Home ❯ Side Effects ❯ MyDerm (Lidocaine Hydrochloride): Uses, Side Effects & Interactions

MyDerm (Lidocaine Hydrochloride): Uses, Side Effects & Interactions

1. Introduction And Mechanism Of Action Of MyDerm

MyDerm is a highly concentrated topical anesthetic formulated with lidocaine hydrochloride to induce temporary dermal desensitization prior to superficial medical procedures or injections. The most notable side effect is localized skin blanching accompanied by a brief stinging sensation directly at the application site. This medication provides a profound sensory blockade, ensuring significant patient comfort during minor dermatological trauma without requiring systemic sedation.

The pharmacological mechanism relies entirely on the targeted disruption of nerve impulse conduction. Lidocaine belongs to the amide class of local anesthetics. Once applied to the skin, the lipophilic properties of the chemical vehicle allow the active molecule to penetrate the stratum corneum and diffuse rapidly toward the peripheral sensory nerve endings located in the dermis.

Upon reaching the nerve cell membrane, lidocaine binds firmly and competitively to voltage gated sodium channels. This precise binding physically blocks the influx of sodium ions into the neuron, which completely halts the generation and propagation of the action potentials responsible for transmitting intense pain signals to the central nervous system. The result is a highly localized, temporary paralysis of sensory perception.

2. Warnings And Before Taking MyDerm

Patients and practitioners must critically evaluate the total surface area targeted for desensitization before utilizing this potent numbing cream. The formulation must absolutely never be applied over massive areas of the body, such as an entire back or full leg, simultaneously. Applying the cream to vast expanses of tissue guarantees a massive influx of the active chemical into the systemic bloodstream, precipitating life threatening cardiac arrhythmias and severe neurological toxicity.

Individuals with a documented history of severe hepatic impairment must approach this topical therapy with extreme caution. Once absorbed into the systemic circulation, lidocaine relies entirely on hepatic enzymes for degradation and clearance. Patients with compromised liver function will metabolize the drug significantly slower, causing toxic concentrations to accumulate rapidly in the blood even from relatively small dermal applications.

A highly specific and dangerous clinical warning involves a rare blood disorder known as methemoglobinemia. Patients with a known genetic susceptibility to this condition or those experiencing severe respiratory distress should strictly avoid high concentration amide anesthetics. Excessive absorption can chemically alter hemoglobin molecules, severely reducing the blood’s critical ability to carry oxygen to vital organs, leading to rapid cyanosis and suffocation.

3. Indications And Dosage Guide For MyDerm

This medication is explicitly indicated for the temporary, localized numbing of intact skin prior to minor dermatological procedures, venipuncture, intravenous cannulation, and superficial cosmetic interventions. It serves to eliminate the acute, sharp pain associated with needle insertions and minor surgical abrasions.

Standard clinical application requires the practitioner to dispense a precise, thick layer of the cream directly onto the targeted, unbroken skin. The cream must never be aggressively rubbed into the tissue. Instead, it should sit heavily on the surface. To maximize penetration, the practitioner frequently covers the thick layer of cream with a transparent, occlusive medical dressing.

The absolute critical factor in dosing is the duration of application. The cream typically requires a minimum of thirty to sixty minutes of undisturbed contact time under the occlusive dressing to achieve profound anesthesia. Immediately prior to the medical procedure, the dressing must be removed, and all remaining residual cream must be completely wiped away from the skin surface to prevent further, dangerous absorption.

4. In-Depth Side Effects Analysis Of MyDerm

Because the application involves high concentrations of a potent neurological blocking agent, localized tissue reactions are virtually guaranteed. The severity of these side effects scales directly with the thickness of the application and the total duration the cream remains on the skin.

Common Side Effects

The most universally expected reaction is localized skin blanching, where the treated area turns stark white due to mild superficial vascular changes. Patients frequently experience a transient, mild stinging, deep burning, or intense cold sensation immediately upon application. A highly prominent, deep numbness that makes the skin feel completely wooden or absent is the intended, albeit unusual feeling, therapeutic outcome.

Serious Side Effects You Should Report

Any systemic symptoms mandate an immediate, aggressive medical response. If the patient develops a sudden, severe, pounding headache, extreme dizziness, a distinct metallic taste in the mouth, or significant ringing in the ears, they must seek emergency cardiovascular and neurological care. Furthermore, if the treated skin develops a deep blue or black discoloration, it indicates severe tissue ischemia requiring urgent dermatological intervention.

Rare Side Effects

A tiny fraction of the population may experience an acute allergic contact dermatitis, presenting as intense, spreading redness, severe itching, and vesicular blistering beyond the application zone. Extremely rare but catastrophic systemic toxicity can present as profound confusion, severe muscular tremors, and ultimately, grand mal seizures if a massive quantity of the drug enters the bloodstream rapidly.

Side Effects That Usually Do Not Require Medical Attention

A brief period of mild, localized erythema, where the skin turns slightly red after the numbing effect wears off, is a benign physiological reaction to the removal of the occlusive dressing and the return of normal blood flow. Mild, temporary flaking of the superficial epidermis a few days after application can occasionally occur due to the chemical vehicle.

Side Effect Category Specific Symptoms
Localized Sensory Intense coldness, brief stinging, profound deep numbness
Systemic Toxicity Warning Metallic taste, severe dizziness, auditory ringing, tremors
Dermatological Allergy Severe blistering, spreading redness, intense pruritus
Expected Visual Changes Temporary stark white blanching, mild post procedural redness

5. Overdose Symptoms Of MyDerm And What To Do

A topical overdose is a highly dangerous medical emergency that typically occurs when the cream is continuously applied to massively large areas, applied to actively bleeding skin, or left under airtight wraps for many hours. Symptoms of a massive toxicity involve severe central nervous system depression characterized by extreme confusion, slurred speech, violent seizures, and ultimately fatal cardiac arrest.

If systemic toxicity is suspected, the practitioner or patient must immediately use a wet towel to vigorously wipe away all remaining cream from the skin to halt any further chemical absorption. Emergency medical services must be dispatched immediately. Hospital treatment focuses entirely on advanced life support, utilizing intravenous lipid emulsion therapy to bind the excess drug in the blood, maintaining a clear airway, and aggressively managing any seizure activity.

6. Missed Dose And What To Avoid With MyDerm

Because this medication is utilized entirely as a single pre procedural application, the concept of a missed dose does not apply. If the cream is wiped off prematurely, the patient simply will not achieve the desired level of anesthesia and will feel the pain of the subsequent medical procedure.

Patients must strictly avoid applying any external heat sources, such as heating pads, hot water bottles, or intense hair dryers, directly to the treated area. Heat heavily dilates the superficial blood vessels and drastically accelerates the systemic absorption of the toxic anesthetic compounds. Furthermore, patients must completely avoid applying this high concentration cream to deep puncture wounds, severe thermal burns, or mucous membranes.

7. Drug And Alcohol Interactions With MyDerm

The most severe pharmacological interaction involves patients actively taking class I antiarrhythmic medications for serious cardiac conditions. Drugs like tocainide or mexiletine share profound structural similarities with lidocaine. Combining oral antiarrhythmics with this topical anesthetic dramatically lowers the threshold for systemic neurological toxicity and triggers fatal, compounding cardiac arrhythmias.

If a patient is currently managing a severe sunburn with another topical anesthetic formulation like benzocaine, they must absolutely not use this cream concurrently. Stacking multiple local anesthetics saturates the enzymatic pathways and virtually guarantees a highly dangerous toxic overdose.

Alcohol consumption significantly endangers the patient during the use of this product. Alcohol is a potent systemic vasodilator that actively accelerates the absorption of the cream into the bloodstream. Furthermore, severe alcohol intoxication can deeply mask the early, critical warning signs of systemic lidocaine toxicity, such as confusion or auditory ringing, leading to delayed emergency treatment.

8. Precautions, Safety And Duration Of Action For MyDerm

The onset of profound dermal anesthesia is relatively slow, requiring significant contact time, but it yields a deep sensory blockade. The profound numbing effects generally persist for approximately one to two hours following the physical removal of the cream, depending heavily on the density of the vascular network in the treated area.

Safety mandates absolute protection of the treated area from unintentional self injury. Because the skin is completely numb, the patient cannot feel extreme heat, severe cold, or sharp mechanical trauma. Patients must be rigorously counseled not to aggressively scratch, rub, or expose the numb area to extreme temperatures until normal physiological sensation completely returns.

9. How To Stop Taking MyDerm And Storage

Treatment with this topical cream concludes the moment the cream is physically wiped away prior to the medical procedure. There are absolutely no physical withdrawal symptoms associated with abruptly stopping this localized medication. The natural sensation of the skin simply returns gradually over a period of hours as the chemical disperses from the local nerve endings.

Storage of the container is critical for chemical safety and stability. The tube must be stored at a cool, controlled room temperature, strictly away from direct sunlight, open flames, or any high heat sources. Exposing the emulsion to extreme high temperatures will permanently separate the chemical base and rapidly degrade the active anesthetic molecules, rendering the cream completely useless.

10. When To See A Doctor For MyDerm Side Effects

Immediate medical evaluation is necessary if the numbed area fails to regain normal, complete sensation after four to six hours, or if the skin develops a severe, dark blue tint. These findings suggest a severe and highly dangerous restriction of local blood flow or nerve damage requiring clinical assessment.

Emergency medical services must be contacted instantly if the patient experiences sudden chest pain, extreme difficulty breathing, or severe, rapid swelling of the face and throat after utilizing the cream. These are hallmark signs of a catastrophic anaphylactic reaction to the amide anesthetic that requires immediate life saving intervention.

Frequently Asked Questions

1. Can I use this cream to numb a large area before a massive tattoo session?

You must exercise extreme caution and always consult a medical professional. Slathering high concentration numbing cream over a massive area of your body and wrapping it in plastic for hours can easily cause a fatal overdose of the medication.

2. Why did my skin turn stark white after leaving the cream on for an hour?

The active medication causes mild changes in the superficial blood flow directly under the skin, pushing the blood slightly deeper and causing a harmless, stark white appearance that will completely fade as the numbness wears off.

3. Can I rub the cream into my skin like a normal lotion to make it work faster?

No, aggressive rubbing does not improve the anesthetic effect and actually speeds up dangerous systemic absorption. You must apply a thick, heavy layer that sits on top of the skin and cover it with a medical dressing as directed.

4. What should I do if I accidentally get this cream in my eye?

You must immediately flush the eye with a massive amount of lukewarm water for at least fifteen to twenty minutes. The chemicals will severely numb the eye and can cause extreme corneal damage, so you must seek emergency ophthalmological care instantly.

5. Is it safe to use a heating pad on the area to help the cream absorb deeper?

Absolutely not. Applying external heat dramatically opens your blood vessels and accelerates the absorption of the toxic chemicals into your heart and brain. Furthermore, because your skin is numb, you will easily suffer a severe third degree burn without feeling it.

6. Why does my mouth suddenly taste like metal after applying the cream to my arm?

A distinct metallic taste in the mouth is a critical early warning sign that a toxic amount of the anesthetic has entered your systemic bloodstream. You must immediately wash all the cream off your skin and monitor yourself closely for severe dizziness or confusion.

7. Can I apply this cream to an open, bleeding wound to stop the pain?

You must never use this highly concentrated cream on deep puncture wounds, severe burns, or actively bleeding skin. The open blood vessels will rapidly pull the dangerous chemicals directly into your bloodstream, which can cause fatal heart arrhythmias.

Bibliography

Disclaimer: The content is for informational purposes only and does not replace medical advice. Always consult your doctor or pharmacist for personalized treatment.

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Medical Emergency: If you are experiencing a medical emergency, please call 911 or contact your local emergency services immediately.

The information provided on MySymptom is for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.

Written & Medically Reviewed By

George Gkikas

George Gkikas, PDHom(UK) AFHom

  • Specialist Homeopath
  • Specializing in Chronic & Autoimmune Diseases, and Adverse Drug Reactions
  • Certified Member of the Society of Homeopaths (UK)
  • Faculty of Homeopathy (Under the Patronage of HM King Charles III)