Being tired while taking a high dose of MMS like 10 to 15 drops might be due to low iodine in the body. Thyroid glands are responsible for detoxing waste, but it need good amount of iodine to do the job properly. It is like a car that needs fuel to move around.

It is important to maintain healthy level of B-Complex, Vitamin C, Vitamin A/D and iodine in the body. Best way to get iodine is Kelp.

Your body do drain vast amount of vitamins/minerals when doing a lot of detox, killing off parasites etc.

This is what I take:

25,000 iu (10,000 iu Vitamin A and 15,000 iu beta carotene)
1000 iu Vitamin D-3
1000mg to 2000mg Vitamin C
100mg B-Complex
Kelp

... and a lot of water.

Never felt tired when taking 15 drops or more.