{"id":7856,"date":"2026-04-17T23:45:07","date_gmt":"2026-04-17T23:45:07","guid":{"rendered":"https:\/\/bristishpharmacy.co.uk\/?post_type=product&#038;p=7856"},"modified":"2026-09-17T18:59:18","modified_gmt":"2026-09-17T18:59:18","slug":"concerta-18mg","status":"publish","type":"product","link":"https:\/\/bristishpharmacy.co.uk\/nl\/shop\/concerta-18mg\/","title":{"rendered":"Concerta 18mg"},"content":{"rendered":"<div class=\"container\">\n<div id=\"model-response-message-contentr_fa2697c2306ffbff\" class=\"markdown markdown-main-panel md-content enable-luminous-fast-follows enable-updated-hr-color stronger tutor-markdown-rendering\" dir=\"ltr\" aria-live=\"polite\">\n<h3 data-path-to-node=\"3\">Clinical Monograph: Concerta 18 mg (Methylphenidate HCl Extended-Release)<\/h3>\n<h2 data-path-to-node=\"4\">1. Classification and Chemical Overview<\/h2>\n<p data-path-to-node=\"5\">Methylphenidate hydrochloride is a synthetic piperidine derivative centrally acting sympathomimetic agent. Chemically designated as methyl <span class=\"math-inline\" data-math=\"\\alpha\" data-index-in-node=\"139\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">\u03b1<\/span><\/span><\/span><\/span><\/span>-phenyl-2-piperidineacetate hydrochloride. Under the Anatomical Therapeutic Chemical (ATC) system, methylphenidate is indexed under N06BA04.<\/p>\n<ul data-path-to-node=\"6\">\n<li>\n<p data-path-to-node=\"6,0,0\"><b data-path-to-node=\"6,0,0\" data-index-in-node=\"0\">Product Context:<\/b> Concerta 18 mg utilizes an advanced OROS (osmotic-controlled release oral system) tablet technology designed to deliver methylphenidate at a controlled rate over a 10- to 12-hour period, mimicking an idealized multi-dose regimen with a single morning administration.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"6,1,0\"><b data-path-to-node=\"6,1,0\" data-index-in-node=\"0\">Controlled Status:<\/b> Strictly regulated as a Prescription Only Medicine (POM) and a Schedule II Controlled Substance (or Class B \/ Schedule 2 Controlled Drug internationally) due to its stimulant properties, abuse liability, and psychological dependence potential.<\/p>\n<\/li>\n<\/ul>\n<h2 data-path-to-node=\"7\">2. Mechanism of Action and Pharmacodynamics<\/h2>\n<p data-path-to-node=\"8\">Methylphenidate functions by blocking the reuptake of key monoamine neurotransmitters:<\/p>\n<ul data-path-to-node=\"9\">\n<li>\n<p data-path-to-node=\"9,0,0\"><b data-path-to-node=\"9,0,0\" data-index-in-node=\"0\">DAT and NET Inhibition:<\/b> Binds to dopamine transporters (DAT) and norepinephrine transporters (NET) located on presynaptic neuronal membranes.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"9,1,0\"><b data-path-to-node=\"9,1,0\" data-index-in-node=\"0\">Synaptic Availability Enhancement:<\/b> Inhibits the reuptake of dopamine and norepinephrine into presynaptic neurons, increasing their extracellular concentrations within the synaptic cleft, particularly within the prefrontal cortex and striatum.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"9,2,0\"><b data-path-to-node=\"9,2,0\" data-index-in-node=\"0\">Pharmacodynamic Effect:<\/b> Enhances executive function, attention regulation, behavioral inhibition, and impulse control in patients with ADHD.<\/p>\n<\/li>\n<\/ul>\n<h2 data-path-to-node=\"10\">3. Approved Clinical Indications and Dosing Scope<\/h2>\n<p data-path-to-node=\"11\">Licensing for Concerta includes:<\/p>\n<ul data-path-to-node=\"12\">\n<li>\n<p data-path-to-node=\"12,0,0\"><b data-path-to-node=\"12,0,0\" data-index-in-node=\"0\">Attention Deficit Hyperactivity Disorder (ADHD):<\/b> Treatment of ADHD in children (aged 6 years and older), adolescents, and adults as part of a comprehensive treatment program.<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"13\"><i data-path-to-node=\"13\" data-index-in-node=\"0\">Dosing &amp; Administration Regimen:<\/i><\/p>\n<ul data-path-to-node=\"14\">\n<li>\n<p data-path-to-node=\"14,0,0\"><b data-path-to-node=\"14,0,0\" data-index-in-node=\"0\">Morning Administration:<\/b> Taken orally once daily in the morning with or without food. Avoid late-day dosing to prevent prolonged, severe insomnia.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"14,1,0\"><b data-path-to-node=\"14,1,0\" data-index-in-node=\"0\">Starting Strength:<\/b> The 18 mg tablet serves as the standard recommended starting dose for patients new to methylphenidate or when transitioning from other stimulant regimens.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"14,2,0\"><b data-path-to-node=\"14,2,0\" data-index-in-node=\"0\">Tablet Integrity:<\/b> Tablets <b data-path-to-node=\"14,2,0\" data-index-in-node=\"26\">must be swallowed whole<\/b> with liquid. <b data-path-to-node=\"14,2,0\" data-index-in-node=\"63\">Do not chew, crush, divide, or dissolve<\/b>, as the OROS delivery mechanism relies on a laser-drilled osmotic push-pull design; tampering with tablet integrity causes immediate drug dumping and potential toxicity.<\/p>\n<\/li>\n<\/ul>\n<h2 data-path-to-node=\"15\">4. Pharmacokinetic Profile and Metabolic Fate<\/h2>\n<ul data-path-to-node=\"16\">\n<li>\n<p data-path-to-node=\"16,0,0\"><b data-path-to-node=\"16,0,0\" data-index-in-node=\"0\">Absorption:<\/b> Following oral ingestion, the outer drug coating dissolves to provide an initial immediate-release pulse within 1 to 2 hours. Osmotic pressure then forces active methylphenidate through the laser-drilled membrane at a controlled rate, producing gradually rising plasma concentrations that peak at 6 to 8 hours post-dose.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"16,1,0\"><b data-path-to-node=\"16,1,0\" data-index-in-node=\"0\">Distribution:<\/b> Rapidly distributes into body tissues. Plasma protein binding is low (~12% to 15%). Crosses the blood-brain barrier.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"16,2,0\"><b data-path-to-node=\"16,2,0\" data-index-in-node=\"0\">Biotransformation:<\/b> Extensively metabolized in the liver and through non-hepatic pathways primarily by carboxylesterase (specifically CES1A1), converting methylphenidate into its major inactive metabolite, <b data-path-to-node=\"16,2,0\" data-index-in-node=\"205\"><span class=\"math-inline\" data-math=\"\\alpha\" data-index-in-node=\"205\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">\u03b1<\/span><\/span><\/span><\/span><\/span>-phenyl-piperidine acetic acid<\/b> (PPAA).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"16,3,0\"><b data-path-to-node=\"16,3,0\" data-index-in-node=\"0\">Elimination:<\/b> Excreted predominantly via the kidneys in urine (~90% as PPAA metabolites) and in feces (~1% to 3% as unchanged drug). The terminal elimination half-life averages 3.5 hours, though sustained systemic absorption extends the effective pharmacodynamic duration to roughly 12 hours.<\/p>\n<\/li>\n<\/ul>\n<h2 data-path-to-node=\"17\">5. Physiological Effects and Adverse Event Spectrum<\/h2>\n<p data-path-to-node=\"18\">Concerta stimulates sympathetic outflow, accelerating heart rate, elevating blood pressure, and suppressing appetite.<\/p>\n<h3 data-path-to-node=\"19\">Adverse Drug Reaction Spectrum<\/h3>\n<ul data-path-to-node=\"20\">\n<li>\n<p data-path-to-node=\"20,0,0\"><b data-path-to-node=\"20,0,0\" data-index-in-node=\"0\">Very Common (<span class=\"math-inline\" data-math=\"\\ge 1\/10\" data-index-in-node=\"13\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<\/span><\/span><span class=\"base\"><span class=\"mord\">1\/10<\/span><\/span><\/span><\/span><\/span>):<\/b> Decreased appetite, insomnia, headache, upper abdominal pain, nausea, dry mouth.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"20,1,0\"><b data-path-to-node=\"20,1,0\" data-index-in-node=\"0\">Common (<span class=\"math-inline\" data-math=\"\\ge 1\/100\" data-index-in-node=\"8\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<\/span><\/span><span class=\"base\"><span class=\"mord\">1\/100<\/span><\/span><\/span><\/span><\/span> to <span class=\"math-inline\" data-math=\"&lt;1\/10\" data-index-in-node=\"21\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">&lt;<\/span><\/span><span class=\"base\"><span class=\"mord\">1\/10<\/span><\/span><\/span><\/span><\/span>):<\/b> Tachycardia, palpitations, anxiety, emotional lability, dizziness, weight loss, restlessness, hyperhidrosis, bruxism, nasopharyngitis, diarrhea.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"20,2,0\"><b data-path-to-node=\"20,2,0\" data-index-in-node=\"0\">Uncommon (<span class=\"math-inline\" data-math=\"\\ge 1\/1,000\" data-index-in-node=\"10\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<\/span><\/span><span class=\"base\"><span class=\"mord\">1\/1<\/span><span class=\"mpunct\">,<\/span><span class=\"mord\">000<\/span><\/span><\/span><\/span><\/span> to <span class=\"math-inline\" data-math=\"&lt;1\/100\" data-index-in-node=\"25\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">&lt;<\/span><\/span><span class=\"base\"><span class=\"mord\">1\/100<\/span><\/span><\/span><\/span><\/span>):<\/b> Hypertension, vision blurred, tremor, rash, pruritus, depressed mood, fatigue, suicidal ideation.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"20,3,0\"><b data-path-to-node=\"20,3,0\" data-index-in-node=\"0\">Rare \/ Severe (&lt;1\/1,000):<\/b> Psychotic episodes, hallucinations, cerebrovascular accidents, myocardial infarction, sudden cardiac death in vulnerable individuals, priapism, Raynaud&#8217;s phenomenon.<\/p>\n<\/li>\n<\/ul>\n<h2 data-path-to-node=\"21\">6. Contraindications, Drug Interactions, and Clinical Precautions<\/h2>\n<h3 data-path-to-node=\"22\">Contra-indicaties<\/h3>\n<ul data-path-to-node=\"23\">\n<li>\n<p data-path-to-node=\"23,0,0\">Known hypersensitivity to methylphenidate or formulation excipients.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"23,1,0\">Concomitant use with Monoamine Oxidase Inhibitors (MAOIs) or within 14 days of their cessation (risk of severe hypertensive crisis).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"23,2,0\">Marked anxiety, tension, or agitation (as stimulants can exacerbate these states).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"23,3,0\">Glaucoma, pheochromocytoma, or advanced arteriosclerosis\/symptomatic cardiovascular disease.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"24\">Key Drug Interactions<\/h3>\n<ul data-path-to-node=\"25\">\n<li>\n<p data-path-to-node=\"25,0,0\"><b data-path-to-node=\"25,0,0\" data-index-in-node=\"0\">Monoamine Oxidase Inhibitors (MAOIs):<\/b> Concurrent administration triggers severe hypertensive crises and dangerous hyperthermia.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"25,1,0\"><b data-path-to-node=\"25,1,0\" data-index-in-node=\"0\">Antihypertensives &amp; Vasopressors:<\/b> Stimulants can antagonize the blood pressure-lowering efficacy of antihypertensive drugs and amplify cardiovascular effects of pressor agents.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"25,2,0\"><b data-path-to-node=\"25,2,0\" data-index-in-node=\"0\">Serotonergic Agents:<\/b> While less common than with amphetamines, concurrent use with potent serotonergic compounds warrants monitoring for serotonin syndrome symptoms.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"26\">Clinical Precautions and Monitoring<\/h3>\n<ul data-path-to-node=\"27\">\n<li>\n<p data-path-to-node=\"27,0,0\"><b data-path-to-node=\"27,0,0\" data-index-in-node=\"0\">Boxed Warning (Abuse, Misuse, and Dependence):<\/b> CNS stimulants have a high potential for abuse and dependence. Assess clinical risk prior to prescribing and monitor patients regularly for signs of misuse, diversion, or dose escalation.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"27,1,0\"><b data-path-to-node=\"27,1,0\" data-index-in-node=\"0\">Cardiovascular Evaluation &amp; Monitoring:<\/b> Evaluate baseline cardiac health prior to initiating therapy. Routinely monitor blood pressure and heart rate throughout treatment.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"27,2,0\"><b data-path-to-node=\"27,2,0\" data-index-in-node=\"0\">Gastrointestinal Obstruction Risk:<\/b> Because the OROS tablet does not change shape in the gastrointestinal tract, use with extreme caution in patients with preexisting severe gastrointestinal narrowing or motility disorders.<\/p>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n    <div class=\"xs_social_share_widget xs_share_url after_content \t\tmain_content  wslu-style-1 wslu-share-box-shaped wslu-fill-colored wslu-none wslu-share-horizontal wslu-theme-font-no wslu-main_content\">\n\n\t\t\n        <ul>\n\t\t\t        <\/ul>\n    <\/div>","protected":false},"excerpt":{"rendered":"<p data-path-to-node=\"1\">Concerta 18 mg is a brand-name extended-release oral tablet formulation containing methylphenidate hydrochloride. As a central nervous system (CNS) stimulant, it utilizes an osmotic controlled-release delivery system to provide all-day symptom management for Attention Deficit Hyperactivity Disorder (ADHD).<\/p>\n<h3 data-path-to-node=\"3\">\u00a0<\/h3>","protected":false},"featured_media":7857,"comment_status":"closed","ping_status":"closed","template":"","meta":{"postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""}},"product_brand":[],"product_cat":[15],"product_tag":[221],"class_list":["post-7856","product","type-product","status-publish","has-post-thumbnail","product_cat-uncategorized","product_tag-concerta-18mg","instock","shipping-taxable","purchasable","product-type-variable"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.5 (Yoast SEO v28.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Concerta 18mg - British Pharmacy<\/title>\n<meta name=\"description\" content=\"Concerta 18 mg is a brand-name extended-release oral tablet formulation containing methylphenidate hydrochloride. 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