Medicine guide

Areston instant

On the Bulgarian pack: Арестон инстант 12,5 mg филмирани таблетки

12.5 mg · film-coated tablets

  • Available without prescription
  • Muscles, joints and bones
Active substance
Diclofenac
Made by
Medochemie Ltd.

Quoted from the official source. Not yet reviewed by Mediclarum — the leaflet in your pack is authoritative.

What it is for

Medicine groupMuscles, joints and bonesM01AB05

Mediclarum has not yet read the official leaflet for this product. The exact uses and dose are in the leaflet inside the pack. Open the official leaflet

How it works

This product’s leaflet is published as a scanned document. This section quotes the US prescribing label for the same active substance (diclofenac sodium). It describes the substance, not this Bulgarian product — its uses and doses can differ.

Diclofenac has analgesic, anti-inflammatory, and antipyretic properties.

The mechanism of action of diclofenac, like that of other NSAIDs, is not completely understood but involves inhibition of cyclooxygenase (COX-1 and COX-2).

Half-life2 h
Mostly cleared after≈ 10 hfive half-lives — our arithmetic
How it leaves the body

Little or no free unchanged diclofenac is excreted in the urine.

With food

Food has no significant effect on the extent of diclofenac absorption.

Quoted from the prescribing label, sections “Mechanism of Action” and “Pharmacokinetics”. DailyMed · 2026-02-06

Safety of the active substance

This product’s leaflet is published as a scanned document. This section quotes the US prescribing label for the same active substance (diclofenac sodium). It describes the substance, not this Bulgarian product — its uses and doses can differ.

Serious warning

WARNING: RISK OF SERIOUS CARDIOVASCULAR AND GASTROINTESTINAL EVENTS Cardiovascular Thrombotic Events Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal.

Must not be used by
  • Diclofenac sodium delayed-release tablets are contraindicated in the following patients: Known hypersensitivity (e.g., anaphylactic reactions and serious skin reactions) to diclofenac or any components of the drug product ( see WARNINGS; Anaphylactic Reactions, Serious Skin Reactions ).
  • History of asthma, urticaria, or other allergic-type reactions after taking aspirin or other NSAIDs.
  • Severe, sometimes fatal, anaphylactic reactions to NSAIDs have been reported in such patients ( see WARNINGS; Anaphylactic Reaction, Exacerbation of Asthma Related to Aspirin Sensitivity ).
  • In the setting of coronary artery bypass graft (CABG) surgery ( see Warnings; Cardiovascular Thrombotic Events ).
Most common side effects

The most frequently reported adverse experiences occurring in approximately 1%-10% of patients are: Gastrointestinal experiences including: abdominal pain, constipation, diarrhea, dyspepsia, flatulence, gross bleeding/perforation, heartburn, nausea, GI ulcers (gastric/duodenal) and vomiting.

Quoted from the US prescribing label for the same active substance. Your own pack’s leaflet is the authority for your product. DailyMed

Same active substance, strength and form in other countries

Matched on active substance, strength and kind of form only. This is not a statement that the products are equivalent or interchangeable: other ingredients, release and approved uses can differ — ask a pharmacist before swapping.

Medicine passport: one printable page to show a pharmacist abroad

United StatesNo exact match for this strength and form

SpainNo exact match for this strength and form

CanadaNo exact match for this strength and form

SwitzerlandNo exact match for this strength and form

Details

Made byMedochemie Ltd. · Cyprus
Active substanceDiclofenac
Used inMuscles, joints and bones
Strength12.5 mg
Formfilm-coated tablets
Pack sizes24
ClassificationM01AB05 · Muscles, joints and bones
Name in the registerАрестон инстант 12,5 mg филмирани таблетки
Reg. no.20170284

Source: Bulgarian Drug Agency register · 2026-08-01 · not reviewed by a clinician

Източник: Изпълнителна агенция по лекарствата (ИАЛ). The publisher’s terms do not grant reproduction, so text is shortened and linked. Publisher’s terms.

Other strengths and forms

2 products are sold under this name. Grouped by form; a number on a strength means several companies make it.

  • film-coated tablets2 products

Same active substance

These contain the same substance. That does not mean one can replace another — ask a pharmacist.