Mild foods the day of and after the castor oil purge. Rest, too. Do not run the pets or walk or hike with them. Do not repeat the castor/ ginger purge. ginger is not necessary if pet wont take it.
The regimen should be taken max 60 days. Give a month break before beginning again if heartworm season is much of a concern. 90 days with frequent breaks after first month.
Turmeric may cause anemia with prolonged use. If sufficient protein is in diet, should not be an issue.
Take this with salt: Some independent research shows Heartworm appears in <2.9% of untreated canines. Potentially; synthetic wormer is upsold to give veterinarians incentive for more cashflow, and to treat patients side effects of synthetic wormer and cash another visit.