HCPCS Code J0640: Injection, Leucovorin Calcium, Per 50 mg

It depends on the method. If it's intramuscular or subcutaneous, it shouldn't take longer than 10 or 15 minutes. But if it's intravenous, it'll definitely take longer.

They very likely have to fast several hours before the injection, or at least avoid certain food.

There will be pain and discomfort in the injection site. It's also possible for the patient to feel nauseous after the injection. The adverse complications to look out for are allergic reactions, injection site infection, and imbalance of electrolytes or folic acid.