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J-Cain yellow jar (Korea 🇰🇷)
FromTHB 1,100
Anesthetic2 items
Anesthetic
An anesthetic numbs part of the body while the patient stays awake. This category covers local anesthetics doctors use in clinic procedures: lidocaine injection 2% (Dronil-A) and a lidocaine cream (J-Cain 10.56%). It is for readers who want to understand the ingredient, strength and form before speaking with a doctor.
Start with how a local anesthetic differs from general anesthesia, then see how the injection and the topical differ, read the strength and ingredients on the label, and note how a topical can be absorbed through the skin.
Brands in Anesthetic
All 2 items
Dronil-A 2%
THB 350
What is the anesthetic in this category, and what should you check before choosing?
The anesthetics here are local anesthetics containing lidocaine in two forms, an injection and a topical cream, used by doctors in clinic procedures. Lidocaine is an amide local anesthetic that blocks the nerve signals that carry pain. Before choosing, read the form, the strength, any added ingredient such as epinephrine and the conditions of use on the label, since an injection and a topical carry different cautions.
References
- Lidocaine hydrochloride injection - prescribing information(opens in a new tab) NLM DailyMed
- Anesthesia(opens in a new tab) NLM MedlinePlus
- Lidocaine Transdermal Patch: MedlinePlus Drug Information(opens in a new tab) NLM MedlinePlus
- Warning letter to SeeNext Venture Ltd (topical lidocaine products for cosmetic procedures)(opens in a new tab) U.S. FDA
- Lidocaine(opens in a new tab) Wikipedia
What is an anesthetic, and how does it differ from general anesthesia?
Per MedlinePlus, local anesthesia numbs a small area and you stay awake. Regional anesthesia numbs a larger area such as an arm or a leg, while general anesthesia affects the whole body and produces a state like deep sleep with no sensation.
This category is local anesthesia, not general anesthesia. A dentist, nurse or doctor may give some anesthetics, while others need an anesthesiologist. Who gives the medicine and how it is prepared are matters for the clinic, not something a category name can tell you.
What is lidocaine, the ingredient in this category?
Lidocaine (also lignocaine, brand name Xylocaine) is an amino amide local anesthetic, synthesised in 1943, marketed in 1948 and listed on the WHO Essential Medicines List, according to Wikipedia. MedlinePlus describes it as a medicine that blocks the nerve signals that carry pain.
It is usually the hydrochloride salt, supplied as injectable solutions, topical preparations and patches. Some preparations add epinephrine to prolong the effect and reduce bleeding, so check which preparation the label describes.
How do an anesthetic injection and a topical anesthetic differ?
Per the lidocaine hydrochloride injection label, the injection is used for local or regional anesthesia by infiltration, for peripheral nerve blocks and, in some cases, central neural blocks. The label says it must be used by clinicians trained in managing toxicity and emergencies, with oxygen and resuscitative equipment at hand.
A topical anesthetic acts at the skin, so absorption through the skin into the bloodstream has to be considered. Both forms in this category are doctors' medicines, and they are not interchangeable, because the site and method of use for each are set by the doctor.
What does a strength such as 2% or 10.56% on the label tell you?
The percentage is the share of lidocaine in the product. In this category the Dronil-A injection is labelled 2% and the J-Cain cream 10.56%. The example injection label opened for this page is 1%, so injection strengths differ by product, and a higher number does not mean better or interchangeable.
In a warning letter to a company, the FDA states that over-the-counter external lidocaine products fall between 0.5% and 4%, and that another brand's products for cosmetic procedures at 5% and 10.56% are above that range. That concerns the products the FDA named, so read strength together with the conditions of use on the label of the item you care about.
What cautions apply to a topical anesthetic used before a procedure?
The FDA warns that numbing products of the -caine type applied over large areas, on irritated or broken skin, for long periods or under a covering after application can increase absorption into the bloodstream, which may cause serious injury if used improperly. Covering the skin after application is something the FDA singles out.
The FDA also notes that use before a procedure may not be supervised by trained health professionals, so large amounts may be applied. That is why a higher-strength topical is something a doctor sets and supervises, rather than something a user decides from the category name.
What cautions do doctors weigh for an anesthetic injection?
The label lists hypersensitivity to amide-type local anesthetics as a contraindication and warns about methemoglobinemia and severe allergic reactions. Wikipedia says adverse effects are rare when it is given correctly, while too much systemic exposure affects the central nervous system and the cardiovascular system, which is why emergency readiness matters.
Doctors also tell plain solutions from those with epinephrine. The label says solutions with preservatives such as methylparaben are not used for epidural or spinal anesthesia, and solutions with epinephrine are not used for intravenous regional anesthesia. Read which preparation the label states.
What should you tell the doctor before an anesthetic, and how does it relate to other categories?
Wikipedia advises caution with lidocaine in liver impairment and in older people, and lists second- or third-degree heart block without a pacemaker as a contraindication. People taking class I antiarrhythmics should tell the doctor, along with any history of allergy to local anesthetics.
An anesthetic is a medicine a doctor uses to support a procedure, unlike a tissue-filling material such as Filler or a product from the Botox group, which are different types. Other supplies sit in Supplies & Equipment; read each category separately and check each item's label.
Frequently asked questions
What is an anesthetic, and what kinds are there?
MedlinePlus lists local, regional and general anesthesia and monitored sedation. This category is local anesthesia, which numbs a small area while the patient stays awake. The ingredient here is lidocaine as an injection and as a topical cream, and the doctor chooses the form according to the procedure.
How does a local anesthetic differ from general anesthesia?
A local anesthetic numbs only the treated area and the patient stays aware, while general anesthesia affects the whole body and produces a state like deep sleep, as MedlinePlus explains. This category is the first kind. Depending on the medicine, it may be given by a dentist, nurse, doctor or anesthesiologist.
Is lidocaine the same as lidocaine under another name?
Yes. Lidocaine is also called lignocaine, and its best-known brand name is Xylocaine, according to Wikipedia. It is an amino amide local anesthetic used as an injection, a topical and a patch. The names differ but the ingredient is the same; the differences lie in the form and strength of each product.
How does an injectable anesthetic differ from a topical one, and who uses them?
The injection goes into tissue or near a nerve, and its label says it must be used by trained clinicians with resuscitative equipment ready. A topical acts at the skin and brings absorption concerns. Both forms in this category are used or directed by a doctor.
Is a high-strength topical anesthetic something to be careful with?
Yes. The FDA warns that -caine products used over large areas, on broken skin, for long periods or under a covering increase absorption into the bloodstream and may cause serious injury. It also states 0.5% to 4% as the range for over-the-counter external lidocaine, so a doctor should set the use of anything stronger.
How much does an anesthetic cost, and how should you think about it?
The price depends on the form, strength and pack size of each item. An anesthetic is part of a procedure the doctor plans, so the total cost depends on that procedure as well. Ask what the quoted cost covers, such as assessment, the medicine and follow-up, so the scope is clear.
How does an anesthetic with epinephrine differ from one without?
Wikipedia says lidocaine is often mixed with epinephrine to prolong its effect and reduce bleeding. The injection label separates plain solutions from those with epinephrine and says solutions with epinephrine are not used for intravenous regional anesthesia. Read which preparation the label states and leave the choice to the doctor.
Who should tell the doctor before using an anesthetic?
People who have had an allergy to a local anesthetic, people with liver impairment, older people, people with heart block and people who take class I antiarrhythmics, as the label and Wikipedia describe. Bring your medicine list and health history to the doctor, who chooses the type and form of anesthetic.