Hydra Pen Review (H2 and H3)

The Hydra Pen is a Dr. Pen product, and its selling point is also its main risk. Each cartridge carries a small reservoir of serum that flows out through the cartridge head while the needles puncture the skin, so whatever you load goes into freshly opened channels. Neither the H2 nor the H3 has FDA clearance, both are shallow pens that stop at 1.0 mm, and the H3 costs $149.90 at drpenofficial.com with 12-pin cartridges at $49.90 for ten. Because the line is sold under the Dr. Pen brand, Health Canada’s 2021 advisory against “all models” of Dr. Pen pens applies to it. This review scores the H3 and notes where the H2 differs. It is based on documented evidence: nobody at this site has used the device.

Who makes the Hydra Pen

Guangzhou Ekai Electronic Technology Co., Ltd., the company that makes Dr. Pen pens and holds the FDA clearance for the Dr. Pen A20. Its Alibaba storefront lists “Derma Pen, Derma Roller, Hydra Pen” among its main categories and carries a “Hydra.pen H3” listing. Ekai’s own site sells the newest model as the “Dr.pen H6 Multifunction Beauty Pen” with “Brand: Dr Pen” in its parameter table. Dr. Pen US says the same thing in its own words: “the Hydra Pen H6 is now the Dr. Pen H6 Advanced Serum Infusion Microneedling Pen! As part of our brand refresh, we’ve updated the name and look”.

Hydrapen.com is not a shop. It is a single “Anti-counterfeit Verification” page with a box for an authentication number, and a commented-out line in its code points to a Dr. Pen domain.

Which models are still sold?

The line runs H2, H3, H5 and H6. On October 6, 2026:

• Dr. Pen US (us.drpen.co) sells the H6 pen at $349 and lists no H2, H3 or H5 pen. Its two H3 cartridge packs show as unavailable, and its H5 cartridges are in stock with no H5 pen to fit them.
• Ekai’s own product list names the H6, M9 and Bio 6, and no other Hydra model.
• drpenofficial.com (operated by “DR PEN LIMITED, a company registered in Hong Kong”) sells the H3 at $149.90, the H5 at $199 to $239 and the H6 at $299.
• drpenofficial.store (a Hong Kong address, and it calls itself “an authorised Dr. Pen retailer”) sells the H2 and H3 at $139 each, down from $195 and $199.

No seller or manufacturer page says the H2 or H3 is discontinued, so that is unverified. Both are still easy to buy, which is why this review scores the H3 rather than the H6.

Health Canada’s advisory covers the whole Dr. Pen brand

On December 16, 2021, Health Canada published “Advisory – Dr. pen microneedling devices are not authorized for sale and may pose health risks”. It covers the “Dr. pen Auto Microneedle System. All models, including but not limited to, A1, A6, A7, A6S, E30, M5, M7, M8, N2 and X5, and Ultima versions.” No Hydra model is named, but the advisory’s “all models” wording covers them, and Dr. Pen US now sells the H6 under the Dr. Pen name.

Health Canada has since licensed some Dr. Pen products. Licence 114618, a class II “MICRONEEDLING SYSTEM” first issued January 6, 2026 with no end date, lists four device identifiers: A20, A9, DP-MC9 and H14. None is an H2, H3, H5 or H6. The advisory tells consumers: “Do not use or buy unauthorized Dr. pen microneedling pens and cartridges.”

FDA status

No Hydra Pen has a 510(k). An openFDA search for “hydra pen” returns no clearance and no adverse-event report; the 510(k) database’s “hydra” results include contact lenses, gym equipment and an X-ray system, and no microneedling device. Our FDA lookup page lists the Hydra Pen H2 and H3 as not cleared. The one cleared Dr. Pen device is the A20 (K230420), a prescription pen for facial acne scars, and that clearance does not extend to other models (clearance versus approval explains the difference).

The sellers do not all describe this honestly. The about page at drpenofficial.com, which sells the H3, says “our FDA-approved devices safely stimulate your skin’s natural collagen”. A third store, drpenusa.net, repeats “FDA-Cleared Technology” down its H3 page. Dr. Pen US’s H6 page ends with “In accordance with FDA authorisation, microneedling pens are intended for use by individuals aged 22 years and older”, a line that borrows wording from the A20’s clearance for a pen that has none.

The serum reservoir: what goes in, and where it ends up

This is the part of the design that matters most. Every Hydra cartridge pairs the needles with a refillable chamber that holds up to 3 ml. drpenofficial.com describes the H3 as “delivering your favorite vitamins and hydrating essences directly through the cartridge system”, with “a 3-level adjustable outflow control”. Its instructions say to “Pour your desired skincare serum or essence into the refillable liquid container capsule.”

Microneedling opens channels, and products applied while they are open can be carried below the surface. The published case reports of facial granulomas after microneedling mostly involve a vitamin C serum worked in during the procedure. A 2014 JAMA Dermatology report described patients whose patch tests reacted to the serum, and a 2025 systematic review found 15 patients across 13 studies, most involving a motorized pen and topical vitamin C. Our aftercare and topicals guide covers that evidence and its limits. The relevant point here is timing: in the reports that state it, the product went on before or during needling. A reservoir pen makes during-needling application the normal way to use it.

None of the sellers says what should go in the chamber, beyond consistency. drpenofficial.store’s cartridge page answers “Can I put a thicker serum, a cream or a skin booster in the cartridge?” with “Thickness is the thing to think about rather than whether a product is allowed”, and ends: “Whatever you load, use a product intended for topical cosmetic use and patch test first.”

The serums sold alongside the pens are no different. Dr. Pen US offers the Medisco Skinbooster, a $259 box of “8ml × 10 vials” whose ingredient list runs from water and niacinamide to “Sodium DNA” and “Disodium EDTA”, and says that any opened vial “should be stored in the refrigerator and used within up to 2 weeks”. That is a multi-use cosmetic, and the listing does not call it sterile. drpenofficial.store sells “Meso Secret” hyaluronic acid boosters and says microneedling lets them “penetrate deeper dermal layers”. The pen pages also undercut themselves on what the reservoir does: the drpenofficial.store H3 page calls the pen a device for “Micro Needle Mesotherapy”, while the same store’s cartridge page says “nothing is injected” and “It is not mesotherapy”.

Sterile cartridges, unsterile handling

Sellers disagree on whether the cartridge is ready to use. Dr. Pen US says its cartridges “arrive in individually sealed, sterile pouches, sterilised with ethylene oxide gas and UV light”, with alcohol “entirely optional”. drpenofficial.com’s H3 instructions tell you to “Sterilize the brand-new, sealed needle cartridge in a 75% alcohol solution for 5-10 minutes”, and then to pour a non-sterile serum into it. An alcohol soak followed by an open pour from a cosmetic bottle is not a sterile process, whatever the pouch said.

Backflow, where liquid runs back toward the motor, matters more on a pen that runs liquid through its tip. drpenofficial.store says its H3 and H5 cartridges are “built to keep serum moving forwards rather than drawing it back up into the barrel”, then has an FAQ titled “The cartridge pulls serum back up instead of pushing it out — what is wrong?” Dr. Pen US says the newer H6’s chip-linked cartridge prevents “reverse flow”. No test of either claim has been published.

Specs: H3 and H2

	Hydra Pen H3	Hydra Pen H2
Depth	“Adjustable needle length: 0 – 1.0mm” (drpenofficial.com)	Fixed per cartridge: 0.25, 0.5 or 1.0 mm (drpenofficial.store cartridge page)
Speed	“6 Speeds”; “Up to 18000 RPM” (drpenofficial.store)	“4-Speed Control System”
Serum flow	“3-level adjustable outflow control”; “infusion amount up to 3ML”	“Integrated serum delivery system”
Power	Wireless, “can be used in charging mode with cable”	Wireless, with a cable option
Cartridges	12-pin, round nano (HR), square nano (HS); 24- and 36-pin listed as H3/H5	12-pin, Nano-HS, Nano-HR
Needle	Not stated by drpenofficial.com; drpenusa.net says “0.18mm titanium”	“30-gauge acupuncture needles”
In the box	Pen, “2* 12 Pin Hydra Cartridges”, adapter, charger, cable, manual (drpenofficial.store)	Pen, adapter and cable, “2* 12pins cartridges”, manual
Price	$149.90 (drpenofficial.com); $139 (drpenofficial.store)	$139 (drpenofficial.store)

The H2’s own listing contradicts its cartridges. The pen page promises “Adjustable Needle Depth” with “adjustable needle lengths (0.25mm/0.5mm/1.0mm)”. The cartridge page from the same store says “the pen has no depth dial” and that “Depth is decided by which cartridge you fit”. So an H2 owner who wants two depths in one session needs two cartridges. The inventory figure of $89 to $167 that circulates for these pens was not found on any seller page checked here.

Both pens stop at 1.0 mm. That suits serum application and superficial work, and is well short of the 2.5 mm dial on the same maker’s M8. The H6 goes to 2.0 mm, but Ekai labels it “Professional Use Only” and “not designed for personal or non-professional use”.

What owners say

The independent record is thin. A PubMed search for “hydra pen” returns two papers, one on cnidarian neuropeptides and one on collagen in a sea pen, and none on the device. MAUDE has no report naming a Hydra Pen, and the two Dr. Pen reports in MAUDE name A-series and A6S pens.

Reddit has a little. One thread in r/40PlusSkinCare has the URL slug “dr_pen_hydra_pen”, which shows buyers already treating the two names as one brand:

Dr. Pen Hydra Pen
byu/Cool_Tax8498 in40PlusSkinCare

Another, in r/DIYaesthetics, has the slug “first_time_diy_microneedling_with_hydra_pen_h5”, a first home session with the newer H5:

FIRST TIME DIY MICRONEEDLING WITH hydra pen H5
byu/Adorable-Channel-190 inDIYaesthetics

We could not read either thread’s text, and no title or snippet was available for them, so nothing here should be read as what their posters reported.

Service, warranty and privacy

This review uses drpenofficial.com for service and privacy, because it sells the H3 and publishes full terms. Its warranty page offers “a standard 1-Year Warranty from the original date of delivery, plus an Additional 1-Year Extended Warranty available through product registration”, for the original buyer only, and only from “our official store or an authorized seller”. The exclusions include “Device failure due to water, serums, or liquid submersion”. On a pen built to run serum through its tip, that exclusion matters.

Its refund policy has three parts: a 30-day return for items “completely UNOPENED, UNUSED”, a “90-Day Money-Back Guarantee” if you see no visible improvement after at least six weeks of use, minus the value of used cartridges and serums, and a free replacement for a defect within a year. No restocking fee is mentioned. drpenofficial.store, the cheaper H2 and H3 seller, offers 30 days, will not refund shipping, excludes sale items (both pens were on sale), and publishes no warranty term that we found. drpenusa.net advertises a “6-Month Warranty”. The complaint record of all three stores is unverified.

drpenofficial.com’s privacy policy (last updated June 15, 2026) is the current Shopify template. It lists contact, payment, account, device and usage data, and says personal information is used “to show you online advertisements for products or services on the Services or other websites”. It does not name the operator; the about page does. No privacy incident involving any of these stores turned up.

Cartridges and running cost

Using this site’s standard schedule (one full-face session every 4 weeks, one new cartridge each time, 13 cartridges a year) and drpenofficial.com prices checked October 6, 2026:

• H3/H5 12-pin cartridges: $49.90 per pack of 10, so $4.99 each
• Cartridges for a year: 13 × $4.99 = $64.87
• First year: $149.90 (pen) + $64.87 = $214.77

At drpenofficial.store, the H3 or H2 is $139 and H2 or H3 12-pin cartridges are $75 for 20 ($3.75 each), so the first year is $139.00 + 13 × $3.75 = $139.00 + $48.75 = $187.75. The H2 adds a cost the arithmetic hides: since depth lives in the cartridge, two depths means two packs.

Serum is the running cost that other pens do not have. If every session used a full 3 ml fill, a year would take 13 × 3 ml = 39 ml, more than one 30 ml bottle of the $29.95 Peachaboo hyaluronic acid Dr. Pen US sells. That is an assumption, not a measured figure: no seller says how much a face session uses.

How it scored

• Safety (2): Health Canada’s 2021 advisory covers “all models” of Dr. Pen pens and caps this one at 3, and it loses a further point because its core feature feeds non-sterile cosmetic products into skin during needling, the timing the granuloma case reports describe, while one seller tells buyers to alcohol-soak a sealed sterile cartridge first.
• Build (5): Sellers state motor speed, depth limits and needle gauge, but publish no depth-accuracy data, no backflow test and no failure-mode record, and give conflicting needle specs (30-gauge on the H2, “0.18mm titanium” for the H3 at one store), so the category gets the neutral score.
• Performance (6): Six speeds up to 18,000 RPM, adjustable serum flow, cordless use and public instructions, held back by a 0–1.0 mm range (the H2 has fixed-depth cartridges only, which would score lower).
• Value (7): $149.90 for the pen plus 13 × $4.99 = $64.87 a year in cartridges makes $214.77 for the first year, with two usable 12-pin cartridges in the box; the serum the pen depends on is extra.
• Service (5): A one-year warranty extendable to two by registration, a 90-day results guarantee and 30-day unopened returns, offset by an exclusion for serum damage on a serum pen and no complaint record we could check.
• Privacy (5): A standard Shopify template that uses data for advertising, with the operator named only on the about page and no incident found, so it gets the neutral score.
• Evidence (2): No 510(k), no published study of any Hydra Pen, a seller calling its devices “FDA-approved”, another advertising “FDA-Cleared Technology”, and the same store describing the H2 as both depth-adjustable and dial-less and the H3 as both “Mesotherapy” and “not mesotherapy”.

Alternatives

• Dr. Pen M8: the same maker’s standard pen, $199 at Dr. Pen US with a 0–2.5 mm dial and no reservoir, so serum goes on the skin rather than through the cartridge. Also uncleared and named in the Health Canada advisory.
• Derminator 2: a home pen listed at “$ 149” with cartridges at “$ 2.85”, which its maker says uses a Hall sensor to check needle depth. It has no FDA clearance either.
• SkinPen Precision: an FDA-cleared prescription pen used in clinics, for people who want needling with a cleared device and a trained operator rather than a home serum pen.

FAQ

Is the Hydra Pen made by Dr. Pen? Yes. Guangzhou Ekai, the Dr. Pen manufacturer, lists Hydra Pen among its product categories, and Dr. Pen US now sells the H6 as the “Dr. Pen H6” after what it calls a “brand refresh”.

Is the Hydra Pen FDA approved? No. No Hydra Pen model has FDA clearance or approval, despite one seller calling its devices “FDA-approved”. The only cleared Dr. Pen device is the A20 (K230420), a prescription pen.

How deep does the Hydra Pen H3 go? To 1.0 mm. The H3 has a dial from 0 to 1.0 mm. The H2 has no dial and uses fixed 0.25, 0.5 or 1.0 mm cartridges.

What can I put in a Hydra Pen cartridge? Sellers say serums, hyaluronic acid and “skin boosters”, and one says to use “a product intended for topical cosmetic use and patch test first”. None recommends a sterile product, and published granuloma cases involve serums applied during needling. Our aftercare guide covers the evidence.

What is the difference between the Hydra Pen H3, H5 and H6? The H3 runs 0–1.0 mm with six speeds. The H5’s listing URL at drpenofficial.com calls it a 2-in-1 serum infusion and EMS microcurrent device, at $199 to $239. The H6 adds red and blue LED light, “Adjustable needle depth from 0 to 2.0 mm” and a chip in the cartridge to control flow, at $349 from Dr. Pen US. None of the three has FDA clearance.

Sources

• Guangzhou Ekai Electronic Technology, Dr.pen H6 Multifunction Beauty Pen (checked 2026-10-06): https://gzekai.com/microneedling-pen/h6/
• Guangzhou Ekai Electronic Technology, brand page and product list (checked 2026-10-06): https://gzekai.com/brand/
• Guangzhou Ekai Electronic Technology, Alibaba company profile (checked 2026-10-06): http://www.drpenoriginal.com/
• AIHBA member profile, Guangzhou Ekai Electronic Technology (checked 2026-10-06): https://aihba.com/member/guangzhou-ekai-electronic-technology-co-ltd/
• Hydrapen.com, anti-counterfeit verification page (checked 2026-10-06): https://hydrapen.com/
• Dr. Pen US, Dr. Pen H6 Advanced Serum Infusion Microneedling Pen (checked 2026-10-06): https://us.drpen.co/products/hydra-pen-h6-advanced-serum-infusion-microneedling-pen-with-light-therapy
• Dr. Pen US, H3 collection (checked 2026-10-06): https://us.drpen.co/collections/h3
• Dr. Pen US, H5 collection (checked 2026-10-06): https://us.drpen.co/collections/h5
• Dr. Pen US, Medisco Skinbooster Hyaluronic Acid (checked 2026-10-06): https://us.drpen.co/products/medisco-skinbooster-hyaluronic-acid
• drpenofficial.com, Dr. Pen HydraPen H3 Wireless Serum-Infusion Skincare Microneedling Pen (checked 2026-10-06): https://drpenofficial.com/products/dr-pen-hydrapen-h3-wireless-serum-infusion-skincare-microneedling-pen
• drpenofficial.com, HydraPen H3/H5 12-pin Replacement Cartridges (checked 2026-10-06): https://drpenofficial.com/products/dr-pen-hydrapen-h3-h5-12-pin-replacement-cartridges-10-pack
• drpenofficial.com, Dr. Pen H5 Microneedling Pen (checked 2026-10-06): https://drpenofficial.com/products/dr-pen-hydra-pen-h5-microneedling-pen-2-in-1-serum-infusion-ems-microcurrent-device
• drpenofficial.com, About Us (checked 2026-10-06): https://drpenofficial.com/pages/about-us
• drpenofficial.com, Warranty Policy (checked 2026-10-06): https://drpenofficial.com/pages/warranty-policy
• drpenofficial.com, refund policy (checked 2026-10-06): https://drpenofficial.com/policies/refund-policy
• drpenofficial.com, privacy policy (last updated June 15, 2026, checked 2026-10-06): https://drpenofficial.com/policies/privacy-policy
• drpenofficial.store, Hydra Pen H3 Microneedling Pen (checked 2026-10-06): https://www.drpenofficial.store/products/dr-pen-hydra-pen-h3-microneedling-pen
• drpenofficial.store, Hydra Pen H2 Professional Microneedling Pen (checked 2026-10-06): https://www.drpenofficial.store/products/hydra-pen-h2-professional-microneedling-pen
• drpenofficial.store, Hydra Pen H2 Replacement Cartridges (checked 2026-10-06): https://www.drpenofficial.store/products/hydra-pen-h2-replacement-cartridges
• drpenofficial.store, Hydra Pen H3 H5 Replacement Cartridges (checked 2026-10-06): https://www.drpenofficial.store/products/hydra-pen-h3-replacement-cartridges
• drpenofficial.store, Meso Secret Skinbooster (checked 2026-10-06): https://www.drpenofficial.store/products/meso-secret-skinbooster
• drpenofficial.store, refund policy and contact information (checked 2026-10-06): https://www.drpenofficial.store/policies/refund-policy
• drpenusa.net, Dr. Pen Hydra.Pen H3 (checked 2026-10-06): https://drpenusa.net/products/dr-pen-hydra-pen-h3-wireless-electric-serum-microneedling-pen-with-free-20-replacement-cartridges
• Health Canada, “Advisory – Dr. pen microneedling devices are not authorized for sale and may pose health risks” (December 16, 2021): https://www.newswire.ca/news-releases/advisory-dr-pen-microneedling-devices-are-not-authorized-for-sale-and-may-pose-health-risks-898811970.html
• Health Canada MDALL, licence 114618 (checked 2026-10-06): https://health-products.canada.ca/api/medical-devices/licence/?id=114618&lang=en&type=json
• Health Canada MDALL, device identifiers for licence 114618 (checked 2026-10-06): https://health-products.canada.ca/api/medical-devices/deviceidentifier/?licence_id=114618&lang=en&type=json
• FDA 510(k) database entry for K230420: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm?ID=K230420
• openFDA 510(k) search, device name “hydra” (searched 2026-10-06): https://api.fda.gov/device/510k.json?search=device_name:hydra&limit=20
• FDA MAUDE via openFDA, brand “hydra pen” (searched 2026-10-06, no matches): https://api.fda.gov/device/event.json?search=device.brand_name:%22hydra+pen%22
• FDA MAUDE via openFDA, brand “dr pen” (searched 2026-10-06): https://api.fda.gov/device/event.json?search=device.brand_name:%22dr+pen%22&limit=100
• PubMed search, “hydra pen” (searched 2026-10-06): https://pubmed.ncbi.nlm.nih.gov/?term=%22hydra+pen%22
• PMID 24258303: Facial allergic granulomatous reaction and systemic hypersensitivity associated with microneedle therapy for skin rejuvenation. JAMA Dermatol, 2014.
• PMID 39584690: Granulomatous Reactions From Microneedling: A Systematic Review of the Literature. Dermatol Surg, 2025.