The instructions for sildenafil do not contain contraindications for the treatment of colds, so you can take cold medicines orally. Sildenafil can treat erectile dysfunction and is not suitable for women or children. Common adverse reactions include headache, dizziness, rash, abnormal vision, nausea, and also prolonged erectile function and abnormal erections. It is forbidden to use it with nitrate and leucovorin. Colds are divided into common cold and influenza, common symptoms include runny nose, nasal congestion, headache, fever, limb weakness and soreness, etc. Severe symptoms can be relieved by oral aminoglutethimide capsules. Common colds usually do not require the use of antiviral drugs, more rest and proper exercise can be recovered. For influenza patients, oseltamivir can be taken as an antiviral treatment. The above medications should be taken according to the doctor’s instructions. If you feel unwell, consult a doctor immediately.