if the person reports only mild effects.

Official Overdose Manifestations and Scope

Feature	Regulatory Documentation Summary
Documented Manifestations	Clinical signs reported in overdose cases primarily include dizziness, drowsiness (or somnolence), dry mouth, and fatigue.
High-Dose Context	Clinical trials involving up to 800 mg single doses did not demonstrate clinically significant adverse events compared to placebo, though the maximum tolerated dose is not established.
Population Note	Elimination half-life may be prolonged in patients with renal impairment.

Emergency Management Protocol

The defined strategy for managing an overdose focuses on symptomatic and supportive treatment. It is officially advised that standard measures to remove any unabsorbed medicinal product should be considered by medical personnel. A critical constraint noted in regulatory documents is that no specific antidote is known for this overdose. Furthermore, regulatory data confirms that hemodialysis has been documented as being ineffective for the removal of the active substance from the blood.

Therapeutic Uses of Telfast 120

What Telfast 120 Treats: Main Uses and Benefits

Telfast 120 (Fexofenadine Hydrochloride) is commonly used to help with symptoms related to physical discomfort, providing supportive relief in situations where additional symptomatic support is needed. Its therapeutic application is relevant in contexts marked by increased discomfort and contributes to easing the overall symptom load for the primary indications of allergic rhinitis and chronic idiopathic urticaria.

The medication may be part of symptomatic management across conditions involving episodic or fluctuating manifestations, such as Seasonal Allergic Rhinitis and Perennial Allergic Rhinitis. It is applied in addressing symptom clusters that may become intense or disruptive, including repetitive sneezing, persistent runny nose, itchiness of the nose, throat, or palate, and watery, itchy eyes. Applied in clinical settings that involve acute or unstable symptom patterns, it contributes to easing the overall symptom load, and supports general well-being during symptomatic phases.

QuickFact Block

Quick Fact: Relief for	Therapeutic Context
Allergic Symptoms	Supports the patient during episodes of heightened discomfort from sneezing and rhinorrhea associated with environmental exposure.
Chronic Itching	Provides supportive relief for the pruritus and wheals seen in Chronic Idiopathic Urticaria.
Functional Stability	Contributes to maintaining functional stability when symptoms interfere with daily functioning.

Regulatory References

NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Eligibility Profile: Who Can and Cannot Use Telfast 120 mg

The eligibility profile for Telfast 120 mg (fexofenadine) is determined strictly by regulatory guidelines, focusing on age, known allergies, and specific health conditions.

Contraindications and Non-Eligibility

Category	Status	Details
Absolute Contraindication	Cannot Use	Known hypersensitivity or allergy to fexofenadine or any of the product's excipients.
Age Restriction	Not Recommended	Children under 12 years of age are not approved for the 120 mg tablet formulation.
Physiological Status	Not Recommended	Pregnancy (unless clearly necessary) and breastfeeding (fexofenadine passes into breast milk).

Populations Requiring Special Consideration

Population Group	Required Action
Renal Impairment	Administer with care and may require dose adjustment due to altered drug elimination.
Elderly Patients (65+)	Administer with care due to limited data and increased likelihood of reduced renal function.
Cardiovascular Disease	Administer with caution; patients should be informed about the low risk of cardiovascular events associated with the drug class.

Official Eligibility: Use is primarily established for adults and adolescents aged 12 years and older who do not have any known contraindications.

What should I know about interactions with other medicines?

The interaction profile of Telfast 120 (Fexofenadine Hydrochloride) is defined primarily by its interaction with drug transport proteins, not the liver's Cytochrome P450 (CYP) enzyme system, which it does not undergo. This leads to specific official constraints on co-administration with other substances.

Official Pharmacokinetic Interactions

Classification	Interacting Agents	Exposure Effect	Mechanism Noted in Label
Increased Exposure	Erythromycin, Ketoconazole	Fexofenadine plasma levels increase mathbf2 to 3 times	Modulated gastrointestinal absorption/secretion via transporters
Decreased Exposure	Aluminum and Magnesium Antacids	Reduced bioavailability and absorption	Binding in the gastrointestinal tract

Administration Constraints and Population Notes

The most significant documented interaction constraints relate to timing and food products:

Antacids (Aluminum/Magnesium): Co-administration with these products requires a separation of at least two hours to prevent a clinically relevant reduction in Fexofenadine absorption.
Fruit Juices: The official regulatory labeling states not to take this medicine with fruit juices (e.g., grapefruit, apple, orange). These juices are documented to reduce absorption by inhibiting uptake transporters (OATP).

Additionally, patients with renal impairment are at risk for significantly increased systemic Fexofenadine exposure due to reduced drug clearance, which is a population-specific consideration noted in official prescribing information.

Mechanism of Action

Selective Blockade of Peripheral H1 Receptors

The primary mechanism involves acting as a highly selective antagonist at the Histamine H1 Receptor ( H1 R), primarily located on peripheral tissues like blood vessels and sensory nerves . By occupying these receptor sites, Fexofenadine prevents the natural mediator histamine from triggering its signaling cascade, which consequently alters the inflammatory process and decreases the physiological consequences of microvascular leakage and sensory nerve stimulation.

Active Exclusion and Peripheral Selectivity

The molecule's unique zwitterionic structure and its interaction as a substrate for the P-glycoprotein ( P-gp) efflux transporter at the Blood-Brain Barrier (BBB) are key mechanistic features . This active exclusion confines the drug's activity almost entirely to the body's periphery. This action prevents H1 R blockade within the central nervous system, thereby avoiding the mechanism associated with central effects.

Modulation of Inflammatory Mediators

Beyond direct receptor blockade, the drug engages mechanisms that contribute to the overall dampening of heightened physiological responses. This includes a targeted ability to modulate the release of other key inflammatory mediators, such as certain chemokines and leukotrienes, from immune cells, which consequently modulates the complex, downstream effects initiated by the allergic reaction cascade.

Dosage and Administration Information

Telfast 120 (Fexofenadine Hydrochloride) is strictly designed for oral administration, typically provided as a film-coated tablet in multiple strengths, including 120 mg and 180 mg. The medicine is generally used according to a once-daily schedule for adults and adolescents aged 12 years and older; however, some regimens for certain indications or regions prescribe 60 mg to be taken twice daily.

Administration Conditions and Adjustments

For proper use, the tablet should be swallowed whole and taken with water. Administration must be kept separate from the consumption of fruit juices such as grapefruit, orange, or apple, as these may interfere with the absorption of the active substance. Furthermore, taking Fexofenadine within two hours of an antacid containing aluminum or magnesium is advised against to prevent reduced uptake.

Usage in Specific Populations

Distinct administration rules exist for specific patient groups. For children between the ages of 6 and 11, the standard regimen for the tablet form is 30 mg taken twice daily. A modification to the usual adult regimen is necessary for patients with renal impairment, where the initial daily dosage is typically reduced to 60 mg. If a scheduled dose is missed, the regular routine should be resumed at the next scheduled time, without taking a double dose to compensate.

Recent Clinical Evidence

Telfast 120: Recent Clinical Evidence

Fexofenadine hydrochloride 120 mg is an established second-generation antihistamine used to relieve symptoms associated with Seasonal Allergic Rhinitis (SAR), commonly known as hay fever. Clinical trials have explored the use of this dose in adults and adolescents aged 12 years and over.

Efficacy in Allergic Rhinitis

Studies examining the 120 mg once-daily dosage have focused on its effect on the total symptom score (TSS) in patients with SAR.

Reduction of Symptoms: Multiple placebo-controlled trials indicated that fexofenadine 120 mg was associated with a reduction in key symptoms, including sneezing, rhinorrhea (runny nose), pruritus (itching of the nose/palate), and itchy/watery/red eyes.
Sustained Effect: Research suggests the 120 mg dosage is sufficient to maintain its observed effect over a 24-hour dosing interval.
Quality of Life: Comparative studies have suggested that fexofenadine 120 mg was associated with an improvement in Rhinoconjunctivitis Quality of Life Questionnaire (RQLQ) scores compared to placebo.

Safety Profile and Tolerability

Clinical data from trials comparing fexofenadine 120 mg to placebo generally found a low incidence of adverse events. The safety profile is a key characteristic of this second-generation compound.

Adverse Event	Incidence in Trials (General Findings)
Headache	Comparable to Placebo
Drowsiness/Fatigue	Low, similar to Placebo
Nausea/Dizziness	Low Incidence

Fexofenadine is known for minimal penetration of the blood-brain barrier, which is associated with a low potential for central nervous system effects, such as sedation, even at doses higher than 120 mg. Post-marketing surveillance reports have included rare occurrences of hypersensitivity reactions, sleep disorders, and tachycardia, though the frequency of these events is not established.

Frequently Asked Questions (FAQ)

Common questions about Telfast 120 (FAQ)

Q: How quickly does Telfast 120 usually start working?

A: Clinical studies have examined the onset of action for this medicine. The results indicate that the product exhibits an antihistaminic effect that starts within one hour after administration, with the maximum observed effect typically occurring around six hours.

Q: How long does the effect of a Telfast 120 tablet last?

A: Official information derived from clinical studies suggests that the active ingredient maintains its observed antihistaminic effect over a 24-hour period. This finding aligns with the general regimen described in product information.

Q: Is Telfast 120 known to cause drowsiness or sleepiness?

A: The medicine is officially classified as a non-sedating antihistamine because it is designed to minimally affect the central nervous system. However, official documents list drowsiness as a common undesirable effect, reported in a small percentage (ge 1/100 to <1/10) of people in clinical trials.

Q: Can Telfast 120 cause stomach upset or nausea?

A: Yes, official regulatory documents list nausea as a common undesirable effect. Furthermore, patient information sometimes references stomach discomfort as a potential gastrointestinal disorder.

Q: What is the difference between Telfast 120 and other allergy pills like Claritin?

A: Official documents classify this medicine as a second-generation H₁-receptor antagonist. This classification indicates its primary action is to selectively block histamine effects in the body's periphery. The medicine is characterized by its minimal ability to penetrate the central nervous system.

Q: Can Telfast 120 be taken with other types of pain relievers?

A: Regulatory guidance provided by government health bodies indicates that this medicine can generally be taken alongside common pain relievers. This may include common pain relievers, as specified in regulatory guidance.

Q: Can Telfast 120 be taken for non-allergy related itchiness?

A: The medicine is primarily indicated for symptoms associated with seasonal allergic rhinitis (hay fever). It is also used for chronic idiopathic urticaria (hives). Official information from some regions notes its use for various types of skin itching, such as that caused by dry skin.

Q: Why is Telfast 120 available without a prescription in some places?

A: The non-prescription (Over-The-Counter or OTC) status in certain regions is the result of a regulatory process known as a 'switch.' This regulatory process involves assessing the drug's safety profile and suitability for being supplied directly to the public.

Q: Is it normal to feel dizzy after taking a Telfast 120 tablet?

A: Dizziness is listed as a common undesirable effect in official regulatory documents. This means that while it is not experienced by everyone, it has been reported by ge 1/100 to <1/10 of people who participated in clinical trials.

Q: Can Telfast 120 be used for reactions other than hay fever, like hives?

A: Yes, in addition to being approved for seasonal allergic rhinitis, the medication is also approved for the treatment of symptoms associated with chronic idiopathic urticaria (hives). Official prescribing information often lists both indications.

Q: What should be done if Telfast 120 doesn't seem to be helping my symptoms?

A: Patient information documents advise that if symptoms worsen or do not show improvement while taking the medication, consulting a healthcare professional is noted in patient information documents.

Q: Are there any reported interactions between Telfast 120 and alcohol?

A: Patient information often includes a statement regarding the avoidance of alcoholic beverages while the medicine is being taken. This is a general caution often noted with medicines that may cause effects like drowsiness.

Q: Is Telfast 120 suitable for people with liver impairment?

A: Due to limited specific data in this patient group, official documents state that this medicine is for use with care in individuals who have hepatic (liver) impairment.

Q: What is the typical time frame for Telfast 120 to clear out of the system?

A: The time frame for the active substance to be eliminated from the body is known as the terminal elimination half-life. Official regulatory review documents indicate this period typically ranges from 11 to 15 hours after multiple doses.

Q: What are the rare but serious side effects listed for Telfast 120?

A: Post-marketing reports list potentially serious signs of severe hypersensitivity reactions. These can include significant effects such as angioedema (swelling) and difficulty breathing, consistent with systemic anaphylaxis.

Q: Can Telfast 120 worsen asthma symptoms?

A: Clinical studies have specifically examined the tolerability of this medicine in study subjects who were also managing asthma. The data from these trials indicated that the medication was generally well tolerated in this group.

Q: Are there different brand names for the same active ingredient as Telfast 120?

A: Yes, the active ingredient in Telfast 120, fexofenadine hydrochloride, is available in other brand-name formulations and as generic versions. The availability varies depending on the specific country or region.

Q: Does taking Telfast 120 for a long period cause any long-term health issues?

A: The safety profile has been examined in clinical trials that studied the medication over periods lasting up to 12 months. In these long-term studies, the medicine was generally noted to be well tolerated by the study subjects.

Q: Is it common for Telfast 120 to cause feelings of tiredness?

A: Official adverse effect reporting uses specific terms: drowsiness is classified as a common effect (reported in ge 1/100 to <1/10), while fatigue is classified as an uncommon effect (reported in ge 1/1,000 to <1/100).

Q: Can Telfast 120 interfere with allergy skin tests?

A: Official clinical protocols often suggest discontinuing the medicine for a specified period, often several days to one week, before the allergy skin test is performed. This is done because antihistamines can interfere with the test results.

Q: Is Telfast 120 considered safe for older adults?

A: Due to limited specific data, official guidelines note that the medicine is for use with care in older adults, defined as those aged 65 years and over. This caution is often related to the possibility of reduced renal function.

Q: Are changes in mood a reported side effect of Telfast 120?

A: Official post-marketing reports that fall under the Psychiatric disorders category have included effects such as insomnia, nervousness, sleep disorders, and nightmares or excessive dreaming.

Q: How is the safety of Telfast 120 monitored after it is released to the public?

A: The safety profile is continuously monitored after release through established regulatory mechanisms. These include ongoing post-marketing surveillance and the requirement for manufacturers to submit regular Periodic Safety Update Reports (PSURs).

Q: Why is 120 mg the standard dose for seasonal allergic rhinitis?

A: The 120 mg once-daily dosage is the strength that has been officially studied and subsequently recommended for the relief of symptoms associated with seasonal allergic rhinitis. This dosage applies to adults and adolescents aged 12 years and over.

How should Telfast 120 be stored and disposed of?

Storage and Disposal of Telfast 120 mg Tablets

The storage of Telfast 120 mg (fexofenadine hydrochloride) tablets is governed by specific regulatory requirements to ensure product stability.

Storage Requirements

Item	Requirement
Temperature & Protection	Store at room temperature, generally below 30 C, away from excess heat, moisture, and sunlight.
Container & Integrity	Keep in the original container, tightly closed, and remain in the blister pack until use.
Child Safety	Must be kept out of the sight and reach of children; safety caps must be locked.

Disposal Instructions

Unused or expired Telfast 120 mg must not be thrown away via household waste or wastewater. Instead, the medication must be returned to a pharmacist or a designated medicine take-back program for safe and environmentally compliant disposal.

Telfast 120