Is anyone taking this ziconotide ? What side effects do you have? ## Hello, Lucille! How are you? What side effects are you experiencing? The FDA lists its typical side effects as possibly including dizziness, nausea, confusion, headache, weakness, abnormal vision, depression, fever, rigors, sinusitis and muscle spasms. ## I tried it about 5 yes ago, had intolerable side effects had to go back to Dilaudid. Now after 7 yrs delaudid not working well don't know what else to try. Maybe up the bupivacaine mix percentage?