Giardiasis does not spread via the bloodstream, nor does it spread to other parts of the gastrointestinal tract, but remains confined to the lumen of the small intestine. Giardia trophozoites absorb their nutrients from the lumen of the small intestine, and are anaerobes.iardiasis does not spread via the bloodstream, nor does it spread to other parts of the gastrointestinal tract, but remains confined to the lumen of the small intestine. Giardia trophozoites absorb their nutrients from the lumen of the small intestine, and are anaerobes.
Glycerin suppositories side effects. The most common side effects of glycerin suppositories are anal irritation, a burning sensation, diarrhea, gas, nausea and abdominal cramps.
Many nonprescription and prescription medicines and supplements can cause gas and bloating. 1  Aspirin. 2  Antacids. 3  Diarrhea medicines, such as Imodium, Kaopectate, and Lomotil. 4  Narcotic pain medicines. 5  Fiber supplements and bulking agents, such as Citrucel, Fiberall, and Metamucil.  Multivitamins and iron pills.