IsoniazidSide Effects - XML FEED - Medications.com http://www.medications.com/se/Isoniazid Recent side effects for Isoniazid inflamation of lower spinal cord, and lower adominal pain. Fri, 16 Dec 2005 05:50:15 -0500 http://www.medications.com/effect/view/12025 inflamation of lower spinal cord, and lower adominal pain. http://www.medications.com/effect/view/12025 My son became aggressive, hostile and generally anti-social. Thu, 06 Jan 2005 03:46:11 -0500 http://www.medications.com/effect/view/7171 My son became aggressive, hostile and generally anti-social. http://www.medications.com/effect/view/7171 I feel drowsy after taking Isoniazid. I am taking medication in e Fri, 20 Dec 2002 15:08:06 -0500 http://www.medications.com/effect/view/1332 I feel drowsy after taking Isoniazid. I am taking medication in evening http://www.medications.com/effect/view/1332