This article is one of Sandra Clair's most-read columns. It was first published in August 2016.
Your health: How to get rid of a cough that won't leave

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A lingering cough makes winter even worse. Photo / Getty

In a randomised controlled trial with four other herbs, Elderflower helped to reduce symptoms such as excessive mucus, headaches, and fever.
Thyme (Thymus vulgaris) is known for its antibacterial, antiviral and antifungal properties but it also helps with fighting the annoying left over symptoms that can result from a cold.
It can work to calm all types of coughs that may linger after being unwell. Thyme also works at helping to reduce and dry up excessive mucus which will help with reducing coughing and a post nasal drip.
Grindelia (Grindelia robusta) has an expectorant action that can help you get rid of excess mucus in the upper respiratory tract as well as calming the airways if you have a niggling cough. Grindelia is really helpful for asthmatics and those with chronic bronchitis for this reason.
Aniseed (Pimpinella anisum) oil also works really well by thinning excessive mucus so you can get rid of it more efficiently. This can help people who find they cough and cough but cannot clear the build up from the airways. Aniseed is also an antimicrobial and helps to calm your airways which is essential when you have been coughing a lot.
Even though you may be feeling a lot better than you were a few weeks ago, it is still a great idea to keep boosting your immunity. These specific plants will definitely help with your symptoms and help with fighting any extra bugs that are still lingering. Concentrate on nutrient dense foods high in antioxidants and keep up your fluid intake.
• If your symptoms do not clear or get worse please consult your leading medical provider.