They may include mood swings, anxiety, irritability, changing levels of energy and trouble sleeping.
[addictioncenter.com]
Symptoms include depression, anxiety, nervousness, mood swings, nightmares, irritability, fatigue, headache, enlarged pupils, pallor, sweating and rapid heart rate.
[symptoma.com]
You might end up with a few more emotional effects too, like mood swings, depression or confusion. Basically feeling like the lowest form of life on the planet.
[brighteyecounselling.co.uk]