Can a carisoprodol overdose be fatal or just bad?

Either: Muscle relaxer that also works centrally in the brain. The drug is related to other sedative type drugs (meprobamate). Can cause respiratory depression, low blood pressure, seizures, blood problems, dependency/abuse, withdrawal; worse if mixed with other depressants like alcohol. There are other and better alternative drugs; a popular item on internet sites- not a good way to get medicines.