
This is one of the many herbal remedies for the treatment of coughs & colds I have found:
Take a heaped teaspoon of wild thyme and some sliced lemon and add it to linseed tea. Taking a tablespoon every three hours will ease and cure a cough. (North Somerset, 1925).
Flax seed, used to make linseed oil, is rich in Omega-3 alpha-linoleum acid, which can help prevent heart disease, diabetes, inflammation and immune system problems. Used for diseases of the respiratory system such as pleurisies, pneumonia, coughs, asthma and consumption. It was believed during the Middle Ages that flax flowers protected against sorcery.
Lemon - Citrus Limon

Thyme - Thymus Vulgaris:

Thyme can fight infection and suppress coughs; it acts as an expectorant, purging the body of phlegm.
The properties of thyme as an antiseptic were known as far back in history as c.3000 bce, used by the Sumerians. Also used as part of the mummification process by the Ancient Egyptians and by the Greeks and Romans as a massage oil.
As an essential oil it has many properties, it is antibacterial, antispasmodic, anti-rheumatic, expectorant, hypertensive and has calming properties.
Folklore
Any place where thyme grows wild is said to be blessed by fairies

In the late 1890s, Bayer the German drug company commercialised both aspirin and heroin as cough, cold and pain remedies. Bayer promoted heroin for use in children suffering from coughs, colds and "irritation" as late as 1912. You have to admire their business acumen, getting patients addicted, a good sales technique.
Whilst there are therapeutic properties to the ingredients contained in the recipes above, this cannot be said for most of the believed cures for whooping Cough.
Don't fry this at home!

Placing the cinders in water creates sulphur water, which was a popular tonic in the days before antibiotics became available. Sulphur contains powerful anti-infective agents, but too much can be dangerous.
Another use for the mouse. Skin a field mouse and make a small pie for your child to eat. Waste not want not, for those eco warriors such as Rainbow Meadows (See Heinous Hymen and the perilous placenta) you can recycle said mouse skin by strapping it to the throat of your precious spawn, furry side down, for nine days!

Or take a bowl of milk, encourage a ferret to drink from the bowl, then pour the rest down the throat of the cougher. That should shut them up or choke them to death, either way they will cease coughing, though it may be exacerbated temporarily until the desired effect has been achieved.

To cure a cough, first get some parchment made from the skin of a hyena. Write the spell on the parchment in black ink, then draw an X in a circle, lastly write the name of patient who has the cough.
Analysis of the magical traditions in question, although not explicit, suggested that the treatment would be concluded by the parchment being placed over the patient's chest for a prolonged period of time or it would be soaked in spring water until all the ink washed out into the water, and the water would then be fed to the patient as medicine.
Acts of horsesarsery will not be tolerated here but for the numpties out there, essential oils should only be used if you are trained in their use, some can be dangerous, even fatal if they are used incorrectly or if you suffer from certain conditions. Nor do we encourage the skinning of mice or hyenas or force feeding ferrets. (Well, that is not strictly true, but we have to say it).