Hi! I do not think that this explanation is the correct mechanism of antibiotics aggravating the PD symptoms. Because, I do not take L-dopa. Also, I do not know if the benign bacteria have any effect on the absorptiion of L-dopa. I suspect that some of the antibiotics are worse than the others. In general, they may have direct effect on the neuronal functions too. However, I do not have any valid explanation for this effect I see. Raj ********* ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn