IontoPatch uses a built-in power source to help move a prescribed, electrically charged medication through intact skin. Once its prepared medication and return chambers contact the skin, the circuit is completed and a low direct current flows. The patch provides the delivery system; the medication provides the intended drug action.
Our IontoPatch STAT, 80, and Extra Strength patches use this wearable approach without an external controller or lead wires. Understanding the mechanism helps explain why the patch can operate without noticeable tingling, why its electrical-dose number is not a medication amount, and why timing depends on the exact model.
We supply the delivery device. The prescribed medication and treatment directions must be arranged separately. An order described as a “dexamethasone patch” should not be mistaken for a patch already containing dexamethasone. Our first-order IontoPatch guide explains what is included and what must be supplied separately.
This is an explanation of medication iontophoresis, not an application protocol or an individual treatment recommendation. Follow the product instructions and your treating clinician's directions.
What activates the patch?
The manufacturer's operating explanation connects three things: prepared chambers, skin contact, and an electrical circuit. A clinician places the appropriate medication in one chamber and prepares the opposite chamber with saline according to the instructions. The skin then forms part of the conducting path.
This is not a passive bandage that releases a preloaded drug simply because it touches the skin. Nor does “wireless” mean that the device has no power source. The technical description identifies electrochemical electrode coatings and, in some designs, an additional integrated battery. There is no user-replaceable battery to charge or install.
On a smaller screen, scroll sideways to read the table.
| Part of the system | Its role | Important distinction |
|---|---|---|
| Medication chamber | Holds the selected ionic medication beside the treatment site. | The drug and its formulation are chosen separately from the patch. |
| Opposite chamber | Holds the instructed saline preparation and helps complete the circuit. | Saline is not the prescribed anti-inflammatory medication. |
| Built-in power system | Supplies electrical energy for iontophoresis. | No external controller does not mean no electrical current. |
| Skin contact and adhesive | Keep the prepared chambers in the intended contact arrangement. | Being firmly attached is not a measurement of drug absorption. |
For electrode chemistry, current-density terminology, and manufacturer test methods, see our IontoPatch technical overview.
For filling, skin preparation, and placement, use our IontoPatch application guide with the instructions supplied in the carton. This explanation is not a substitute for that sequence.
How does electricity move medication through the skin?
An ion is an electrically charged particle. In iontophoresis, an electrode repels an ion carrying the same charge: the positive electrode repels positive ions, and the negative electrode repels negative ions. This electrically driven movement is called electromigration. It helps suitable medication ions move from their reservoir into the skin.
Transport is more complicated than that one rule. Electrically driven fluid movement, called electroosmosis, can also contribute, and diffusion affects movement within tissue. Their contributions depend on the substance and conditions. Laboratory research on electroosmotic flow helps explain the mechanism; it does not establish a treatment result for every drug or patch.
Why the exact medication formulation matters
Dexamethasone sodium phosphate is a negatively charged formulation studied in iontophoresis. Laboratory work on dexamethasone-phosphate transport also shows that other ions in the solution can compete to carry current. A familiar drug name alone is therefore insufficient to confirm a suitable preparation.
The clinician and pharmacist must verify the formulation, polarity, and prescribed instructions. Do not add an ordinary pain cream or change the solution to try to improve conductivity. Our medication and polarity guide explains those distinctions without treating a literature example as a prescription.
What does 80 mA·min actually measure?
Milliamp-minutes measure electrical charge, not milligrams of medication. At a constant current, multiply milliamps by minutes. For a current that changes, the total reflects the current accumulated over the treatment period.
Arithmetic example only: 1 mA for 80 minutes and 2 mA for 40 minutes each equal 80 mA·min. Neither example is an IontoPatch setting or a recommendation for treatment.
That calculation does not reveal how many drug molecules crossed the skin. Research on iontophoretic transport numbers shows how electrical current is shared between different ions. The intended drug is not necessarily carrying all of it.
Keep three quantities separate: liquid volume loaded, electrical charge delivered, and medication absorbed. A specified amount placed in a reservoir is not a measurement of the amount reaching a particular tissue. Matching mA·min values between products does not, by itself, make the medication exposure or treatment plans interchangeable.
Why do STAT, 80, and Extra Strength work over different periods?
The models combine different electrical capacities and delivery profiles. The table explains that relationship; it is not a guide to choosing your own medication dose or removal time.
| Model | Electrical capacity | Stated average period | What the comparison shows |
|---|---|---|---|
| IontoPatch STAT | 80 mA·min | About 4 hours | The same labeled charge as IontoPatch 80 over a shorter average period. |
| IontoPatch 80 | 80 mA·min | About 14 hours | A longer, lower-current delivery profile, not a larger electrical dose than STAT. |
| IontoPatch Extra Strength | 120 mA·min | About 8 hours | Higher labeled electrical capacity, not a prefilled stronger medication. |
Manufacturer specifications reviewed October 13, 2026. The linked model sources describe average wear periods, not guaranteed completion times. Use the exact model and removal instructions selected by the treating professional.
Skin resistance varies, so the current and delivery time can vary too. Longer stated wear does not automatically mean a stronger treatment. For model selection, preparation differences, and box quantities across brands, see our IontoPatch-versus-ACTIVApatch comparison.
How does IontoPatch stop delivering current?
The manufacturer describes reactive electrode coatings that are gradually consumed during use. Their depletion limits further current. This is the basis for the device's electrical-dose capacity, rather than a sensor measuring medication inside the body.
Electrical completion, an empty reservoir, and pain relief are not interchangeable events. Do not assume that residual liquid means a reusable dose remains, or extend wear to try to use every drop. Our wear-time and automatic-shutoff guide addresses the practical removal questions.
Likewise, the absence of a noticeable sensation cannot tell you precisely when delivery began or ended. Use the documented treatment plan, not an assumed change in feeling.
Does drug transport prove the treatment is helping?
No. A delivery mechanism, a measured tissue concentration, and a clinical result answer different questions.
A 2003 study of dexamethasone iontophoresis used a gel model and skin responses in volunteers to investigate delivery and local retention. It did not test clinical efficacy. Its laboratory depth findings should not be converted into a guaranteed penetration depth for every patient.
A separate human microdialysis study measured dexamethasone-related concentrations at different depths. That is evidence about transport under the study conditions, not a promise that a particular patch will resolve a tendon problem.
| Question | Relevant information | What is not enough? |
|---|---|---|
| Is the delivery system prepared correctly? | Correct model, formulation, preparation, and intended skin contact. | The patch feels sticky or looks like the previous one. |
| How much medication entered tissue? | Drug-specific delivery evidence and, in research, appropriate measurements. | The mA·min label or liquid amount alone. |
| Is the treatment meeting its goal? | Clinician assessment of the intended symptom or functional outcome. | Tingling, elapsed time, or the fact that current was delivered. |
Our IontoPatch research guide is the next resource for study designs and clinical outcomes. Keep questions about whether to continue, repeat, or change treatment with the treating professional.
Is IontoPatch the same as TENS or a wired iontophoresis unit?
IontoPatch is a medication-delivery device, not a TENS pad that becomes a drug patch when liquid is added. The U.S. iontophoresis-device definition and labeling requirements address introducing ions of drugs or solutions into the body. A product that supplies electrical stimulation is not automatically intended for that purpose.
A wired system such as our ActivaDose II controller also provides iontophoresis but uses external equipment and separate electrodes. That changes the controls and treatment arrangement, not the need for a clinician-selected drug-and-device combination. Our IontoPatch-versus-wired comparison covers that separate equipment decision.
Questions people ask about the mechanism
Why can't I feel it working?
The manufacturer describes little or no sensation during ordinary IontoPatch use. That does not independently confirm successful delivery. For a loose patch, unexpected behavior, or uncertainty about activation, use our no-tingling and no-light troubleshooting guide and contact the treating professional.
Does the medication stay only under the patch?
No guarantee of exclusively local exposure should be made. Required iontophoresis labeling warns that delivered drugs can reach the bloodstream and cause systemic effects. A local application does not remove medication allergies, contraindications, or other drug-specific risks.
Does Extra Strength mean 50% more absorbed medicine?
Its 120 mA·min rating is 50% higher than an 80 mA·min rating. That arithmetic describes electrical capacity. It does not establish a universal 50% increase in absorbed drug, a stronger formulation, or permission to replace the prescribed model.
Can I refill or recharge the patch?
No. IontoPatch is a disposable, single-use delivery device. It is not a refillable reservoir or a rechargeable controller. Ask the treating professional what to do after an interrupted application rather than reusing the removed patch.
Low current does not eliminate treatment precautions.
Use IontoPatch only as directed for appropriate intact skin and the prescribed medication. Review the supplied warnings, including implanted-device considerations, skin conditions, and MRI restrictions, with the clinician. The label “noninvasive” does not mean that burns, irritation, or medication reactions are impossible.
The manufacturer advises removing the patch and notifying the healthcare provider if unusual discomfort or an abnormal reaction occurs. Do not continue a painful application to finish the nominal dose. Our IontoPatch discomfort guide provides further removal and escalation information.
Understand the mechanism, then confirm the exact order.
IontoPatch combines an electrical delivery system with a separately arranged medication. The useful next step is to confirm the prescribed model and preparation instructions, not choose solely by the longest wear time or largest number.
Review our IontoPatch product page for current models, six-kit box options, and pricing, or browse our iontophoresis patches, controllers, and electrode kits. To check a product reference or what an order contains, contact our team. Medication selection, replacement treatment, and individual dosing remain clinical decisions.
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