Chikungunia and high BP. It be treated?

I have had Chikungunia for two months and besides muscle and joint pain, I have also had high BP all along. My meticulously kept records show that BP medication has had practically no effect on the BP figures. Last week on a chance discovery I observed that after two rather stiff pegs of social drinking over 3 hours, my BP measured at 80/120! Even after 10 minutes it was the same but returned to my average high of 95/145 within 24 hours. I tried the same 'treatment' on the next alternate night with the same positive results. Is it the 'neurological complication' of the disease that this site mentions? How can it be treated? It doesn't seem to be fading with time either. If it helps I can also vouch that along with high fever at the start, I experienced mild body sprain and stiffness of neck muscles, actually heard low rumble and saw wavy visual patterns, besides very mild visual disorientation. But those things are now cleared. Hazy focus of the eyes however has remained.