Hi.

I would taik of proven Ayurveda wisdom as per time tested principles. 'Kapha' Dhatu (i.e. one of the three Humours viz Vata, Pitta, Kapha) is vitiated. In my clinical ayurveda career, Kapha has been balanced by herbals where antiallergenic and antibiotics have not worked. Is natural but little slow. It's harmless.

If your child was my patient, I would have recommended Chitrak Haritaki avaleha ( to be licked). It's little bitter being natural but best. Alternatively Amastha, Agastya Haritaki are more palatable. Intra cranial pressure is also released. Ayurveda relates it with Kapha too.

Once it starts acting, the intracranial waste mucous will start liquifying and come out. In few weeks the freshness felt by the child will sustain for much longer time. It creates immunity in body too. Main ingradient is chebulic myrobalan and other simple herbals. Total non synthetic.

Hope it helps. Medicines are commonly available in India but can be ordered online.