Hangover 
To dream of having a hangover indicates self-delusion in your waking life. Too much may be happening at once leaving you feeling overwhelmed. It suggests that you may be overdoing something, possibly working too hard to avoid facing the realities in your home or emotional life. A hangover in a dream suggests that some time away from your current work commitments may be beneficial at this time.
Injection
To dream that you are being injected for health reasons symbolizes the necessity of recovery. Your need for healing may encompass any aspect of your persona, mind, body, heart, and spirit.
To dream that someone is forcibly injecting you indicates your resistance and negative mindset about a particular situation or person. It also symbolizes the effect of peer pressure on you. You are aware that someone is pressing their negative and unsolicited advice and viewpoints on you.
Ammunition
To dream of ammunition could indicate that you are using influence and authority to convince others or keep safe. It can also mean that you are attempting to achieve your goals through devastating means.
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