Which madopar are you taking is it the dispersible?
Madopar is available as a regular tablet and as a dispersible. The dispersible enters your system very quickly and is mostly used as kick start in a morning, some though prescribe it as a dose to be taken whenever you feel you are worn off. It is also prescribed as a standard treatment ie 3 times a day etc.
There is no consistency in the prescribing from one neuro to the next and because it enters your system very quickly it can cause dopamine "spikes" which can cause side effects such as dyskenesia and dystonia. Maybe the feeling of euphoria is caused by this (assuming it is dispersible)
A friend of mine was given madopar dispersible to take as and when by the pd nurse only to be told by her neuro it was to be strictly used for morning kick starts only and then only when needed.
Also is your madopar manufactured by Roche if not it will be generic which can cause problems too.
Personally i have always used sinemet and once I had established the timings of doses and the best eating regime its been good (not perfect, no drug is because of the many variables)
i deal with wearing off by using the following rules of thumb if I have taken a tablet and it isnt working:
Generally drink plenty water with your tablets; take levodopa with fizzy pop (still drink water too).
Empty stomach; eat something sweet ie fruit or a mars bar
Full stomach: strong coffee with sugar (dont need a big cup)
If the pill hasnt worked 2 hours after taking: take another.
Be aware of stress, constipation and underlying illness as all can affect pill absorbtion.
Dont just pop pills as and when if you are having problems without some understanding of whats causing
If you take Azilect at 1.0mg the manufacturer recommends reducing to 0.5mg if levodopa is introduced.
Discuss with your medical team, check if generic and consider selegeline as an alternative.
ALL ABOVE IS MY OPINION AND YOU SHOULD CHECK OUT WITH A MEDICAL PROFESSIONAL