Its really best to try natural alternatives and only use medication as a last resort - even though some antihistamines are thought of as 'safe' they still interfere with natural body processes and can have side effects. I've found Quercetin really good against hayfever, it is a naturally occuring flavanoid found in some fruits and vegatables and can be taken in capsule form, available from health stores. There are also some great homeopathic remedies for hayfever. :-)