For a severe cold, runny nose, and cough, over-the-counter medications can provide effective relief. An antihistamine (like cetirizine or diphenhydramine) will help dry up a runny nose and reduce sneezing. A nasal decongestant (like pseudoephedrine) can ease stuffiness. For a dry cough, look for a cough suppressant containing dextromethorphan; for a wet cough, an expectorant like guaifenesin helps clear mucus. You can take paracetamol or ibuprofen for any body aches. Please stay well-hydrated, rest, and consult a pharmacist or doctor to ensure these options are safe for you, especially if you have other health conditions like high blood pressure.