Buflomedil

MECHANISM OF ACTION

Buflomedil is a vasodilator that works by relaxing vascular smooth muscle and improving blood flow in arteries and capillaries. It also reduces peripheral vascular resistance and may act on the nervous system to enhance tissue perfusion, helping relieve symptoms like leg pain and cramping caused by poor circulation.

PHARMACOKINETICS

Absorption

Buflomedil is well absorbed after oral administration, with peak plasma concentrations typically reached within 1–2 hours. It distributes moderately in body tissues and binds partially to plasma proteins, allowing effective delivery to peripheral blood vessels where it exerts its vasodilatory effects.

Distribution

Buflomedil has a volume of distribution (Vd) of approximately 3–4 L/kg and is moderately bound (about 90%) to plasma proteins, allowing it to distribute effectively to peripheral tissues.

Metabolism

Buflomedil is primarily metabolized in the liver through oxidation and conjugation, producing inactive metabolites that are eventually excreted.

Excretion

Buflomedil is primarily excreted through the urine, mostly as inactive metabolites formed in the liver, while a smaller portion is eliminated via the feces. This renal and fecal excretion helps clear the drug from the body and prevents accumulation during normal use.

PHARMACODYNAMICS

Buflomedil is a vasodilator that improves blood flow by relaxing vascular smooth muscle and reducing peripheral vascular resistance. This action enhances oxygen delivery to tissues, relieves symptoms like leg pain and cramping in peripheral artery disease, and improves overall tissue perfusion.

ADMINISTRATION

Buflomedil can be administered orally as tablets or intravenously in injectable form, depending on the severity of the vascular condition being treated.

DOSAGE AND STRENGTH

• Oral tablets: 100–200 mg, 2–3 times daily, depending on severity and patient tolerance

• Injectable solution: 100–200 mg diluted for intravenous infusion, usually once or twice daily

FOOD INTERACTIONS

Buflomedil has no significant food interactions, but it is generally recommended to take oral tablets with water and consistently with or without meals to maintain steady absorption.

DRUG INTERACTIONS

• Other vasodilators – may increase the risk of low blood pressure or dizziness

• Antihypertensives – additive blood pressure-lowering effects

• CYP3A4 inhibitors or inducers – can alter Buflomedil metabolism, affecting its effectiveness or toxicity

CONTRAINDICATIONS

• Severe hypotension or low blood pressure

• Acute heart failure or recent myocardial infarction

• Severe kidney or liver impairment

• Known hypersensitivity to Buflomedil

SIDE EFFECTS

• Cardiovascular: low blood pressure, palpitations, dizziness

• Neurological: headache, flushing, tingling, or numbness

• Gastrointestinal: nausea, vomiting, abdominal discomfort

• Rare but serious: arrhythmias, hypotensive shock, or allergic reactions

OVERDOSE

• Cardiovascular: dangerously low blood pressure, irregular heartbeat, or shock

• Neurological: dizziness, confusion, fainting, or seizures

• Gastrointestinal: nausea and vomiting

TOXICITY

Buflomedil toxicity is rare but can occur with high doses or prolonged use. It primarily affects the cardiovascular and nervous systems, causing hypotension, arrhythmias, dizziness, confusion, or, in severe cases, shock. Early detection and supportive care are essential to prevent serious complications.