Physiological Solutions:

* Normal saline (0.9% NaCl): This is the most common isotonic solution used in medical settings. It has the same osmotic pressure as blood and is used for hydration, fluid replacement, and to deliver medications intravenously.

* Lactated Ringer's solution: Similar to normal saline, this solution contains electrolytes like sodium, chloride, potassium, and calcium, making it more similar to the composition of blood plasma. It's often used for fluid resuscitation after trauma or surgery.

Other Isotonic Solutions:

* 5% Dextrose in water (D5W): While technically a hypertonic solution initially, the glucose is quickly metabolized by the body, making it effectively isotonic. It's used for hydration and providing calories.

* Balanced electrolyte solutions: These solutions are formulated to closely mimic the electrolyte composition of blood and are used for rehydration in cases of dehydration or electrolyte imbalance.

Important Note: It's important to remember that the isotonicity of a solution can be affected by factors like temperature and the specific type of cells it's interacting with. Always consult with a healthcare professional for specific medical applications of isotonic solutions.