antivirals? What are they then?
Antivirals are medicines which work against viruses. Plentiful and cheap, but not often prescribed for chest problems.
Five years ago mrsmidlife had a huge outbreak of mouth ulcers, big swelling, puss, horrid time. Got to the stage of not being able to eat, and big amounts of pain. Doc got her on big doses of acyclovir tablets (same stuff as in Zovirax cold sore cream) and eventually it was sorted, but she keeps a repeat prescription and at the first sign of a cold sore starts a course.
Last year she has this long winter cough, similar to you describe. Won’t shift, goes to doc. Doc says prob nowt we can do, checks for other nasties, all negative. Tries antibiotics, still no improvement. Week after antibiotics finished, cold sore appears, in go the acyclovir. Cough significantly better by day three and gone completely in less than a week. Doc agrees that’s what shifted it.
Most acyclovir gets used for viruses of the herpes family, chickenpox and shingles etc, and developing resistance to the stuff is not seen a problem like with antibiotics. All I can say is, it worked for her.