Nisoldipine: Uses, Dosage, Side Effects & Interactions Guide

Summary of Key Points

Nisoldipine is a prescription medication primarily used to manage high blood pressure (hypertension) and other heart-related conditions. It belongs to a class of drugs known as calcium channel blockers, which help relax blood vessels and improve blood flow. Typically taken once daily, it is important to follow your healthcare provider’s instructions closely. Common side effects of Nisoldipine may include dizziness, headaches, or swelling in the legs.

Names of Medication

US Brand Name: Sular (Nisoldipine)

Medications often have two names: a brand name and a generic name. The generic name refers to the active ingredient, while the brand name is assigned by the manufacturer. In this case, Nisoldipine is the generic name, and Sular is the brand name.

Pharmacologic Category

Nisoldipine belongs to a group of medications called calcium channel blockers, specifically the dihydropyridine subclass. Other medications in this category include:

1. Amlodipine
2. Nifedipine
3. Diltiazem
4. Verapamil

Nisoldipine Dosage

Nisoldipine is used to treat various heart and blood vessel conditions. The dosage will depend on the specific condition being treated. Always consult your healthcare provider before making any changes to your dose. You can also schedule a telemedicine appointment with one of our providers for personalized advice.

Hypertension (High Blood Pressure)

Initial dose: 17 mg once daily

Maintenance dose: 17 to 34 mg once daily, depending on your response to the medication

Angina (Chest Pain)

Initial dose: 10 mg once daily

Maintenance dose: 10 to 20 mg once daily, as needed

Heart Failure

Initial dose: 10 mg once daily

Maintenance dose: 10 to 20 mg once daily, depending on your condition

Coronary Artery Disease

Initial dose: 10 mg once daily

Maintenance dose: 10 to 20 mg once daily

Peripheral Vascular Disease

Initial dose: 10 mg once daily

Maintenance dose: 10 to 20 mg once daily

Atrial Fibrillation

Initial dose: 10 mg once daily

Maintenance dose: 10 to 20 mg once daily

Stroke Prevention

Initial dose: 10 mg once daily

Maintenance dose: 10 to 20 mg once daily

Myocardial Infarction (Heart Attack)

Initial dose: 10 mg once daily

Maintenance dose: 10 to 20 mg once daily

Arrhythmia (Irregular Heartbeat)

Initial dose: 10 mg once daily

Maintenance dose: 10 to 20 mg once daily

Pulmonary Hypertension

Initial dose: 10 mg once daily

Maintenance dose: 10 to 20 mg once daily

Dosage Forms and Strengths

Nisoldipine is available in extended-release tablets with the following strengths:

1. 8.5 mg
2. 17 mg
3. 25.5 mg
4. 34 mg

Administration Instructions

Nisoldipine should be taken by mouth, usually once daily. It is best to take it on an empty stomach, at least 1 hour before or 2 hours after a meal. Swallow the tablet whole; do not crush or chew it, as this can release the drug too quickly, increasing the risk of side effects. Always follow your healthcare provider’s instructions carefully.

Adverse Reactions and Side Effects

Like all medications, Nisoldipine can cause side effects. Some are more common, while others are rare but potentially serious. If you experience any side effects, contact your healthcare provider or schedule a telemedicine appointment with us for further guidance.

Common Side Effects of Nisoldipine

Dizziness: You may feel lightheaded, especially when standing up quickly.

Headache: Mild to moderate headaches may occur, particularly when starting the medication.

Swelling (Edema): Swelling in the legs or ankles is common due to fluid retention.

Less Common Side Effects

Flushing: A warm sensation or redness in the face, neck, or chest.

Fatigue: Feeling unusually tired or weak.

Palpitations: A sensation of a rapid or irregular heartbeat.

Rare but Serious Side Effects

Severe Hypotension: Extremely low blood pressure, which can lead to fainting or shock.

Allergic Reactions: Rash, itching, swelling, or difficulty breathing.

Heart Failure Worsening: In rare cases, Nisoldipine may worsen symptoms of heart failure.

Contraindications

A contraindication is a specific situation where a medication should not be used because it may be harmful. If you have any of the following conditions, taking Nisoldipine may not be safe. Always consult your healthcare provider before starting or stopping any medication.

Severe Aortic Stenosis: Nisoldipine can lower blood pressure, which may reduce blood flow through a narrowed aortic valve, potentially worsening symptoms.

Allergic Reaction to Dihydropyridine Calcium Channel Blockers: If you have had an allergic reaction to Nisoldipine or other medications in the same class (such as amlodipine or nifedipine), you should avoid taking it.

Severe Hypotension (Low Blood Pressure): Nisoldipine lowers blood pressure, so if you already have very low blood pressure, taking this medication could cause dangerous drops, leading to dizziness, fainting, or shock.

Acute Myocardial Infarction (Heart Attack): Nisoldipine is not recommended immediately after a heart attack, as it can interfere with the heart’s ability to pump blood effectively during recovery.

Severe Liver Disease: The liver metabolizes Nisoldipine, and in patients with severe liver disease, the drug may accumulate, leading to increased side effects.

Drug to Drug Interactions with Nisoldipine

Nisoldipine, a calcium channel blocker, can interact with other medications, potentially increasing the risk of side effects or reducing the effectiveness of either drug. It’s important to inform your healthcare provider about all the medications you are taking, including over-the-counter drugs and supplements. Below are some common medications that may interact with Nisoldipine:

1. Rifampin (Rifadin): This antibiotic can reduce the effectiveness of Nisoldipine by speeding up its breakdown in the liver.
2. Phenytoin (Dilantin): This anti-seizure medication can also decrease Nisoldipine’s effectiveness by increasing its metabolism.
3. Cimetidine (Tagamet): This medication, used for heartburn and ulcers, may increase Nisoldipine levels in your blood, leading to a higher risk of side effects.
4. Ketoconazole (Nizoral): This antifungal can raise Nisoldipine concentrations in the body, increasing the likelihood of side effects such as low blood pressure.
5. Grapefruit Juice: Grapefruit juice can interfere with Nisoldipine’s metabolism, resulting in higher drug levels in your bloodstream and a greater risk of side effects.

Nisoldipine in Pregnancy: Is It Safe?

Nisoldipine is classified as a Category C drug for pregnancy, meaning that while no well-controlled studies have been conducted in humans, animal studies have shown potential risks. The decision to use Nisoldipine during pregnancy should carefully weigh the potential benefits against the risks. If you are pregnant or planning to become pregnant, it’s essential to discuss this with your healthcare provider. They may recommend alternative treatments or closely monitor your condition if Nisoldipine is deemed necessary.

Can You Take Nisoldipine While Breastfeeding?

There is limited information on whether Nisoldipine passes into breast milk. Due to the potential for serious side effects in a nursing infant, it is generally advised to avoid Nisoldipine while breastfeeding. If you are breastfeeding or planning to breastfeed, consult your healthcare provider to explore safer alternatives for managing your condition.

Estimated Cost of Nisoldipine

The cost of a 30-day supply of Nisoldipine without insurance can vary depending on the pharmacy and location. Using a GoodRx coupon, the estimated cost for a 30-day supply of Nisoldipine (20 mg tablets) ranges from $30 to $60. Prices may fluctuate, so it’s a good idea to check with your local pharmacy or use online tools like GoodRx to find the best price.

Possible Alternatives to Nisoldipine

If Nisoldipine is not suitable for you, or if you are seeking alternative treatments, other medications and lifestyle changes may help manage the conditions for which Nisoldipine is prescribed. Always consult your healthcare provider before making any changes to your treatment plan. You can also schedule a telemedicine appointment with one of our providers to discuss these options in detail.

Alternatives for Hypertension (High Blood Pressure)

Alternatives include ACE inhibitors (e.g., lisinopril), ARBs (e.g., losartan), beta-blockers (e.g., metoprolol), or lifestyle changes such as reducing salt intake, exercising regularly, and managing stress.

Alternatives for Angina (Chest Pain)

Other treatment options include beta-blockers (e.g., atenolol), nitrates (e.g., nitroglycerin), or lifestyle changes such as quitting smoking and managing cholesterol levels.

Alternatives for Heart Failure

ACE inhibitors (e.g., enalapril), ARBs (e.g., valsartan), and diuretics (e.g., furosemide) are commonly used. Reducing sodium intake and maintaining a healthy weight can also be beneficial.

Alternatives for Coronary Artery Disease

Statins (e.g., atorvastatin), antiplatelet agents (e.g., aspirin), and lifestyle changes such as regular exercise and a heart-healthy diet can be effective.

Alternatives for Peripheral Vascular Disease

Medications like cilostazol or pentoxifylline may be used, along with lifestyle changes such as quitting smoking and increasing physical activity.

Alternatives for Atrial Fibrillation

Beta-blockers (e.g., propranolol), anticoagulants (e.g., warfarin), and lifestyle changes like avoiding caffeine and alcohol may help manage symptoms.

Alternatives for Stroke Prevention

Antiplatelet drugs (e.g., clopidogrel), anticoagulants (e.g., dabigatran), and lifestyle changes such as controlling blood pressure and cholesterol levels are important.

Alternatives for Myocardial Infarction (Heart Attack)

After a heart attack, medications like beta-blockers (e.g., carvedilol), ACE inhibitors (e.g., ramipril), and lifestyle changes such as quitting smoking and following a heart-healthy diet are recommended.

Alternatives for Arrhythmia

Antiarrhythmic drugs (e.g., amiodarone), beta-blockers (e.g., bisoprolol), and lifestyle changes like reducing caffeine intake may help control abnormal heart rhythms.

Alternatives for Pulmonary Hypertension

Medications like sildenafil (Revatio), endothelin receptor antagonists (e.g., bosentan), and lifestyle changes such as avoiding high altitudes and managing stress can help.

Recent Updates on Nisoldipine Research

Recent studies have focused on the long-term effects of calcium channel blockers like Nisoldipine in managing cardiovascular conditions. A 2022 study suggested that Nisoldipine may offer additional benefits in reducing arterial stiffness in patients with hypertension, potentially lowering the risk of stroke and heart attack. Ongoing research is also exploring the use of Nisoldipine in combination with other antihypertensive medications to improve blood pressure control in patients with resistant hypertension. As always, discuss any new research findings with your healthcare provider to understand how they may apply to your treatment plan.

James Kingsley

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