This is a concern. Please be advised that When on Ritonavir, taking Ecstasy can cause an increase in the potency of the MDMA and therefore can cause an overdose. Taking breaks from dancing can allow heart rates to return to normal, core temperature to lower, and to slow the breakdown of muscle cells and the formation of blood clots in organs. Due to the dehydration that results from both dancing and MDMA, it is also important to rehydrate by drinking lots of fluids, especially water. However, it is vital that too much water isn't drunk.
Sport drinks are good as well, so long as the body's sugar levels are considered.
In addition to these, there are organizations such as Edmonton's RaveSafe, which provide onsite testing kits, information, and advocacy. Suggested regulation for raves and after hour clubs, from experts studying raves and MDMA are to have mandatory 15 minute breaks in the music every few hours, cool down rooms, strict structure around space capacity, free water, and paramedics or other health professionals onsite. Most of the raves being held, as well as most of the after hour clubs, practice these guidelines. However, if both raves and after hour clubs are cracked down on too hard, there is a risk that they will go underground and then no policies or guidelines will need to be followed. From an HIV perspective, it is important to have condoms available either at the venues or by youth carrying them.