Celeste is quite nice. Doesn’t especially remind me of the pill.
Shannon is low rent 90s so I wouldn’t.
Fallon - no, made up/downmarket
Juliette - lovely, though prefer Juliet
Eden - overused, down market
Arden - not a name
Dixie - could be a nice nickname though but low rent as a full name
Seren - lovely but getting super popular
Noelle - OK
Other thoughts
Meredith, Lois, Arran, Ffion, Marianne, Laurel, Elowen, Cleo, Ines, Juno, Caitlin, Linnet, Roslyn, Rosen, Stella/Estella, Merryn, Cerys, Aster, Emerald, Elen, Frances, Circe, Olwen, Sylvie/Sylvia, Aislinn/Aisling (Ash-lin/Ash-ling), Astrid, Cassia, Adela, Serena
Also Erin, Robin, Rowan, Iris, Margot but they are all super popular
Astra - another star name, though people might find it funny right now...