Based on the information provided, I was unable to find specific symptoms of a Yervoy (ipilimumab) overdose. However, it is important to note that Yervoy is a prescription medication used to treat melanoma and is not intended for recreational use or misuse.

According to the drug label from the Food and Drug Administration (FDA), the recommended dose of Yervoy is 3 mg/kg administered intravenously over 90 minutes every 3 weeks for a total of 4 doses [1]. The label does not provide information on the symptoms of an overdose.

In general, an overdose occurs when a person takes more than the recommended or prescribed amount of a medication. Symptoms of a drug overdose can vary depending on the medication and the individual. Common symptoms of a drug overdose may include nausea, vomiting, abdominal pain, dizziness, seizures, difficulty breathing, and loss of consciousness [2].

If you or someone else has taken more Yervoy than prescribed, it is important to seek medical attention immediately. The National Poison Control Center can also be contacted at 1-800-222-1222 for advice [3].

In conclusion, while there is no specific information available on the symptoms of a Yervoy overdose, it is important to follow the recommended dosage and seek medical attention if an overdose is suspected.

Sources:

1. Yervoy (ipilimumab) injection, for intravenous use [Drug Label]. FDA. <https://www.accessdata.fda.gov/drugsatfda_docs/label/2011/125297s000lbl.pdf>.
2. Drug overdose. Mayo Clinic. <https://www.mayoclinic.org/diseases-conditions/drug-overdose/symptoms-causes/syc-20378463>.
3. Poison Help. American Association of Poison Control Centers. <https://www.aapcc.org/about/poison-help/>.