Is This Dosage Of Depo-mendrol Injection Safe To Treat Headache?

Sir,I am neeraj gaba 45 yrs suffering from headache since long time consulted physician & neurologist finally neurologist suggested headache is due to chemical problem in brain & prescribed 7 injection of depo-mendrol 80 mg.after the course of 7 injection I got 50%releif from headache now please suggest me can go for another course of 7 injection & what are possible side effects after 14 injection.Regards,neeraj Gaba,Ph-0000