 [ Symptoms ] can a small bowel series with barium swallow cause constipation  i have been losing weight and am now approx 20lbs under the lowest gauge for my height 5 4 i have had an endoscopy colonoscopy and a small bowel series with barium swallow ever since the small bowel series i have had constipationvery little movement of the bowels can barium cause a gastric blockage [ Disease ] hair loss is not the symptom of hiv although hair loss certainly may occur as a side effect of the anti retroviral medications other conditions can contribute to hair loss and we advise discussing with your hiv specialist and to get a dermatology consult for better guidance