Why time matters more than the pill size
That 10 mg alprazolam is already dissolving in your terrier's stomach — absorption starts within minutes, not hours. For a 7 kg dog, this dose can cause significant central nervous system depression. The clock is ticking faster than with foods or plants because medications are designed for rapid uptake.
Check his gums now — if they're pale or bluish instead of bubblegum pink, his oxygenation may already be dropping. Pinch the skin between his shoulder blades; slow retraction could indicate dehydration from panting, a common early reaction.
The specific risks for compact breeds
Terriers often have faster metabolisms than larger dogs, which might seem protective but actually speeds drug distribution. His small vascular system can't dilute the alprazolam effectively, letting it reach his brain quicker. Shallow breathing (less than one full breath every three seconds) warrants immediate emergency care.
Don't mistake stillness for safety — some dogs become so sedated they can't lift their heads but remain conscious and terrified. If his eyelids look halfway closed despite being awake, that's a drug effect, not relaxation.
What to tell the vet when you call
Have the medication bottle ready — they'll need the exact name (alprazolam vs. similar-sounding drugs), strength (10 mg), and whether it's extended-release. Time of ingestion matters more than you think; if it was within the last 30 minutes, the clinic may act differently than if it's been two hours.
Note any preexisting conditions, especially if he's on other medications. Certain combinations (like alprazolam with antihistamines) can multiply the depressant effects dangerously. Even supplements like melatonin or CBD oil could interact.
Why monitoring isn't enough
Unlike some toxins where you can watch and wait, benzodiazepines often require active treatment. Your vet may administer flumazenil to reverse the effects, but this must be carefully dosed — too much can trigger seizures. Home observation risks missing the window for effective intervention.
His size means complications like slowed breathing can escalate rapidly. What looks like peaceful sleep could actually be respiratory depression. Err on the side of urgency — better an unnecessary trip than a preventable tragedy.
The step-by-step response, from the first minute to the vet visit, is in our Human Stress and Anxiety Medication Poisoning in Dogs and Cats emergency guide.