The pill debossed with the imprint 210 is a generic formulation of Amlodipine Besylate (5 mg). Manufactured by pharmaceutical companies such as Ascend Laboratories, this medication is widely recognized by its original brand name, Norvasc. It belongs to a class of medications called calcium channel blockers (CCBs) and is primarily prescribed to manage cardiovascular conditions such as chronic high blood pressure and chest pain.
Pill Identification
An authentic 5 mg Amlodipine Besylate tablet bearing the “210” imprint has a distinct presentation to distinguish it from other strengths or drugs:
- Imprint: “210” is clearly debossed on one side. The opposite side is completely plain.
- Color: White to off-white.
- Shape: Round (some generic alternatives may present as octagonal with a score line, but the “210” flat-faced, bevel-edged tablet is typically round).
- Strength: Contains 5 mg of amlodipine active base.
Mechanism of Action
Amlodipine Besylate is a dihydropyridine calcium channel blocker. It manages cardiovascular stress by regulating the movement of calcium ions across cellular structures.
During periods of cellular excitation, calcium enters vascular smooth muscle cells and cardiac muscle cells through voltage-dependent L-type calcium channels. Amlodipine specifically inhibits the influx of these calcium ions. By blocking this pathway, it prevents the contraction of smooth muscle surrounding the arteries.
The primary physiological results include:
- Vasodilation: The smooth muscles in the walls of the blood vessels relax, causing the arteries to widen. This significantly lowers peripheral vascular resistance, making it much easier for the heart to pump blood, which reduces systemic blood pressure.
- Angina Relief: By dilating the main coronary arteries and arterioles, amlodipine increases the overall delivery of oxygen-rich blood to the myocardial tissue (the heart muscle). Simultaneously, by lowering blood pressure, it reduces the workload and total oxygen demand of the heart, preventing ischemic chest pain (angina).
Indications & Dosage
Amlodipine is a long-acting medication designed for once-daily dosing. It has a slow onset of action and a prolonged therapeutic duration, achieving a steady state in the body over several days.
Clinical Indications
- Hypertension: Used alone or in combination with other blood pressure medications (like ACE inhibitors or diuretics) to lower blood pressure and mitigate the long-term risk of strokes and heart attacks.
- Coronary Artery Disease (CAD):
- Chronic Stable Angina: For the symptomatic treatment of predictable exertional chest pain.
- Vasospastic Angina (Prinzmetal’s or Variant Angina): For treating chest pain caused by sudden spasms of the coronary arteries.
Standard Dosage Framework
Dosages are highly individualized based on patient tolerance and clinical response.
Patient Population Standard Starting Dose Maximum Daily Dose
- Adults (Hypertension/Angina) 5 mg orally once daily 10 mg once daily
- Pediatric (Ages 6 to 17) 2.5 mg to 5 mg once daily 5 mg once daily
- Elderly / Hepatically Impaired 2.5 mg once daily 10 mg once daily
- Note: Because the “210” pill is a solid 5 mg tablet without a score line, patients requiring a 2.5 mg dose must be prescribed a separate 2.5 mg tablet formulation (typically debossed with a “211” imprint).
Side Effects
While amlodipine is generally well-tolerated, its vasodilatory properties can cause noticeable side effects as the body adjusts to altered blood flow.
Common Side Effects
- Peripheral Edema: Swelling in the lower extremities (ankles and feet) due to fluid shifting out of dilated blood vessels into surrounding tissue. This is the most frequently reported side effect.
- Flushing & Warmth: A sudden feeling of warmth or redness in the face, neck, or chest.
- Dizziness or Lightheadedness: Particularly when standing up quickly, as the body adapts to lower blood pressure.
- Fatigue: General feelings of unusual tiredness or sleepiness.
- Palpitations: A sensation of a racing or pounding heartbeat, which often subsides over time.
Rare but Serious Side Effects
- Worsening Chest Pain or Heart Attack: Infrequently, when first starting amlodipine or increasing the dose, patients with severe obstructive coronary artery disease can experience increased frequency, duration, or severity of angina, or even an acute myocardial infarction (heart attack).
- Severe Hypotension: An excessive drop in blood pressure leading to fainting (syncope).
Warnings & Precautions
To ensure safe administration, certain medical conditions and drug interactions require close monitoring by a healthcare professional.
Precautions
- Hepatic Impairment: Amlodipine is extensively metabolized by the liver. Because its half-life is prolonged in patients with impaired liver function, dosage titration must proceed slowly and cautiously.
- Aortic Stenosis: Caution should be exercised in patients with severe aortic stenosis (narrowing of the heart’s aortic valve), as extreme vasodilation could potentially trigger a critical reduction in cardiac output.
- Pregnancy and Lactation: Amlodipine should only be used during pregnancy if the potential clinical benefit outweighs the potential risk to the fetus. It can pass into breast milk in small amounts; consulting a physician is necessary for lactating mothers.
Drug Interactions to Avoid
- Simvastatin: Amlodipine can increase systemic exposure to simvastatin (a cholesterol medication), elevating the risk of myopathy and rhabdomyolysis (severe muscle breakdown). Daily simvastatin doses should typically be capped at 20 mg when co-administered.
- CYP3A4 Inhibitors & Inducers: Strong inhibitors of the CYP3A4 enzyme (such as ketoconazole, clarithromycin, or grapefruit juice) can increase amlodipine concentrations in the blood. Conversely, enzyme inducers (like rifampin) can lower its effectiveness.