Took 20mg risperidon, what could be the sode effects?

[nonliv]

Should I call the emergency number? My head hurts but that might be from crying.

 

[DivineSpark]

I think long term use of risperidon can cause massive weight gain.

 

[Spicy Tteokbokki]

Risperidone overdose causes extrapyramidal effects but not cardiac toxicity - PubMed

Risperidone taken alone in overdose causes minimal effects. Tachycardia and dystonic reactions were the main features of toxicity. Significant cardiac and other neurological features seem to be uncommon.

pubmed.ncbi.nlm.nih.gov

Effects of risperidone in overdose

This study was a 13-month prospective, descriptive case series of risperidone overdose reported by telephone to a regional poison control center (PCC)…

www.sciencedirect.com

A case of risperidone overdose in early schizophrenia: a review of potential complications - PMC

Deliberate drug overdose is a frequent occurrence in patients with schizophrenia. Typical antipsychotic medications can be lethal at doses 5 times the recommended therapeutic range. Clozapine, an atypical antipsychotic, can be toxic at doses 4 times ...

pmc.ncbi.nlm.nih.gov

Did a quick search and only read the abstracts, but overall seems it might be uncomfortable but not the end of the world, hopefully.

Not a doctor, though, and if you're worried it's always better to call for emergency than not.