Tess,

As near as I can figure, the dosage for the calcium citrate tablets with vitamin D, magnesium, and zinc works out to one table for every 50 lbs of weight.  I start at three tablets with lunch and up the dosage to four tablets later that night or the next day if there's no change in my cluster headache frequency or my response to oxygen therapy is still slow. 

Lemonade is a good chaser.  As an alkaline forming food stuff like lots of green veggies, lemonade appears to boost my pH and end the high cycle within a day...

Starlight, 

25 liters/minute is minimum effective oxygen flow rate for most folks to achieve a rapid cluster headache abort (7 minutes or less).  Higher flow rates work even faster.   If I catch an oncoming attack early, my abort times are less than two minutes and sometimes less than one...

We get all the oxygen needed when breathing 100% oxygen at flow rates of 7 to 9 liters/minute. Unfortunately, what these flow rates cannot do, when administered with a constant flow oxygen regulator and non-rebreathing mask, is cast off enough CO2 to keep it at a normal level. 

As an elevated arterial CO2 level almost completely negates the beneficial vasoconstrictive properties of oxygen therapy, we need a level of lung ventilation (flow rate) that keeps CO2 levels normal, and if we want a faster abort, we need a high enough oxygen flow rate to bring arterial CO2 levels below normal, i.e., hyperventilation.

An oxygen flow rate of 25 liters/minute or higher may sound like a high flow rate, but there are a number of studies done on respiration rates of first responders like firemen and CBR experts wearing full face masks and breathing compressed air that show just walking around (or doing a slow cluster two-step shuffle) demands a minute volume (the volume of air inhaled in one minute) of 25 minute-liters just to maintain normal arterial CO2 levels... 

When these same first responders climbed two or more flights of stairs at a rapid pace, the minute volume jumped to 57 liters...  Again, that level of lung ventilation was what their bodies demanded just to maintain normal CO2 levels...

If you're a jogger, you chop wood, or do any strenuous work for more than a minute, your minute volume of lung ventilation is likely up around 60 minute-liters or more during these activities...

To put this in perspective, the minute volumes of lung ventilation in the examples above are "Normal" for these levels of physical activity.  That means in order to hyperventilate, (ventilating the lungs at a higher rate than normal) you need a higher minute volume than normal.

Get the picture yet?  If you've doing the cluster two-step or seated and rocking back a forth while attempting oxygen therapy, you'll need a minute volume of lung ventilation of 25 minute-liters (an oxygen flow rate of 25 liters/minute) just to maintain normal CO2 levels...  And if you want a faster abort, you'll need to hyperventilate with a higher minute volume of lung ventilation...  an oxygen flow rate greater than 25 liters/minute.

For the "Nervous Nellies," this method of oxygen therapy results in lower total oxygen exposure times than the hyperbaric oxygen therapy (HBOT) currently approved for diving sickness and other medical purposes...

Take care,

V/R, Batch