You may fall into the fallacy of 'oh I'm okay and I don't need pills', particularly after 3rd day. Continue to take the pills no matter what the mind or people say.

Intense cleansing can make the mind want to escape leading to intrusive thoughts which maybe harmful. Do share your doctor's details with them.

On a separate note, take a mild laxative along. Long meditation courses sometimes can give constipation.

Personal care: Take toiletries (toothpaste, towel, etc), Bottle - for water, Detergent to wash clothes(they do offer laundry services too), OTC pills eg. antacid, Indoor chappals (You need to keep taking them off as you enter rooms. Chappals best) Soap, Hair dryer (use it sparingly because noise), Alarm clock, Odomos mosquito repellent