Homoeopathic medicines may help to boost your immune system but are not recommended as the sole treatment for asthma. If you do want to try homoeopathic medicines, use them in conjunction with those prescribed by your doctor.
Antihistamines can be used to alleviate allergic reactions such as hay fever but aren’t effective in asthma treatment.
Antibiotics are seldom necessary as viral infections are by far the most common triggers of asthma.
Cough mixtures won’t offer you any relief as the cough is most often a sign of poor asthma control and a signal that reliever medication is needed.
Tranquilisers are dangerous as they may suppress breathing - especially in severe asthma attacks.
Desensitisation is not recommended in asthma, as it’s not effective. Ionisers are ineffective.- (Health24.com)