Being under the influence of a controlled substance in California can result in criminal charges under California Health and Safety Code § 11550. A standard violation is a misdemeanor punishable by up to one year in county jail, although certain repeat offenses and firearm-related violations carry more serious consequences.
Understanding what qualifies as being under the influence, how prosecutors establish the offense, and what defenses may apply can help individuals understand their legal rights and options when facing an HS 11550 charge.
What Is California Health and Safety Code § 11550?
California Health and Safety Code § 11550 makes it unlawful to willfully and unlawfully use or be under the influence of certain specifically identified controlled substances.
The statute covers two distinct forms of prohibited conduct:
- Unlawful use: Willfully using a controlled substance covered by the statute.
- Being under the influence: Willfully and unlawfully being under the influence of a controlled substance covered by the statute.
These are separate ways of violating the law. A person does not necessarily have to possess drugs to face an HS 11550 charge.
The statute also recognizes an exception for qualifying controlled substances administered by or under the direction of a person licensed to prescribe, dispense, or administer controlled substances.
The substance involved and the circumstances of its use are important when determining whether the law applies.
What Does Being Under the Influence of a Controlled Substance Mean in California?
Being under the influence generally means that a controlled substance has affected a person’s nervous system, brain, or muscles, resulting in an appreciable change in their physical or mental condition.
A person does not have to be unconscious, unable to walk, or completely incapable of functioning to be considered under the influence.
Law enforcement may consider signs such as:
- Impaired coordination or balance.
- Confused or unusual speech.
- Abnormal physical movements.
- Disorientation or altered awareness.
- Unusual behavior or responsiveness.
However, these symptoms alone do not automatically establish a criminal violation. Similar signs may result from fatigue, medical conditions, or other circumstances unrelated to controlled substance use.
Example: An officer encounters someone who appears disoriented and suspects drug influence. Even if the individual displays unusual behavior, prosecutors must establish that the person was under the influence of a controlled substance covered by HS 11550.
What Controlled Substances Are Covered Under HS 11550?
HS 11550 applies to specifically identified controlled substances under California Health and Safety Code §§ 11054 and 11055.
Depending on their statutory classification, covered substances include:
- Heroin.
- Cocaine.
- Methamphetamine.
- Certain prescription opioids.
- Other specifically listed controlled substances.
The exact substance matters because not every controlled substance automatically falls within HS 11550.
Marijuana is regulated under a separate California statutory framework and should not automatically be treated as a substance covered by this offense without examining its applicable legal classification.
What Must Prosecutors Prove Under HS 11550?
To obtain a conviction under HS 11550, prosecutors must prove the required elements beyond a reasonable doubt.
For a charge based on being under the influence, the prosecution generally must establish:
- The defendant was willfully under the influence of a controlled substance.
- The substance was covered by HS 11550.
- The conduct was unlawful.
The prosecution may use different types of evidence, including:
- Police observations.
- Witness testimony.
- Statements made by the defendant.
- Physical symptoms.
- Drug recognition evaluations.
- Blood or urine test results.
The prosecution must establish actual influence, not simply the possibility that someone previously consumed a controlled substance.
Is a Drug Test Required for an HS 11550 Conviction?
No. California law does not require a positive blood or urine test in every HS 11550 case.
Prosecutors may rely on other admissible evidence to establish the elements of the offense.
However, a positive toxicology result does not automatically prove that someone was under the influence when encountered by police.
For example, a person may test positive for a substance or its metabolites even when the test does not establish that the substance was actively affecting their physical or mental abilities at the relevant time.
Example: Someone undergoes a drug test after being stopped by police. The result detects traces of a controlled substance, but there is no reliable evidence establishing that the person was under its influence during the encounter.
The test result alone does not necessarily establish an HS 11550 violation. Its significance must be evaluated alongside the timing, testing method, and other evidence.
What Are the Penalties for Being Under the Influence of a Controlled Substance in California?
A standard violation of California Health and Safety Code § 11550(a) is a misdemeanor.
Potential consequences include:
| Penalty | Consequence |
|---|---|
| County jail | Up to one year |
| Probation | Up to five years |
| Additional statutory fine | Up to $70 under subdivision (d) |
| Rehabilitation | May be available as a sentencing alternative |
| Criminal record | A conviction can result in a criminal record |
The actual sentence depends on the circumstances of the offense, the defendant’s criminal history, and applicable sentencing requirements.
Can You Go to Jail for an HS 11550 Charge?
Yes. A standard conviction under HS 11550(a) can result in up to one year in county jail.
However, incarceration is not automatic in every case. Depending on the circumstances, the court may consider probation, rehabilitation, or other legally available sentencing options.
What Happens if You Have Multiple HS 11550 Convictions?
California law establishes stricter consequences for certain repeat violations.
Under HS 11550(b), a person convicted of another violation of subdivision (a) within seven years of two or more separate convictions for the same subdivision may face mandatory confinement if the person refuses to complete a licensed drug rehabilitation program offered by the court under subdivision (c).
The required confinement is:
- At least 180 days in county jail.
- No more than one year in county jail.
The statute provides an exception when no licensed rehabilitation programs are reasonably available. Financial inability to afford a program may also affect its availability under the statutory requirements.
Prior convictions and rehabilitation eligibility are therefore important considerations in repeat-offense cases.
Can Drug Rehabilitation Help With an HS 11550 Charge?
Yes. Under HS 11550(c), a court may allow an eligible individual to complete a licensed drug rehabilitation program instead of serving some or all of a county jail sentence when rehabilitation is in the interest of justice.
The court determines whether this option is appropriate based on the circumstances.
Rehabilitation is not automatically granted. Eligibility may depend on the individual’s criminal history, the nature of the offense, and applicable statutory requirements.
California law also permits certain qualifying individuals to seek deferred entry of judgment or participate in a pre-plea drug court program, subject to statutory eligibility restrictions.
What Are the Defenses to an HS 11550 Charge?
An HS 11550 charge does not automatically result in a conviction. Prosecutors must prove every required element beyond a reasonable doubt.
Depending on the circumstances, several legal defenses may be available.
1. You Were Not Under the Influence
Unusual behavior or physical symptoms do not necessarily prove drug influence.
For example, disorientation may result from a medical condition rather than controlled substance use.
If the evidence does not establish that the defendant was actually under the influence, the prosecution may have difficulty proving the charge.
2. The Substance Was Not Covered by the Statute
The prosecution must establish that the substance involved falls within the categories identified by HS 11550.
If the alleged substance is not covered by the statute, an essential element of the offense may be missing.
3. You Had a Valid Prescription or Medical Authorization
HS 11550(a) recognizes an exception for qualifying controlled substances administered by or under the direction of an authorized licensed professional.
A valid prescription and appropriate medical documentation may help establish that the medication was lawfully administered.
However, simply possessing a prescription does not automatically resolve every HS 11550 allegation. The medication, prescribing authority, and circumstances of administration must be considered.
When sufficient evidence supports the prescription defense, the prosecution must establish beyond a reasonable doubt that the statutory exception does not apply.
4. The Drug Test Results Were Unreliable
Laboratory evidence may be challenged when there are concerns about:
- Testing accuracy.
- Sample contamination.
- Collection procedures.
- Chain of custody.
- Interpretation of toxicology results.
- Whether the results establish influence at the relevant time.
A positive test alone does not necessarily establish that someone was under the influence when contacted by police.
5. Your Constitutional Rights Were Violated
Law enforcement must follow constitutional requirements when conducting detentions, searches, and seizures.
If officers obtained evidence through an unconstitutional search or seizure, a defendant may have grounds to challenge or suppress that evidence.
Whether suppression is available depends on the specific circumstances and applicable legal standards.
What Happens if You Are Under the Influence While Possessing a Loaded Firearm?
California Health and Safety Code § 11550(e) establishes a separate offense involving certain controlled substances and loaded firearms.
A person who is unlawfully under the influence of cocaine, cocaine base, heroin, methamphetamine, or phencyclidine while in the immediate personal possession of a loaded, operable firearm may face:
- Up to one year in county jail; or
- Imprisonment in state prison.
Immediate personal possession includes possession inside the passenger compartment of a motor vehicle.
Under subdivision (f), a second or subsequent conviction under subdivision (e) carries a state prison sentence of two, three, or four years.
This firearm-related offense is separate from the standard misdemeanor under HS 11550(a) and carries substantially more serious potential consequences.
Is Being Under the Influence the Same as Possessing Drugs?
No. Being under the influence and possessing a controlled substance are different criminal offenses under California law.
HS 11550 addresses unlawful use or being under the influence of specified controlled substances.
Other California statutes address drug possession:
- Health and Safety Code § 11350: Addresses possession of certain controlled substances.
- Health and Safety Code § 11377: Addresses possession of specified controlled substances.
- Health and Safety Code § 11550: Addresses unlawful use or being under the influence of specified controlled substances.
A person may face an HS 11550 charge without physically possessing drugs. Likewise, possessing a controlled substance does not automatically prove that someone was under its influence.
What Should You Do if You Are Arrested Under HS 11550?
An arrest for being under the influence of a controlled substance can have serious legal consequences. Taking appropriate steps can help protect your rights and prepare you for the criminal proceedings.
Consider the following:
- Understand the charge. Determine whether the allegation involves a standard violation, repeat offense, or firearm-related offense.
- Exercise your right to remain silent. Avoid making unnecessary statements about the allegations and request legal counsel.
- Preserve relevant documents. Keep prescriptions and medical records that may support your defense.
- Attend all court hearings. Missing a required court appearance can create additional legal problems.
- Review the evidence. Police reports, toxicology results, witness statements, and other evidence may be important to your defense.
A criminal defense attorney can review the circumstances of the arrest, evaluate the prosecution’s evidence, and explain the legal options available under California law.
Frequently Asked Questions
1. Is being under the influence of a controlled substance a misdemeanor in California?
Generally, yes. A standard violation of HS 11550(a) is a misdemeanor punishable by up to one year in county jail. However, firearm-related violations under subdivision (e) carry more serious potential penalties.
2. Can you be charged under HS 11550 without possessing drugs?
Yes. Physical possession is not required. Prosecutors must establish that the defendant was unlawfully under the influence of a controlled substance covered by the statute.
3. Can you be convicted based on a positive drug test?
A positive drug test may be evidence, but it does not automatically establish guilt. The prosecution must prove that the defendant was under the influence at the relevant time.
4. Can prescription medication result in an HS 11550 charge?
Certain prescription medications are controlled substances covered by the statute. However, qualifying administration under the direction of an authorized licensed professional is recognized as an exception.
5. How much jail time can you receive for HS 11550?
A standard violation carries up to one year in county jail. Certain repeat offenses may require at least 180 days of confinement if the statutory rehabilitation conditions are met.
6. Can an HS 11550 charge be dismissed?
Potentially. Insufficient evidence, constitutional violations, or other legal issues may provide grounds for dismissal or suppression of evidence. The outcome depends on the specific circumstances.
7. Can you receive probation for an HS 11550 conviction?
Yes. A court may grant probation for up to five years for a standard violation under subdivision (a), subject to applicable sentencing requirements.
8. Is drug rehabilitation an alternative to jail?
Potentially. A court may allow an eligible individual to complete a licensed rehabilitation program instead of serving some or all of a county jail sentence.
9. Does HS 11550 apply to marijuana?
Marijuana is regulated under a separate statutory framework in California. Whether a particular substance falls within HS 11550 depends on its specific legal classification.
Key Takeaways
- HS 11550 prohibits the unlawful use of or being under the influence of specifically identified controlled substances.
- A standard violation is a misdemeanor punishable by up to one year in county jail.
- Physical possession of drugs is not required for an under-the-influence charge.
- A positive drug test does not automatically establish criminal liability.
- Qualifying prescription medication use may provide a statutory defense.
- Certain repeat offenses can result in mandatory jail time.
- Being under the influence of specified drugs while in immediate personal possession of a loaded, operable firearm can result in more serious criminal penalties.
- Drug rehabilitation may be available as a sentencing alternative in qualifying cases.
Understanding the allegations, potential penalties, and available defenses is essential when facing an HS 11550 charge.
Speak With Southwest Legal About an HS 11550 Charge
Facing a charge for being under the influence of a controlled substance can be overwhelming. You may be concerned about jail time, your criminal record, and how the charge could affect your future.
Understanding your legal rights and available defenses is an important first step.
Southwest Legal can help you understand the legal issues surrounding an HS 11550 charge, evaluate the circumstances of your situation, and explain the options that may be available under California law.
You deserve clear information about your rights and the legal process ahead. Do not let uncertainty prevent you from exploring your options.
Contact us today for a free consultation. Discuss your concerns, get answers to your legal questions, and take an informed step toward addressing your California drug influence charge.
Disclaimer: This article is for general informational purposes only and does not constitute legal advice or create an attorney-client relationship unless and until the firm and client enter into an agreement for legal services. Laws may change, and legal outcomes depend on the specific facts of each case. Consult a qualified attorney for advice regarding your situation.