**
Prior to opting for any alternate system of medicine one must take into account the following considerations:
1. Since humidity and hot weather is prime cause of oily skin, one have to rule out seasonal changes.
2. since there is recurrence of condition thus one has to check with general physician regarding examination and hormone levels.
PS. irregular intestinal movements or digestive tract problem (constipation) ?? [Acne is believed to have a very close relation to the stomach]

PS. As you judged correctly 'hair thinning' is one of the adverse effect of using Acutane [isotretinoin]
4. In the mean time just wash your face with Besan and Luke warm water (best natural bleaching agent),removing excess sebum and dead skin cells, likewise Neem,acts as a deep cleanser
5.
i. Use of fresh vegetables and fruits, stay hydrated (drink 10-15 glasses of water/ day)
ii. Avoid: Sugar (in any form), caffeine,cheese, oily-spicy-dry-fried food, chocolates,cakes,iodized salt,soft drinks.
iii. Avoid exposure of the skin to severe climatic conditions.

6. because Skin & Nervous system has a common Embryological origin (thus acting as an initiating or aggravating factor), thus treatment will be directed as "Psychosomatic Treatment"
7. Natural medicine [prescription drugs] available are: Maha Thiktakam kashayam, Patoladi kashayam, Maha Thiktaka Gritam, Guggulu Thiktaka kashayam / Gritam, Saptasaram kashayam, Khadira Arishtam, Kumari Asavam Sarivadi Asavam / Arishtam, Avipattikar Churna, Haridra Khanda, Chandanadi Lepa, Multani Mitti.
8. Do have a consultation with your attending Doctor [preferably Dermatologist] for baseline investigations and necessary conclusion.