I have many digestive problems and everytime I tried taking acidophilus (several different brands/bacteria) all symptoms would worsen. Today, I came across this info I thought I'd share: "Dr Leo Galland does not recommend taking probiotics while under treatment for parasitic infestations because bacteria are "food" for protozoal parasites. Save your probiotics to take after the course of anti-parasitic treatment is completed."
Some more info from the same website: "A few supplements you may be taking can be counterproductive to the treatment of dysbiosis and are mentioned here so you can avoid them. Iron supplements feed unfriendly bacteria and protozoan parasites. Fructooligosaccharides (FOS) also feed some unfriendly bacteria. As mentioned above, protozoal parasites "eat" bacteria, so your doctor may advise you to avoid probiotics during the course of anti-parasitic treatment. If you are taking botanical remedies for dysbiosis, your doctor may tell you to temporarily avoid all antioxidants because botanical medicines kill parasites and bacteria by oxidizing them, and thus, antioxidants reduce the effectiveness of these remedies."