had good results starting with the first pill, felt great!
in the states we have a different drug called sinemet and contains l-dopa and carbidopa. your drug has a similar drug to carbidopa and l-dopa.
the carbidopa compound is to limit the potential nausea. l-dopa is a simple amino acid which gets converted to dopamine in the brain so strange he would have such a negative reaction. one possible side affect is lowering blood pressure.

i have heard of possible allergies to the binder, coloring agents added to the drug. in the u.s., the lowest dose is 100mg and yellow, the next size up is 250mg and blue. but i have no idea how rare this might be.

you can give these drugs to perfectly healthy people at the doses you described and they might get a little nausea.