Powder Procaine

Description

Procaine is a local anesthetic drug of the amino ester group. It is used primarily to reduce the pain of intramuscular injection of penicillin, and it is also used in dentistry. Owing to the ubiquity of the trade name Novocain, in some regions procaine is referred to generically as novocaine. It acts mainly as a sodium channel blocker. Today it is used therapeutically in some countries due to its sympatholytic, anti-inflammatory, perfusion enhancing, and mood enhancing effects.

Procaine was first synthesized in 1905, shortly after amylocaine. It was created by the German chemist Alfred Einhorn who gave the chemical the trade name Novocaine, from the Latin nov- (meaning new) and -caine, a common ending for alkaloids used as anesthetics. It was introduced into medical use by surgeon Heinrich Braun. Prior to the discovery of amylocaine and procaine, cocaine was the most commonly used local anesthetic. Einhorn wished his new discovery to be used for amputations, but surgeons preferred general anesthetic. Dentists, however, found it very useful.

Procaine Pharmacology

Procaine hydrochloride acts on peripheral nerves to produce conduction blocking effects. It relies on concentration gradients to penetrate the nerve cell membrane in a diffuse manner, blocking sodium ion channels on the inside, raising the excitation threshold of nerve cells and losing excitability and conductivity. Information Delivery blocked. Procaine hydrochloride has a stronger effect on sensory nerves than motor nerves, and on small fibers than large fibers. Procaine hydrochloride also has antiarrhythmic, anticonvulsant, anti-inflammatory and coronary artery dilation effects.

It is less toxic and is one of the commonly used local anesthetics. This drug is a short-acting ester local anesthetic with low lipophilicity and weak penetration into mucous membranes. Generally not used for topical anesthesia, local injection is often used for infiltration anesthesia, conduction anesthesia, subarachnoid anesthesia and epidural anesthesia. It takes effect 1-3 minutes after injection and can last for 30-45 minutes.

The maintenance time can be extended by 20% after adding epinephrine. Procaine can be hydrolyzed by esterase in plasma and converted into para-aminobenzoic acid (PABA) and diethylaminoethanol. The former can resist the antibacterial effect of sulfa drugs, so it should be avoided to be used together with sulfa drugs. Procaine can also be used for local sealing of injured areas. Overdose may cause central nervous system and cardiovascular reactions. Sometimes it can cause allergic reactions, so a skin allergy test should be done before taking the medicine, but those with negative skin tests can still have allergic reactions. Those who are allergic to this drug can use chloroprocaine and lidocaine instead.

Procaine Pharmacokinetic

Procaine hydrochloride is mainly hydrolyzed by the liver into p-aminobenzoic acid and diethylamine in the body. The former is combined with glycine and excreted in the urine, and the latter is acetylated or methylated and excreted in the urine. The elimination half-life of procaine hydrochloride is 1.5 to 2 hours, which is affected by hepatic blood flow, liver function and plasma cholinesterase activity.

What is Procaine?

Procaine is a local anesthetic commonly used to numb tissues during medical procedures like dental work, minor surgeries, or injections. It works by blocking nerve signals in the area where it's applied, temporarily preventing the sensation of pain. Procaine is also known by the brand name Novocain.

It belongs to a class of drugs called ester-type anesthetics and is used primarily for local anesthesia to make the patient more comfortable during short medical procedures. Procaine has largely been replaced by newer anesthetics, but it's still used in some settings.

In addition to its anesthetic properties, procaine has also been explored for other uses, such as improving blood circulation or treating conditions like arthritis in some alternative medicine practices, though these uses are less common and not widely accepted in conventional medicine.

How Procaine works?

Procaine works by blocking the conduction of nerve impulses, particularly pain signals, in the area where it is administered. It achieves this by:

Inhibiting sodium channels: Procaine binds to and blocks voltage-gated sodium channels in nerve cells, which are responsible for generating and transmitting electrical signals (action potentials). By blocking these channels, procaine prevents the nerve from depolarizing, which is necessary for sending signals, including pain signals, to the brain.

Numbing the area: As the nerve impulses are blocked, the sensation of pain and other feelings like touch and temperature are temporarily diminished or completely lost in the area where procaine is applied.

Procaine is usually used for local anesthesia, meaning it only affects a specific area of the body without causing a loss of consciousness. Its effect is temporary, typically lasting between 30 minutes to 1 hour depending on the dosage and the specific procedure.

Dosage and usage

Local injection: The concentration of the injection is mostly 0.25%-0.5%, and the dosage depends on the needs of the condition, but it should not exceed 1.5g per hour. If the anesthesia time is short, a small amount of epinephrine (1; 1) can be added to prolong the effect. Dental anesthesia sometimes uses a solution concentration of 2% to 4%.
Precautions
1. When high concentrations are accidentally injected into blood vessels, it can cause restlessness, floating sensation, dizziness, confusion, perioral sensory abnormalities, tinnitus, and tremors of the face and distal limbs; subsequently, tonic-clonic convulsions may occur. When the plasma concentration is very high, it can inhibit breathing and cause respiratory arrest and
coma.

2. Excessive dosage may cause nausea, sweating, pulse rate, difficulty breathing, facial flushing, delirium, excitement, and convulsions. Convulsions can be rescued by intravenous injection of amobarbital.
3. During spinal anesthesia, blood pressure often drops, which can be prevented by intramuscular injection of 15 to 20 mg of ephedrine before anesthesia.
4. Anaphylactic shock sometimes occurs, so the patient's allergy history should be asked before medication, and an intradermal test (intradermal injection of 0.1ml of 0.25% solution) should be performed on patients with allergic constitution.
5. It is not suitable to be compatible with glucose solution as it may reduce its local anesthetic effect.

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