Please choose the correct ending to complete the given sentence: Health: [header] How to relieve constipation with castor oil [title] Tell your doctor or pharmacist about all the drugs you are taking. [step] It is possible for castor oil to interact with certain drugs, and you should be sure that you won't experience any harmful drug interactions before taking it. [substeps] Tell your pharmacist about any allergies you may have.

Ending1: Castor oil may interact with a variety of medications and it is important to keep this in mind. It is important to speak to your doctor or pharmacist before using castor oil. Ending2: Go over this with them to make sure you're not taking more than the recommended dose. [title] Make sure to speak to your doctor before using castor oil as an over the counter treatment. Ending3: Castor oil contains certain ingredients that may affect you if you are allergic to them. [title] Do not use castor oil if you are pregnant. Ending4: This is important because castor oil is known to interact poorly with certain medications. Explain that you may have lameness, nausea, or abdominal pain in your kidneys and possibly even diarrhea.

Answer format: ending1/ending2/ending3/ending4