Abilify/aripiprazole is well known for causing agitation and akathisia. 0.5mg is also a tiny dose, so increasing it may help, though I imagine a big increase would be needed not just another 0.5mg. For me the agitation/akathisia occurred at 6-8mg. Under 5mg was stimulating, then 10mg was sedating and the agitation etc just stopped like magic within 3 days of taking 10mg.