What are the best treatments for Acute Respiratory Distress Syndrome?

For me personally it was ventilator support.

ventilator

Mechanical ventilation and ECMO. Continued monitoring of heart and lung function.

Physical therapy, counseling, emotional support from family, support groups.

Hospitals! ERS! and a very very good Doctor! if it's not diagnosed quickly you can die very quickly. This disease is brutal! and very fast acting. it chooses you. young or old it doesn't matter.

Oxígeno
Respirador artificial

I've been on almost every medication that is on the market they most all have steroids'..Your doctor may recommend medicine to relieve symptoms, treat the underlying cause, or prevent complications from being in a hospital. These may include:
Acid-reducing medicines to prevent stress ulcers, which can cause bleeding in the intestines.
Antibiotics to treat or prevent infections. If you are on a ventilator, your healthcare team may do tests, such as lung fluid lab tests or CT scans, to look for signs of new infection.
Blood thinners to stop blood clots from forming or growing larger. Heparin is a common blood thinner for adults.
Muscle relaxants to help prevent coughing or gagging while on a ventilator or to reduce the amount of oxygen your body needs.
Pain medicines, which your doctor may prescribe, depending on your needs.
Sedatives to help relieve anxiety, make it easier to breathe on a ventilator, or lower your body’s oxygen needs. Sometimes your doctor may pair a sedative with another medicine to make it easier to deliver the oxygen. Complications vary depending on the sedative used, the dose, and how long it is used. They can include depression, post-traumatic stress disorder (PTSD), problems with thinking or memory, or a delay in removing the ventilator.

Oxygen initially, getting stronger by walking as much as you can, work on breathing into a machine to strengthen your lung capacity.
Breathing treatments and positive attitude