A metallic taste can be due to many causes, but the medications you listed are not associated with causing a metallic taste. You should see your physician to diagnose the reason you're experiencing this.
Common reasons are:
respiratory infections (colds, sinus infections, throat infection, or pharyngitis)
dry mouth (due to salivary gland disorders or infections)
vitamin deficiencies (such as B-12 and zinc)
liver or kidney failure
brain tumors or other tumors that destroy or injure areas of the nose, mouth, throat, or brain responsible for taste