Kybella
Kybella goes under the chin as a grid of small injections, not one large one. Swelling in the days afterwards is expected — it is part of how it works.
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Kybella vs Morpheus8
Kybella dissolves fat under the chin. It is an injection that breaks open fat cells, and your body clears the debris away. Morpheus8 does not remove a fat pad. It uses tiny needles and heat to tighten skin and build collagen, so the two treatments fix different problems.
At a glance
| The difference | Kybella | Morpheus8 |
|---|---|---|
| What it is | A drug that breaks open fat cells | A device that heats skin with needles |
| What it is best at | The fat pad under the chin | Skin — texture, acne scars, mild laxity |
| Downtime | One to two weeks of visible swelling | Three to four days of redness |
Morpheus8
The Morpheus8 tip up close. The gold pins are what carry the radiofrequency energy below the surface — the needles are the delivery route, not the treatment itself.
Side by side
The differences that matter
What it is
Kybella
A drug that breaks open fat cells
Deoxycholic acid, injected into the fat under the chin. It is a drug, not a device.
Morpheus8
A device that heats skin with needles
Coated microneedles carry radiofrequency heat inside the skin.
How it works
Kybella
Chemistry
Deoxycholic acid is a bile acid. Your body already uses it to break up the fat in your food. Injected into the fat pad, it splits fat cells open, and your immune system clears them. It is not choosy about which cells it hits, so placement matters.
Morpheus8
Heat
The needles place small columns of heat injury in the skin. The skin then contracts and rebuilds collagen over months.
What it is best at
Kybella
The fat pad under the chin
And nowhere else. The label says use anywhere other than under the chin has not been shown to be safe or to work.
Morpheus8
Skin — texture, acne scars, mild laxity
This class of device has its best evidence for dented acne scars. No trial has tested it on fat under the chin.
Downtime
Kybella
One to two weeks of visible swelling
Swelling, bruising, pain, numbness and firmness follow each session. The one to two weeks is what clinics see, not a figure from the label.
Morpheus8
Three to four days of redness
Almost everyone gets redness. About a third get swelling. The skin barrier dips for the first few days and is back to normal by day seven.
Comfort
Kybella
A grid of injections, every session
The risks on the label that matter most are nerve injury, which causes an uneven smile, and trouble swallowing.
Morpheus8
Needling plus heat, with numbing cream
No study has compared pain between the two, so no comparison is offered here.
Sessions
Kybella
Up to 6 sessions, a month apart
The label expects a course, not a single fix.
Morpheus8
1 to 6 sessions, 3 to 6 weeks apart
The maker says 1 to 6 treatments, and usually 3 to 5 at mild-to-moderate settings.
How long it lasts
Kybella
No published figure
Kybella destroys fat cells outright. But no study has measured how long the result holds, so no figure is quoted.
Morpheus8
Measured out to six months
Six months is the longest follow-up in the research. The clinic claim of one to three years has no published source. Results are usually not clear at one month, are clear at three, and hold at six.
The at-home or drugstore version
Kybella
There is no home version
Fat-dissolving drops and chin creams are sold online. Deoxycholic acid only works inside the fat pad, several millimetres down. A cream sits on the surface and cannot get there.
Morpheus8
Home devices are not the same treatment
Home radiofrequency wands put a fraction of the power into the surface. They have no needles, so nothing carries the energy down to the depth the clinic device reaches.
Who tends to be happy with it
Kybella
- Best for — Someone with a clear pad of fat under the chin who wants it gone and can live with visible swelling.
- The mindset — Fat is the problem. Trade downtime for it.
Morpheus8
- Best for — Someone whose complaint is the skin: texture, acne scarring, crepiness, mild slackness.
- The mindset — Skin quality, built slowly over months.
The fine print
Kybella
Kybella is a drug, and the FDA approved it. It is deoxycholic acid, approved under NDA 206333 on 29 April 2015 for "improvement in the appearance of moderate to severe convexity or fullness associated with submental fat in adults." It was developed as ATX-101 by Kythera, acquired by Allergan, and is now distributed by AbbVie. A drug approval requires well-controlled trials showing the product works for that specific use.
Morpheus8
Morpheus8 is an InMode device, and the FDA cleared it rather than approved it. It went through 510(k), a route that mainly requires showing a device is much like one already on sale. Its clearances name electrocoagulation and hemostasis — surgical wording for sealing tissue and stopping bleeding (K192695, 2019) — then coagulation or contraction of soft tissue (K231790, 2023). No clearance names wrinkles, laxity, acne scars or a double chin. It sits under product code GEI, the FDA's category for electrosurgical cutting and coagulation devices.
Compare the total cost
Kybella
Ask how many Kybella treatment visits and vials the proposed under-chin plan is expected to require. Get the estimated course total.
Morpheus8
Ask which area and goal the Morpheus8 plan addresses and how many sessions it includes. A tightening session is not automatically a substitute for the quoted fat-reduction plan.
Common questions
Questions Patients Ask
Which one gets rid of a double chin?
Kybella, if the double chin is mostly fat. That is its approved indication and the only place it is meant to be used. Morpheus8 has no evidence for reducing submental fat, and the one study that measured the fat layer found it unchanged.
Then what is Morpheus8 doing under the chin?
Working on the skin. There is evidence in this device class for tightening submental skin, not for removing the fat beneath it. Some people's "double chin" is largely loose skin, and those are the people this suits.
Why does it matter that Kybella is a drug and Morpheus8 is a device?
Because the standards differ. A drug approval requires trials showing the product works for the stated use. A 510(k) device clearance mainly requires showing the device is much like one already sold. Same agency, very different bar - and it is worth knowing which one is behind a claim.
How bad is the swelling after Kybella?
Real, and visible. Marked swelling, bruising, pain, numbness and firmness under the chin follow each session. The conventional description is roughly one to two weeks, though that duration is not a figure quoted from the label. Most people plan their diary around it.
How many Kybella sessions will I need?
Typically up to six, at least a month apart, depending on how much fat is there.
Can Kybella be used on jowls, bra fat or inner thighs?
Not on-label. The label's Limitations of Use say the safe and effective use of Kybella outside the submental region "has not been established and is not recommended."
Can I have both?
They do different jobs, and it is common enough to have both fat and loose skin. No published study has tested the two together, so sequencing is a clinical judgement - and it is worth remembering that removing fat can make loose skin more obvious.
Safety to keep in mind
RF microneedling can cause serious injury. The FDA has received reports of burns, scarring, loss of fat, nerve damage and disfigurement. Some injuries have needed surgery or other medical treatment. A few days of expected redness is not the full risk picture.
Choose a licensed medical professional trained on the device. Discuss the risks and other treatment options before deciding. RF microneedling should not be done at home.