Take the dose out of the patient’s hands
A ladder of concentrations only works if the dose that leaves the bottle is the dose the clinician prescribed. That is a job for an instrument, not for a syringe and a steady hand.
 

The problem with asking patients to measure
Hand a patient an oral syringe and a bottle and you have handed them a laboratory task. Draw to the line. Read the meniscus at eye level. Clear the air bubble. Account for what stays behind in the tip. Do it correctly every day for eleven months, at a slightly different volume every two weeks.
Now consider who is being asked to do it. Patients tapering benzodiazepines and antidepressants commonly have tremor, broken sleep, impaired concentration, heightened anxiety, and — frequently — reading glasses. The population least equipped to perform a precise manual measurement is the population being asked to perform one twice a day, with the highest stakes at the smallest volumes.
The hardware was never designed for this either. Standard oral syringes are specified for the volumes used in pediatric and enteral feeding, not for the tenths of a millilitre a low-dose taper requires. At those volumes, dead space in the tip and ordinary reading error stop being rounding errors and become a meaningful fraction of the dose.
And there is a worse error available. A patient with three concentrations in the refrigerator who draws 0.5 mL from the 20 mg/mL bottle instead of the 0.3 mg/mL bottle has taken sixty-six times the intended dose. Everything about that mistake looks correct: right syringe, right volume, right patient, right day.

 

The ladder makes precision possible. The device is what makes it repeatable.

 

What the device does
The Extalvo dispenser is a countertop instrument. The patient loads the bottle and presses one button. Everything between those two actions belongs to the platform.

It reads the bottle
The device identifies the medication, the concentration, the lot, and the expiry date from the bottle itself. The patient never converts milligrams into millilitres, and the device will not dispense from a bottle that does not match the prescription. The most dangerous error in liquid tapering — the right volume from the wrong concentration — is designed out rather than warned about.

It holds the schedule, so the patient does not have to
The prescriber’s taper schedule is loaded onto the device. On the day a step is due, the dose steps down. There is no new prescription for every reduction, no new syringe marking to learn, and no arithmetic at six in the morning.

It dispenses rather than measures
Dose accuracy comes from a metered pump under closed-loop control, not from a human eye judging a printed line. The same instruction produces the same delivered volume, dose after dose, in the range where manual measurement stops being reliable. The screen shows the dose in milligrams, because that is the number the clinician prescribed and the number the patient understands.

It will not let the patient get it wrong
Doses cannot be doubled, stacked, or taken ahead of schedule. A missed dose is recorded and handled according to the protocol rather than improvised at the kitchen counter.

It keeps a record
Every dispense is timestamped. For the first time in tapering, adherence becomes an observation rather than a question asked six weeks later and answered from memory. That record is the raw material the clinical software works from.

It lets the clinician change course
Hold the current dose. Slow the next step. Go back up a rung for a fortnight. In tapering these are the essential clinical maneuvers — and today each of them means a phone call, a new prescription, and a trip to the pharmacy, which is why they so often do not happen. Here they are a change to a schedule.
 

Built for the medicine it dispenses

• Refrigerated formulations are kept in the conditions the label requires and protected from light, with the remaining volume tracked and low-supply alerts raised before the patient runs out mid-step.

• Tamper-evident bottles and a locked, auditable dispensing record — which matters for the controlled substances in the pipeline, where a complete dispensing history is of direct interest to prescribers, pharmacies, and regulators.

• A deliberate division of labour: the patient’s part is one button, and every demanding step is the instrument’s job.

Where we are
The dispenser is in development and has not been cleared or approved by the FDA. Extalvo is developing it alongside the formulations it delivers.

Extalvo’s products are investigational and have not been approved by the FDA. Nothing on this page is medical advice. Tapering should be undertaken only under the supervision of a prescribing clinician, and benzodiazepines and antidepressants should never be stopped abruptly.