Key Takeaways: How Proctosedyl Works

Dual action: combines a steroid (hydrocortisone) and a local anaesthetic (cinchocaine).
Hydrocortisone: reduces inflammation, swelling and itching by suppressing immune mediators.
Cinchocaine: numbs nerve endings, providing rapid pain relief.
Onset: anaesthetic effect within minutes; anti‑inflammatory effect peaks over a few hours.
Duration: effects last several hours; minimal systemic absorption with correct use.
Not a cure: manages symptoms while underlying causes (straining, diet) need attention.

Proctosedyl combines two active ingredients that work together to relieve the discomfort of haemorrhoids: hydrocortisone (a topical corticosteroid) reduces swelling and inflammation, while cinchocaine hydrochloride (a local anaesthetic) numbs the area to stop pain and itching. This page explains the science behind how each component works in your body.

Important Medical Advice

Do not use Proctosedyl if you have an infection (bacterial, fungal, viral) in the anal area, as steroids can mask or worsen infections. If you experience rectal bleeding, severe pain, or symptoms lasting more than 7 days, consult your doctor. Seek immediate help if you have an allergic reaction (swelling of face, difficulty breathing).

Chemical Composition & Molecular Structure of Proctosedyl

Proctosedyl contains two active pharmaceutical ingredients with distinct chemical structures that determine how they work.

Active Ingredients

Hydrocortisone

C₂₁H₃₀O₅

A corticosteroid hormone produced by the adrenal cortex. Its structure allows it to pass through cell membranes and bind to glucocorticoid receptors.

Cinchocaine HCl

C₂₀H₂₉N₃O₂ · HCl

An amide-type local anaesthetic. The lipophilic aromatic ring and basic amine enable it to penetrate nerve membranes and block sodium channels.

Formulation Details

Form	Active per dose	Inactive ingredients
Ointment	Hydrocortisone 5mg/g, Cinchocaine 5mg/g	Liquid paraffin, white soft paraffin, wool fat
Suppository	Hydrocortisone 5mg, Cinchocaine 5mg	Hard fat (Witepsol)

🗒️ Formulation insight: The ointment base (paraffin and wool fat) creates a protective barrier while delivering drugs. Suppositories use a hard fat that melts at body temperature (37°C) to release medication in the anal canal.

Dual Mechanism of Action: How Proctosedyl Targets Haemorrhoids

Proctosedyl treats the two main symptoms of haemorrhoids – pain and inflammation – through complementary pharmacological actions.

Cinchocaine rapidly blocks pain signals from nerve endings.
Hydrocortisone suppresses the inflammatory cascade that causes swelling, redness and itching.

Together they provide fast symptomatic relief while the body works to heal the underlying tissue.

Cinchocaine: Local Anaesthetic Action in Proctosedyl

Cinchocaine is a potent, long-acting amide local anaesthetic. When applied to the anal mucosa, it works by:

Sodium channel blockade: Cinchocaine diffuses through the nerve cell membrane in its uncharged form, then becomes ionised inside the cell and binds to voltage-gated sodium channels.
Prevention of depolarisation: By blocking sodium influx, it stops the nerve from generating an action potential, effectively halting pain signal transmission.
Selective sensory block: It affects small-diameter pain fibres (Aδ and C) before larger touch fibres, so numbness is felt without complete loss of sensation.

Onset of anaesthesia occurs within 5–15 minutes and lasts 2–4 hours, providing significant relief from the sharp pain and itch of haemorrhoids.

Hydrocortisone: Anti‑inflammatory Effects in Proctosedyl

Hydrocortisone is a glucocorticoid that mimics the body's natural stress hormone cortisol. Its anti‑inflammatory action involves several steps:

Intracellular receptor binding: Hydrocortisone diffuses into cells and binds to glucocorticoid receptors in the cytoplasm.
Gene transcription modulation: The receptor‑drug complex moves to the nucleus and influences DNA transcription, increasing production of anti‑inflammatory proteins (like lipocortin) and decreasing pro‑inflammatory cytokines (IL‑1, TNF‑α, etc.).
Reduced vasodilation and permeability: It stabilises mast cells and reduces release of histamine and prostaglandins, leading to less swelling, redness and itching.

This effect peaks after a few hours and can last up to 24 hours, helping to shrink swollen haemorrhoidal tissue.

🗒️ Clinical note: Long‑term or excessive use of topical steroids can cause skin thinning (atrophy). That’s why Proctosedyl is intended for short‑term use (usually 7 days).

Metabolic Effects & Elimination of Proctosedyl Components

Although applied topically, small amounts of both drugs can be absorbed, especially if the skin is broken. They are then processed by the body.

Hydrocortisone metabolism

Liver metabolism: Mostly reduced to tetrahydrocortisone and conjugated with glucuronic acid or sulphate.
Half‑life: Approximately 1–2 hours for the topical dose (systemic).
Excretion: Metabolites are eliminated via urine (mainly) and bile.

Cinchocaine metabolism

Liver metabolism: Primarily by CYP3A4 to several metabolites (dealkylation and hydroxylation).
Half‑life: About 1.5–2 hours.
Excretion: Metabolites excreted in urine (less than 5% unchanged).

Because systemic absorption is minimal with correct use, the risk of significant metabolic effects is very low. However, prolonged application on broken skin or overdose could lead to systemic side effects.

Absorption & Distribution of Proctosedyl

Local absorption

Both ointment and suppository deliver drugs directly to the affected area. Absorption through intact skin is low (1‑2% for hydrocortisone), but inflamed or broken anal tissue can allow higher uptake. The ointment base forms a film that prolongs contact time.

Distribution

If absorbed, hydrocortisone binds extensively to plasma proteins (90‑95%), while cinchocaine is about 70% protein‑bound. Both are widely distributed due to their lipophilic nature, but with topical use, systemic levels remain negligible.

Parameter	Hydrocortisone	Cinchocaine
Bioavailability (topical)	1–7% (inflamed skin up to 30%)	Low, but enhanced on mucosa
Peak local concentration	1–2 hours	15–30 minutes
Protein binding	90%	70%

Clinical Efficacy of Proctosedyl for Haemorrhoids

Clinical studies and extensive use confirm that the combination of a corticosteroid and local anaesthetic is more effective than either alone for acute haemorrhoid symptoms.

Pain relief: Cinchocaine provides rapid (within minutes) reduction in pain and itch in over 80% of patients.
Swelling reduction: Hydrocortisone significantly decreases oedema and inflammation after 2–3 days.
Overall symptom control: In a randomised trial, 85% of patients using a similar combination reported good or excellent relief after one week.

When to use

Proctosedyl is suitable for internal and external haemorrhoids, anal fissures and proctitis. It is not a cure for haemorrhoids – lifestyle measures (high‑fibre diet, avoiding straining) are essential to prevent recurrence.

Proctosedyl Mechanism FAQs

How quickly does Proctosedyl start working?

The local anaesthetic (cinchocaine) begins numbing the area within 5–15 minutes. The anti‑inflammatory effect of hydrocortisone takes a few hours to become noticeable.

Does Proctosedyl get into my bloodstream?

Only tiny amounts are absorbed through intact skin – not enough to cause whole‑body effects. If the skin is broken or you use it for a long time, absorption increases slightly.

Can Proctosedyl make haemorrhoids disappear?

No, it relieves symptoms but doesn't cure haemorrhoids. To shrink or prevent them, you need to address the root cause – usually straining and low‑fibre diet.

Why does Proctosedyl contain both a steroid and anaesthetic?

Because haemorrhoids cause both pain (anaesthetic needed) and inflammation (steroid needed). The combination gives fast, comprehensive relief.

How long can I safely use Proctosedyl?

It is meant for short‑term use – usually up to 7 days. Prolonged use can cause skin thinning or mask more serious conditions.

Need Treatment for Haemorrhoids?

If you're struggling with painful or itchy piles, a UK‑registered doctor can assess your symptoms and prescribe Proctosedyl if appropriate – all through a quick online consultation.