Softin Tablet Uses, Dosage and Side Effects in Pakistan

What Is Softin?

Softin is the brand name for cetirizine hydrochloride, a second-generation antihistamine and one of the most commonly dispensed allergy medicines across Pakistan. Cetirizine was first developed by UCB Pharma in Belgium and received global approval in the early 1990s. It rapidly became one of the world's most prescribed antihistamines due to its effective allergy relief with substantially fewer sedative side effects compared to older first-generation antihistamines like chlorpheniramine and diphenhydramine.

In Pakistan, Softin is manufactured by Sami Pharmaceuticals, one of the country's established pharmaceutical companies. The standard formulation is a 10 mg tablet, though cetirizine is also available as a syrup (5 mg/5 mL) for paediatric use. Softin is just one of several cetirizine brands available across Pakistani pharmacies. Other well-known brands include Zyrtec (UCB Pharma), Zirtec, Cetrizet, and Alergo. All of these contain the same active ingredient — cetirizine hydrochloride — and are therapeutically equivalent. You will find Softin and its equivalents stocked at virtually every pharmacy in Karachi, Lahore, Islamabad, Peshawar, Quetta, and smaller cities alike. It is one of the most affordable medicines available in the country, costing as little as Rs. 2–5 per tablet for generic versions.

Quick Facts

How Does Softin Work?

To understand how Softin works, it helps to understand what happens during an allergic reaction. When your body encounters an allergen — pollen, dust mites, pet dander, or certain foods — your immune system's mast cells release a chemical called histamine. Histamine binds to H1 receptors located in the nose, eyes, skin, and airways, triggering the familiar symptoms: sneezing, itchy and watery eyes, runny nose, nasal congestion, and itchy skin or hives.

Cetirizine is a selective peripheral H1 receptor antagonist. It works by competitively binding to H1 receptors on the surface of cells in the nose, eyes, skin, and respiratory tract, preventing histamine from attaching and triggering the allergic cascade. The word "selective" is important here — cetirizine preferentially targets H1 receptors in the peripheral tissues (nose, skin, eyes) rather than in the brain. This selectivity is what makes it a "second-generation" antihistamine, in contrast to first-generation drugs like chlorpheniramine and diphenhydramine, which cross the blood-brain barrier freely and cause significant drowsiness.

However, cetirizine's selectivity is not absolute. It penetrates the central nervous system (CNS) more than some other second-generation antihistamines, notably fexofenadine (Allegra) and loratadine (Claritin). This is why approximately 14% of cetirizine users experience mild drowsiness — a rate that is clinically meaningful and higher than fexofenadine (which is considered truly non-sedating), but dramatically lower than first-generation antihistamines (which cause drowsiness in 40–60% of users). For most patients, the drowsiness with cetirizine is mild and manageable, especially when the tablet is taken in the evening.

Cetirizine begins to work within 20–60 minutes of oral administration, and its effects last for a full 24 hours, allowing convenient once-daily dosing. It is rapidly absorbed from the gastrointestinal tract, reaching peak blood levels within approximately 1 hour. The drug is minimally metabolised by the liver and is primarily excreted unchanged by the kidneys, which means dose adjustment is needed in patients with significant kidney impairment.

Softin Uses in Pakistan

Allergic Rhinitis (Hay Fever)

Allergic rhinitis is the most common reason Softin is prescribed in Pakistan. This condition is triggered by airborne allergens including pollen (seasonal), house dust mites (perennial and extremely common in Pakistan's climate), animal dander, and mould spores. Symptoms include repeated sneezing, clear watery nasal discharge, nasal congestion, and itchy nose and palate. In Pakistan, where dust levels are high year-round in most cities and air quality frequently deteriorates during crop-burning season and winter smog, allergic rhinitis affects millions of people. Softin effectively reduces sneezing, rhinorrhoea (runny nose), and nasal itching. It is less effective at relieving nasal congestion on its own, for which a short course of a nasal decongestant spray may be combined.

Chronic Urticaria (Hives)

Chronic urticaria — persistent itchy, raised red welts on the skin lasting more than 6 weeks — is one of the strongest indications for cetirizine. Many patients with chronic urticaria in Pakistan are prescribed Softin as first-line therapy. Cetirizine is particularly effective for hives because it has a strong affinity for H1 receptors in the skin. In cases where the standard 10 mg dose is insufficient, dermatologists may prescribe up to 20 mg daily (double the standard dose) under supervision — a practice supported by European Academy of Allergy and Clinical Immunology (EAACI) guidelines for refractory urticaria.

Allergic Conjunctivitis

Allergic conjunctivitis — red, itchy, watery eyes triggered by allergens — is extremely common in Pakistani patients with hay fever. Softin provides systemic relief of ocular itching and tearing. While topical antihistamine eye drops offer faster localised relief, oral cetirizine is preferred when eye symptoms accompany nasal and skin symptoms, as a single tablet addresses all affected areas simultaneously.

Allergic Skin Reactions

Softin is widely used for various allergic skin conditions in Pakistan, including contact dermatitis (allergic reactions from jewellery, detergents, or cosmetics), insect bite reactions, and drug-related skin rashes. While cetirizine does not treat the underlying cause, it effectively controls the itching, redness, and swelling that accompany these reactions, providing significant symptom relief while the underlying trigger is identified and removed.

Softin Dosage Guide

Cetirizine dosing is straightforward, with once-daily administration for all age groups. The tablet can be taken with or without food — food does not significantly affect absorption, though it may slightly delay the onset of action.

Important dosing notes:

• Can be taken with or without food — unlike many medicines, Softin works well on an empty stomach without causing nausea.
• If you experience drowsiness, switch to evening dosing before bedtime. This turns the mild sedative effect into an advantage for sleep.
• Do not exceed 10 mg per day unless specifically instructed by your doctor (dermatologists may prescribe 20 mg for refractory urticaria).
• For children under 6 years, use the syrup formulation for accurate dosing rather than breaking tablets.
• If you miss a dose, take it as soon as you remember. If it is nearly time for your next dose, skip the missed dose — do not double up.
• Avoid alcohol while taking Softin, as alcohol enhances the sedative effect of cetirizine.

Side Effects of Softin

Common Side Effects

Softin is generally well tolerated, but the following side effects are reported in clinical studies:

• Drowsiness / somnolence — occurs in approximately 14% of users at the 10 mg dose. This is the most clinically significant side effect. It is more frequent than with fexofenadine (~2%) or loratadine (~8%), but far less severe than with first-generation antihistamines like chlorpheniramine (~40%). Most patients describe it as mild tiredness rather than the heavy sedation caused by older drugs.
• Dry mouth — reported in about 5% of users. Staying hydrated helps.
• Headache — similar in frequency to placebo in clinical trials, but occasionally reported.
• Fatigue — general tiredness, often related to the mild sedative effect.
• Dizziness — uncommon at standard doses.
• Abdominal discomfort or nausea — rare, and cetirizine is generally easier on the stomach than many other medications.

These side effects are usually mild and often diminish after the first few days of use as the body adjusts. If drowsiness is problematic, switching to evening dosing typically resolves the issue.

Rare but Serious Side Effects

Serious adverse reactions to cetirizine are extremely rare but include:

• Severe allergic reaction (anaphylaxis) to cetirizine itself — paradoxical but documented in very rare cases
• Urinary retention — very rare, more likely in elderly men with pre-existing prostate enlargement
• Elevated liver enzymes — rare, and usually reversible upon discontinuation
• Tachycardia (rapid heartbeat) — very rare at standard doses

If you experience difficulty breathing, swelling of the face or throat, or a rapid heartbeat after taking Softin, stop the medication and seek emergency medical care immediately.

Who Should Avoid Softin

While cetirizine is one of the safest antihistamines available, certain groups require caution or should avoid it entirely:

• Severe kidney disease (CrCl below 10 mL/min or dialysis) — Cetirizine is primarily excreted by the kidneys. In severe renal impairment, the drug accumulates, increasing side effects. Such patients should use cetirizine only under strict nephrology supervision with significant dose reduction.
• Significant liver disease — Though cetirizine undergoes minimal hepatic metabolism, patients with severe liver disease should start at a reduced dose of 5 mg daily and be monitored.
• Elderly patients — Older adults often have reduced kidney function even if their serum creatinine appears normal. Start at 5 mg and monitor for excessive sedation or urinary retention.
• Known hypersensitivity to cetirizine or hydroxyzine — Cetirizine is the active metabolite of hydroxyzine. Patients allergic to either drug should not take Softin.
• Patients requiring high alertness — Pilots, heavy machinery operators, and professional drivers should consider fexofenadine instead, as it has a lower drowsiness risk.
• Pregnancy and breastfeeding — Category B. Discuss with your obstetrician before use. Cetirizine does pass into breast milk in small amounts.

Softin vs Fexofenadine vs Loratadine

Pakistani patients frequently ask their doctors and pharmacists which antihistamine is "best." The truth is that each has specific strengths, and the choice depends on the individual patient's needs.

Summary: Cetirizine (Softin) is often considered the most potent of the three for skin-related allergies, particularly chronic urticaria. Fexofenadine is the best choice when drowsiness must be completely avoided. Loratadine sits in between. For most Pakistani allergy sufferers, the choice comes down to whether drowsiness is a concern and budget considerations — cetirizine is the most affordable option.

Availability and Cost in Pakistan

Softin and generic cetirizine are among the most widely available and affordable medicines in Pakistan. You will find them at every pharmacy chain — Fazal Din & Sons, D.Watson, Shaheen Chemist — as well as small neighbourhood medical stores across all cities, towns, and most rural areas.

Price breakdown (approximate, June 2026):

• Generic cetirizine 10 mg, strip of 10 tablets: Rs. 20–50
• Softin 10 mg (Sami Pharma), strip of 10 tablets: Rs. 40–70
• Zyrtec 10 mg (UCB Pharma), strip of 10 tablets: Rs. 80–120
• Cetirizine syrup 60 mL: Rs. 80–150

Cetirizine is available over-the-counter at most Pakistani pharmacies without a formal prescription, though consulting a doctor before starting any new medication is always advisable. The extremely low cost — as little as Rs. 2–5 per tablet for generic versions — makes it accessible to patients across all income levels, which is a major advantage in a country where out-of-pocket healthcare spending is a significant burden for many families.

Frequently Asked Questions