Therapies are only for individual symptoms. There is no single solution to PCS. 85% recover spontaneously. The rest of us run the gamut of time and recovery levels.

Quiet rest, just enough exercise to get good blood flow through the brain, avoiding the toxic foods and chemicals (alcohol, caffeine, etc) are the tried and true ways to recover. It is important to not cause relapses due to over-load by work, sensory stimulation, etc. It is not enough to just get good rest. You need to avoid the highs of stress overload. It is the peaks you need to avoid.