Here are some commonly used homeopathic remedies for acidity (acid reflux / hyperacidity / heartburn): Nux Vomica – For acidity from spicy food, coffee, alcohol, stress, and irregular lifestyle. Sour/bitter belching, heartburn, and nausea, especially in the morning. Carbo Vegetabilis – For excessive bloating, gas, and burning in the stomach. Patient feels better from belching but weak and sluggish digestion. Robinia Pseudacacia – Intense acidity with sour belching, heartburn, and frontal headache. Natrum Phosphoricum – For sour belching, sour vomiting, and acidity after fatty foods. Often given in biochemic form. Pulsatilla – For acidity from rich, creamy, or fatty food. Taste of food remains in mouth for long; thirstless. Lycopodium – For bloating, fullness after small meals, sour belching, and acidity mostly in the evening.