In short everyone!
Reiki is for anyone who wants to receive reiki energy. Children, adults, mothers to be, animals, plants and the list goes on.
Anyone going through happy or challenging times, illnesses ongoing pain or just want a boost can benefit from reiki.
Reiki does not interfere with medication but acts as a complimentary treatment. There are some exceptions due to the nature of how reiki moves through the body for who should not have reiki or be cautious when doing so. For example, those with a pacemaker should seek medical advise before having a session.
If in doubt, just ask!