Round and Pin Worms, Tansy remedy for

"Tansy leaves may be crushed and put in whisky or dried and crushed with sugar. This is the best vermifuge I ever used." A tea made of tansy leaves must be used carefully as it is strong and never given to pregnant women.

Source: Mother's Remedies: Over One Thousand Tried and Tested Remidies from Mothers of the United States and Canada, T. J. Ritter