There are a number of remedies that can be used for cold and flu according to symptoms. Here are a few that can be considered:
Aconite -> Sudden onset after exposure to draughts or cold winds.
Gelsemium -> When symptoms are influenza like.
Nat Mur -> When nose runs like a tap.
Camphor -> Limbs feel ice cold and feeling of flu.
Influinzium, Baccilinium, Nat Mur -> If symptoms persist.