Strong smelling urine after taking probiotics for the first time. is this normal? what could cause this?

Smell in urine: Any changes to your supplements can cause a change of smell and color to your urine. As long as you are not having pain, blood, or cloudy urine you should be fine. Have a u/a done if you are having any symptoms

Yes: They can cause a change in the odor of your urine as can antibiotics. As long is that is your only symptoms, not to worry. If any pain with urination, frequency of urination then should see your doctor for evaluation. Hope this was helpful. Dr R