Many people using Goody’s Headache Powder do not experience serious side effects; however, possible side effects include nausea, upset stomach, trouble sleeping and nervousness, reports WebMD. This medication is as a pain reliever and fever reducer. It contains acetaminophen, aspirin and caffeine, says Drugs.com.
Goody’s Headache Powder should not be taken with mifepristone or ketorolac. Consumers who are allergic to NSAIDs or caffeine or who have aspirin-sensitive asthma should not take this medication, says WebMD.
Drugs.com warns that using other medications containing acetaminophen while taking Goody’s Headache Powder can lead to an overdose. If any severe side effects occur while taking this medication, it is recommended to seek medical attention immediately.