Sidmak Laboratories [India] Pvt Ltd manufactures Theophylline in Tablet Form. Sidmak Laboratories [India] Pvt Ltd also offers various types of pharmaceuticals as well as neutraceuticals products.ŸThe manufacturing plant of the company is approved by W.H.O. As per GMP guidelines and by local FDA as per drug and cosmetic act. The Theophylline in Tablet Form has strength of 200 mg. This Medicine Composition is available in sustained release from.