Can anything increase the valgus angle of legs? feel antipsychotics have weakened joints causing increased valgus angle and susceptibility to injury

Effect on walking: Antipsychotics can change how people step and walk (=gait). This kind of side effect can be reduced either by changing medication or adding a second medication - you should discuss with your psychiatrist. For background reading, here is a paper that describes assessment of gait in psychiatry: http://www.Ncbi.Nlm.Nih.Gov/pmc/articles/pmc2922365/.