Nidipine SR is a medication containing Nifedipine in a sustained-release (SR) formulation. Nifedipine belongs to a class of drugs called calcium channel blockers. It is primarily used to treat cardiovascular conditions.

Indications:

Nidipine SR is indicated for the management of:

• Hypertension (high blood pressure): It helps to lower blood pressure by relaxing blood vessels, making it easier for the heart to pump blood.
• Angina pectoris (chest pain due to heart disease): It helps to prevent chest pain by widening the blood vessels supplying the heart, increasing blood flow and reducing the heart's workload.
• Other conditions as determined by a physician, which may include Raynaud's phenomenon and certain types of heart failure.

Dosage and Administration:

• The dosage of Nidipine SR varies depending on the individual's condition and response to treatment. It is crucial to follow your doctor's instructionsprecisely.
• The starting dose for hypertension is usually one 20 mg tablet once daily. The recommended dose in hypertension and angina prophylaxis is 20 mg twice daily during or after food. 
• Dosage may be adjusted by your doctor within the range of 10 mg twice daily to 40 mg twice daily.
• Patients with liver dysfunction may require a lower starting dose and careful monitoring.
• Nidipine SR tablets should be swallowed whole and should not be bitten, chewed, or broken up.
• It is usually taken with food. Take it at the same time each day to help you remember.

Contraindications:

Nidipine SR is contraindicated in patients with: 

• Cardiogenic shock 
• Advanced aortic stenosis 
• Nursing mothers 
• Gastrointestinal obstruction 
• Inflammatory bowel disease 
• Hypotension (low blood pressure)

Side Effects:

Common side effects may include:

• Headache
• Flushing (feeling of warmth and redness)
• Lethargy (fatigue)
• Dizziness
• Gravitational edema (swelling of ankles and feet)
• Rash
• Nausea
• Increased frequency of urination
• Eye pain
• Gum hyperplasia (swelling of the gums)
• Depression
• Tremor
• Photosensitivity

Less common but potentially serious side effects can occur. If you experience any unusual or severe symptoms, contact your doctor immediately.

Precautions:

• Use with caution in patients with poor cardiac reserve.
• It should be withdrawn if ischemic pain occurs or existing pain worsens shortly after starting treatment.
• Use in diabetic patients may require adjustment of their blood sugar control.
• Caution should be exercised in patients with renal disease as it may affect drug absorption.
• Avoid consuming alcohol while taking Nidipine SR as it can enhance the hypotensive effect.
• Inform your doctor if you are pregnant or planning to become pregnant. Use during pregnancy should only occur if the potential benefit justifies the potential risk to the fetus.
• Nidipine SR is probably safe to use during breastfeeding; however, consult your doctor.

Drug Interactions:

Nidipine SR can interact with various other medications. Inform your doctor if you are taking:

• ACE inhibitors
• Anti-arrhythmics (e.g., quinidine)
• Anti-bacterials (e.g., rifampicin)
• Anti-epileptics (e.g., phenytoin)
• Antipsychotics
• Beta-blockers
• Cyclosporin
• Muscle relaxants (e.g., tubocurarine)
• Ulcer healing drugs (e.g., cimetidine)

Note: This information is for general knowledge and informational purposes only and does not substitute professional medical advice. Always consult your doctor or pharmacist for specific instructions and guidance regarding your medication.