Chem Addiction is a game mechanic in
Fallout 4 that is designed to simulate the downside of taking performance-enhancing
Chems. This mechanic provides players a reason to carefully think over their consumption of
Chems as their can be some obvious consequences on their characters.
Consequences
These consequences include loss of hair, headaches and blurred vision every 2 minutes. Failure to take the Chem again after its effects wear off, leads to Withdrawal Symptoms. These symptoms can result in lowering of stats, making you weaker.
The withdrawal symptoms of your particular Addiction are viewable on the
Pip-Boy on STAT > STATUS page and then pressing the SHOW EFFECTS button.
Cure & Prevention
There are different ways to prevent
Chem Addiction and even cure it in
Fallout 4.
Prevention

Increase your capacity by using the
Chem Resistance
Perk.

Consume only 1
Chem per 33 hours in-game (not confirmed).
Cure
Doctor Sun in
Diamond City or
Covenant who will cure all addictions for 100 Caps.

Take
Addictol

Craft a
Refreshing Beverage at a
Chemistry Station.