Patients with viral colds can use antiviral medications along with anti-cold medications. These antiviral medications can be given orally or as intravenous infusions. So the usefulness of injections for patients with viral colds depends on the specific medication given. If a non-antiviral drug is given, the shot is useless. If antiviral drugs, including acyclovir or ribavirin, are given, the injection will be useful. Typically, patients with viral colds can take oral oseltamivir phosphate pellets to help fight the virus. In addition, take anti-cold medications to improve symptoms. Severe symptoms can be treated with the ingredients of these anti-cold medications by infusion and injection.