Buying Nexgard for Dogs Without a Prescription?

NexGard contains the active ingredient afoxolaner and belongs to the group of isoxazolines. The product works systemically – that is, after chewing, it distributes throughout the body via the bloodstream and combats fleas and ticks from the inside out.

In Switzerland, Germany and Austria, NexGard is prescription-only. Anyone who buys it without a veterinary prescription is treading on thin ice legally – and taking an unnecessary risk with their own dog.

Why NexGard Requires a Prescription

1. Systemic Action Requires Individual Assessment

Afoxolaner interferes with the nervous system of parasites. Because the active ingredient circulates in the blood, it differs fundamentally from spot-ons or collars that only act externally.

Before a vet prescribes NexGard, they carefully examine:

• Age and exact body weight

• neurological history (e.g., known seizure disorders)

• existing medications the dog is receiving

• general health status

Isoxazolines are associated with documented neurological side effects in sensitive animals – tremor, ataxia, and in rare cases seizures. This does not occur frequently, but it is described in the scientific literature. Precisely for this reason, this decision does not belong in an anonymous online shopping cart.

2. Weight-appropriate dosing is crucial

NexGard is strictly dosed according to weight classes. Sounds simple – but it isn’t always.

• Underdosing → reduced efficacy

• Overdosing → increased risk of side effects

Dog owners surprisingly often underestimate their animal’s actual weight – especially with athletic or slightly overweight dogs, estimates can easily be off by 2–3 kg. With a systemic antiparasitic, this is not a minor detail that you can simply round off.

3. Parasite protection is always a risk assessment

Not every dog needs a systemic preparation year-round. This sounds trivial, but it is often overlooked in everyday life.

What really matters:

• Region of residence (how high is the tick density, are there endemic areas nearby?)

• Travel behaviour (e.g., regular trips to the Mediterranean region)

• Hunting or intensive exposure to woodland areas

• individual sensitivity of the dog

A family dog that walks through the city park daily has a completely different risk profile than a hunting dog in the foothills of the Alps or a dog that accompanies its owner on every trip abroad. Tick protection is not an automatic process that you set up once and then forget – it is part of an individual health concept.

Legal situation in CH / DE / AT

NexGard is subject to the respective veterinary medicinal law – and this is clear-cut in all three countries:

• Switzerland: Therapeutic Products Act (HMG)

• Germany: Veterinary Medicines Act (TAMG) in conjunction with Regulation (EU) 2019/6

• Austria: Veterinary medicinal law

Platforms that offer the product without a prescription check are operating outside these regulations. In addition, there is a concrete practical risk: counterfeit or improperly stored products appear repeatedly in uncontrolled online trade.

How to obtain NexGard safely

1. Veterinary consultation and examination

2. Prescription or direct dispensing at the practice

3. Purchase via a licensed pharmacy or directly from the vet

Anyone using NexGard regularly should also check with their vet at certain intervals whether the preparation remains the most sensible choice – living circumstances and health status of dogs change.

Risks when buying without a prescription

• lack of medical assessment prior to administration

• incorrect dosing due to inaccurate estimation of body weight

• unrecognised contraindications (e.g., history of seizures)

• counterfeit or improperly stored products

• health and product-related risks due to counterfeits or incorrect storage

Conclusion

NexGard works – but only truly well if it is correctly indicated for the respective dog. Using a systemically acting medication without veterinary supervision is both medically and legally risky. This decision belongs in expert hands, not in the shopping cart of an uncontrolled online shop.

Note:

This article does not replace veterinary advice. If your dog shows symptoms such as vomiting, diarrhoea, neurological abnormalities or behavioural changes after administration, please seek a vet practice immediately.