left with permanent muscle twitching?

Hi all. This is my first post and i thought i'd share my experience with the aneros helix.
I started using it towards the end of last year, with not much success. I'd estimate about 15-20 times. Regular orgasms were sometimes improved and other times below average. I'd heard it takes practice so persevered. I think it's probably important to note that in the session i'm about to describe, i was on two medications - Viagra (first time, 50mg) and Mirtazapine (15mg, anti-depressant). So, i was about 40 minutes into using the aneros helix and felt like something different was happening. My vision weakened and my right arm began convulsing involuntarily for a few seconds. My initial reaction was that i was reaching a super-o, despite the fact that it did not feel good. It passed, and a few minutes later returned. Again, it did not feel pleasurable. I gave up, and masturbated as usual. Afterwards, upon looking in the mirror, i noticed my eyes were incredibly bloodshot. I've no doubt thats down to the Viagra. During the following day, i was experiencing muscle twitches mainly in my fingers, but elsewhere too. It was very worrying! Sleeping was difficult....my body was twitching every now and again, and it wasn't like a normal sleep twitch, it's hard to explain. About a week later the twitching faded from my hands/fingers and seemed to shift to my calf muscles. If i look closely, i can see the 'fasciculations' or twtches randomly, all over both calf muscles. My eyes felt bruised for about a month. Some blood vessels in my eyes are permanently visible. It's nearly a year after this happened, and the twitching in my calf muscles has remained the same. I haven't used Viagra since, nor the aneros!
I'd love to hear peoples opinion on this.
Thanks 🙂