Every authentic box of Combantrin Chocolate Squares has a unique, serialized QR code directly on the packaging. When you scan the QR code using your smartphone camera, your phone instantly connects to our secure verification portal at verify.combantrin.com.

The system immediately confirms genuine product origin, tamper-evident factory release, active lot registration, and authorized chain of custody—ensuring you never receive counterfeit or unauthorized gray-market goods.

We guarantee at least 2 full years (700+ days) of remaining shelf life across all inventory dispatched to customers. Our current supply chain batch (Batch P52111) carries an official certified expiration date of 11/2028.

This extended shelf life ensures maximum anthelmintic potency and gives families peace of mind to keep an extra box ready in their household medicine cabinet for preventive or follow-up use.

Because intestinal parasite treatments are widely sold by unverified third-party resellers on secondary marketplaces, counterfeit or expired inventory can pose real health risks. Our unit-level QR code guarantees that each individual box has been validated from production through temperature-controlled distribution, verifying authentic product integrity before consumption.

The active medicinal ingredient in Combantrin Chocolate Squares is pyrantel embonate, formulated to deliver the equivalent of 100 mg of pyrantel per chocolate square.

Pyrantel embonate is a clinically proven anthelmintic medication recognized worldwide as the gold standard for single-dose pinworm and roundworm treatment.

Pyrantel embonate acts as a depolarizing neuromuscular blocking agent. It paralyzes the worms inside the intestinal tract, causing them to detach from the intestinal wall. Once paralyzed, the worms are painlessly and naturally cleared from the body through standard bowel movements, typically within 24 to 72 hours.

Combantrin Chocolate Squares are specifically indicated for treating:

• Pinworms (also referred to as threadworms — Enterobius vermicularis)
• Roundworms (Ascaris lumbricoides)
• Hookworms (Ancylostoma duodenale and Necator americanus)

Combantrin squares are crafted with real milk chocolate to ensure a pleasant, kid-approved taste without medicinal bitterness. The formulation is gluten-free and contains no artificial colors. It contains milk protein, lactose, sucrose, and soy, and may contain traces of nuts.

Combantrin utilizes a precise, weight-based calculation: one 100 mg chocolate square for every 10 kg (approx. 22 lbs) of body weight, taken as a single dose after a meal:

• 22–55 lbs (10–25 kg): 1 to 2 squares
• 56–99 lbs (26–45 kg): 3 to 4 squares
• 100–123 lbs (46–56 kg): 5 squares
• 124–154 lbs (57–70 kg): 6 squares
• Over 154 lbs (70+ kg): 7 squares

For more detailed calculations, consult our dedicated Dosage Guide.

Pinworms are exceptionally contagious. Microscopic eggs easily transfer through bed linens, towels, clothing, door handles, and classroom environments. Infected individuals can carry worms without exhibiting rectal itching or noticeable symptoms. Treating the entire household at the exact same time breaks the transmission chain and stops endless reinfestation loops.

While pyrantel embonate effectively immobilizes and clears adult worms, it does not destroy unhatched microscopic eggs. Administering a second dose 2 to 4 weeks after the initial treatment ensures that any newly hatched pinworms are eradicated before they mature into egg-laying adults.

You can buy authentic, factory-sealed Combantrin Chocolate Squares directly online at combantrin.com. All orders ship domestically from within the United States, avoiding international customs inspections, cross-border delays, and overseas shipping fees.

All orders receive fast, free standard US shipping. Orders are processed and dispatched either the same or next business day. Typical transit time across the continental US is 3 to 5 business days with live carrier tracking provided.

We provide a hassle-free 30-day money-back guarantee. If you are not completely satisfied with your order, email our US customer support team at [email protected] within 30 days of delivery for a prompt resolution.