Amlodipine Besylate 5mg Tablets

Amlodipine is a dihydropyridine calcium channel blocker that inhibits the transmembrane influx of calcium ions into vascular smooth muscle and cardiac muscle. This leads to direct relaxation of vascular smooth muscle, resulting in peripheral arterial vasodilation and reduction in peripheral vascular resistance, which lowers blood pressure. In angina, it reduces total peripheral resistance (afterload) and dilates coronary arteries and arterioles, increasing myocardial oxygen delivery.

Urgent Side Effects: Seek Medical Help Right Away

While rare, some people may experience severe and potentially life-threatening side effects when taking this medication. If you notice any of the following symptoms, contact your doctor immediately or seek emergency medical attention:

Signs of an allergic reaction, such as:
+ Rash
+ Hives
+ Itching
+ Red, swollen, blistered, or peeling skin with or without fever
+ Wheezing
+ Tightness in the chest or throat
+ Trouble breathing, swallowing, or talking
+ Unusual hoarseness
+ Swelling of the mouth, face, lips, tongue, or throat
Signs of liver problems, including:
+ Dark urine
+ Tiredness
+ Decreased appetite
+ Upset stomach or stomach pain
+ Light-colored stools
+ Vomiting
+ Yellow skin or eyes
Severe dizziness or fainting
New or worsening chest pain
Fast or abnormal heartbeat
Swelling
Stiff muscles, shakiness, or abnormal muscle movements

Other Possible Side Effects

Like all medications, this drug can cause side effects. Many people may not experience any side effects or may only have mild ones. If you notice any of the following side effects or any other symptoms that concern you or do not go away, contact your doctor:

Dizziness
Drowsiness
Fatigue
Weakness
Flushing
Upset stomach
Stomach pain

Reporting Side Effects

This is not an exhaustive list of possible side effects. If you have questions or concerns about side effects, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.

Before Taking This Medication: Important Information to Share with Your Doctor

It is essential to inform your doctor about the following:

Any allergies you have, including allergies to this medication, any of its components, or other substances, such as foods or drugs. Be sure to describe the allergic reaction you experienced, including any symptoms that occurred.
All medications you are currently taking, including prescription and over-the-counter (OTC) drugs, natural products, and vitamins. This is crucial to ensure safe use and avoid potential interactions.
* Any existing health problems, as this medication may interact with other medical conditions.

To guarantee your safety, it is vital to verify that this medication can be taken with all your current medications and health conditions. Never start, stop, or adjust the dose of any medication without first consulting your doctor.

Important Warnings and Cautions

When taking this medication, it is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, about your treatment.

To ensure your safety, avoid driving and other activities that require alertness until you understand how this medication affects you. To minimize the risk of dizziness or fainting, rise slowly from a sitting or lying position, and exercise caution when climbing stairs.

Regularly monitor your blood pressure as directed by your healthcare provider. Be aware that this medication may rarely cause new or worsening chest pain, which can increase the risk of a heart attack, particularly in individuals with severe heart blood vessel disease. If you experience any chest pain, consult your doctor promptly.

If you have high blood pressure, consult your doctor before using over-the-counter (OTC) products that may increase blood pressure, such as cough or cold medications, diet pills, stimulants, non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen, and certain natural products or aids.

It is also important to discuss alcohol consumption with your doctor before drinking while taking this medication. Additionally, be aware that liver problems have occurred with this medication, sometimes requiring hospitalization. Inform your doctor about any concerns.

If you are 65 years or older, use this medication with caution, as you may be more susceptible to side effects. Pregnant or breastfeeding women, or those planning to become pregnant, should discuss the benefits and risks of this medication with their doctor.

Specific Instructions for Chest Pain

Do not use this medication to treat sudden chest pain, as it will not provide relief. Instead, consult your doctor for appropriate treatment.

• Simvastatin (increased simvastatin exposure, risk of myopathy/rhabdomyolysis)
• Strong CYP3A4 inhibitors (e.g., ketoconazole, itraconazole, ritonavir, clarithromycin) - may significantly increase amlodipine exposure, leading to hypotension and edema.
• Dantrolene (IV) - risk of hyperkalemia and cardiovascular collapse in association with verapamil and diltiazem, theoretical risk with amlodipine.

• CYP3A4 inducers (e.g., rifampin, carbamazepine, phenytoin, phenobarbital, St. John's Wort) - may decrease amlodipine exposure, reducing efficacy.
• Sildenafil and other PDE5 inhibitors - additive hypotensive effects.
• Tacrolimus - increased tacrolimus blood levels (monitor tacrolimus levels).

• Grapefruit juice - may increase amlodipine exposure, but generally not clinically significant with typical consumption.
• NSAIDs - may attenuate the antihypertensive effect of amlodipine.

• Dizziness
• Headache
• Flushing
• Palpitations
• Fatigue
• Nausea
• Abdominal pain
• Somnolence
• Peripheral edema (especially ankle/pedal edema)

Amlodipine is Pregnancy Category C. There are no adequate and well-controlled studies in pregnant women. Use during pregnancy only if the potential benefit justifies the potential risk to the fetus. Animal studies have shown adverse effects at doses higher than the maximum recommended human dose.

Amlodipine is present in human milk. There is no information on the effects of amlodipine on the breastfed infant or on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for amlodipine and any potential adverse effects on the breastfed infant from amlodipine or from the underlying maternal condition. The American Academy of Pediatrics considers amlodipine to be compatible with breastfeeding.

Safety and effectiveness have been established for hypertensive pediatric patients 6-17 years of age. Dosing is typically 2.5 mg once daily, with a maximum of 5 mg once daily. Not recommended for children younger than 6 years due to lack of data.

Clearance of amlodipine is decreased in elderly patients, resulting in increased AUC and elimination half-life. Start with the lowest dose (2.5 mg once daily) and titrate slowly. Monitor closely for hypotension and edema.

• Amlodipine has a very long half-life, allowing for once-daily dosing and providing smooth blood pressure control over 24 hours.
• Peripheral edema (especially ankle edema) is a common dose-dependent side effect, occurring in up to 10-30% of patients at higher doses. It is often managed by reducing the dose, adding an ACE inhibitor/ARB, or using a diuretic (though diuretics are less effective for CCB-induced edema).
• Unlike some other calcium channel blockers, amlodipine has minimal negative inotropic effects at therapeutic doses and can be used safely in patients with compensated heart failure.
• It is a preferred calcium channel blocker for patients with asthma or COPD due to its lack of bronchoconstrictive effects.
• Amlodipine is not associated with reflex tachycardia as much as some other dihydropyridine CCBs due to its gradual onset of action.

• Other Dihydropyridine Calcium Channel Blockers (e.g., Felodipine, Nifedipine, Nicardipine)
• Non-Dihydropyridine Calcium Channel Blockers (e.g., Verapamil, Diltiazem)
• ACE Inhibitors (e.g., Lisinopril, Enalapril)
• Angiotensin Receptor Blockers (ARBs) (e.g., Valsartan, Losartan)
• Thiazide Diuretics (e.g., Hydrochlorothiazide, Chlorthalidone)
• Beta-Blockers (e.g., Metoprolol, Atenolol)
• Alpha-Blockers (e.g., Doxazosin, Terazosin)

If your symptoms or health issues persist or worsen, it's essential to contact your doctor for further guidance. To ensure your safety, never share your medication with others or take someone else's medication. Some medications may come with an additional patient information leaflet, so be sure to check with your pharmacist for more information. If you have any questions or concerns about this medication, don't hesitate to reach out to your doctor, nurse, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When reporting the incident, be prepared to provide details about the medication taken, the amount, and the time it occurred.