Prolongedly vs. Prolonged: What's the Difference?

Prolongedly and Prolonged Definitions
Prolongedly
In a prolonged manner; at length.
Prolonged
To lengthen in duration; protract
Factors that prolong the drug's effect.
Prolonged
Lengthy in duration; extended; protracted.
Prolonged
Simple past tense and past participle of prolong
Prolonged
Relatively long in duration; tediously protracted;
A drawn-out argument
An extended discussion
A lengthy visit from her mother-in-law
A prolonged and bitter struggle
Protracted negotiations
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Prolonged
Drawn out or made longer spatially;
Picasso's elongated Don Quixote
Lengthened skirts are fashionable this year
The extended airport runways can accommodate larger planes
A prolonged black line across the page
Prolonged
(of illness) developing slowly or of long duration