1. Diarrhea: Not a common side effect of Cilnidipine, but gastrointestinal symptoms can occur. Consult a healthcare provider if diarrhea develops.

2. High Heart Rate: Cilnidipine may cause a reflex increase in heart rate, though significant tachycardia is uncommon.

3. High Blood Pressure: Cilnidipine is designed to lower blood pressure. Persistent high blood pressure should be evaluated by a doctor.

4. Elevated Blood Sugar: Not typically associated with Cilnidipine. Monitor blood sugar levels as they can be influenced by various factors.

Recommendation: If these symptoms occur or worsen, consult your doctor to assess and adjust treatment. Do not change medication without medical advice.