Hi there.
I've just restarted using 5-htp to improve sleep. The last couple of days I took 2 holland and barret capsules containing in total: 5htp 100mg Niacin 10mg Vit B6 10 mg Magnesium 50 mg. The first day I felt no significant effect, but maybe slightly improved mood the next day. Yesterday, I had a glass of wine earlier in the evening, then missed dinner and had the 5htp with a small carbohydrate snack. I was unable to sleep and had a 'wired' feeling that is still present today.
I feel euphoric, but it has a slightly 'crazed' edge to it that's not entirely pleasant.
Obviously if that happens every night it's no good as a sleep aid. But I feel it would be good to persist with a lower dose for the mood lift, and change the time I take it if it prevents sleep. Do you think missing dinner and combining it with alcohol could cause this effect? Are there any potential harmful effects or downsides to long term 5htp use?