CHEMICAL DEPENDENCY

Your mutation has caused a physical dependency to a drug or chemical which you must ingest to function normally.  When you are deprived of the drug or chemical to which you are dependent you must make a Fortitude save (DC 15 + number of days without drug or chemical), or lose 1 Constitution each day. Healing the Constitution damage requires ingesting the drug or chemical of your dependence.  Once the drug or chemical is consumed, your Constitution damage heals at a rate of 1 Con per minute.

The value of this drawback depends on the cost and availability of the chemical in question. A dependence on a commonly-available chemical, such as nicotine, caffeine, or alcohol, has a value of 1. A month’s worth of doses has a Purchase DC 10.

Less-common chemicals, such as over-the-counter prescription drugs, have a tier of 2. A month’s worth of doses cost Purchase DC 14.

A dependence on rare, expensive, or illegal substances, such as narcotics or specially-formulated chemical treatments, has a tier of 4. A month’s worth of doses has a cost of Purchase DC 19.

Depending on what chemical dependency your character has there may be additional side-effects based on the type of chemical or drug.  The GM must approve any chemical dependency.