From EarthClinic.com

Iodine stops Salmonella poisoning almost immediately. Use 1/2 glass of water with 6 drops of Lugol's iodine solution. Stir and drink. You will feel better in 1 hr. Take this 4x/day after meals and at bedtime for 3 days, or as needed. 

For Acid Reflux: You need iodine to produce stomach acid. So take Lugol's solution (2%), 2 drops/day first thing in the morning on an empty stomach.

RDA for iodine is 150 microgram per day. But you can use it safely up to 12.5 mg/day of elemental iodine to decrease thyroid, prostate, and breast cancer. Four types of iodines: Nascent iodine (atomic form), Lugol's solution, potassium iodine, and nano-colloidal detoxified iodine. 

Iodine dosage (Dr. Sircus) - iodine has antibiotic properties. For children, can take minimum of 30 drops of Nascent iodine per day (total). The same amount if use Lugol's solution.

If have cancer, depends on many variables, one could take 25, 50, 100 mg or higher amount.

If have fever, take 10-15 drops every 2 hours.

Reference & Source:

Earthclinic.com
Mark Sircus