Marijuana is not mentioned in the Bible. However, smoking cannabis is considered intoxicating, just as wine is intoxicating. Therefore, the scriptural cautions about drinking wine would also apply to using marijuana. “Do not join those who drink too much wine or gorge themselves on meat,” Proverbs 23:20. “Do not get drunk on wine, which leads to debauchery. Instead be filled with the Spirit,” Ephesians 5:18. 

Why is intoxication unhealthy? Because it can mask the sad consequences of life. When life brings us grief and pain, these problems should draw us to God and to the Bible. Marijuana provides a temporary escape from problems but never solves them. “Wine is a mocker…and whoever is led astray by it is not wise,” Proverbs 20:1. Instead, we should seek help and wisdom from God. “If any of you lacks wisdom, you should ask God, who gives generously to all without finding fault, and it will be given to you,” James 1:5 (NIV). It is by turning to God that we get to know Him and learn to love His ways.

Is wine evil? No. At the wedding at Cana (John 2:1-11), Jesus created between 108-162 gallons of wine. The Apostle Paul tells Timothy, “Stop drinking only water, and use a little wine because of your stomach and your frequent illnesses.” (1 Timothy 5:23) Therefore, drinking wine in moderation, occasionally, is permissible.

However, using marijuana can cause health problems. The U.S. government reports, “Limited evidence suggests that a person’s risk of heart attack during the first hour after smoking marijuana is nearly five times his or her usual risk. This observation could be partly explained by marijuana raising blood pressure (in some cases) and heart rate and reducing the blood’s capacity to carry oxygen. Marijuana may also cause orthostatic hypotension (head rush or dizziness on standing up), possibly raising danger from fainting and falls…A few studies have shown a clear link between marijuana use in adolescence and increased risk for an aggressive form of testicular cancer (nonseminomatous testicular germ cell tumor) that predominantly strikes young adult males.” Additionally, “A large longitudinal study in New Zealand found that persistent marijuana use disorder with frequent use starting in adolescence was associated with a loss of an average of 6 or up to 8 IQ points measured in mid-adulthood. Significantly, in that study, those who used marijuana heavily as teenagers and quit using as adults did not recover the lost IQ points.” 

Cannabis can be used as medicine. It is used to relieve pain, improve the well being of chemotherapy patients, help prevent some cancers from metastasizing, and, perhaps, slow the progress of Alzheimer’s, to name just a few. Medicinal marijuana is prescribed by a doctor and is used under a doctor’s supervision. Therefore, if a doctor prescribes marijuana, there should be no problem – providing the doctor monitors the patient. Marijuana is addictive, and Christians should be cautious. Sometimes an alternative, non-addictive treatment might be advisable.

Finally, whatever we do, we should do to the glory of God. The Apostle Paul teaches, “Therefore, whether you eat or drink, or whatever you do, do all to the glory of God. Give no offense, either to the Jews or to the Greeks or to the church of God, just as I also please all men in all things, not seeking my own profit, but the profit of many, that they may be saved,” 1 Corinthians 10:31-33. If a person does not feel he is glorifying God in any activity, or if he is stumbling others, then he should reconsider his actions. 

Additional Resource: 
Christian Questions Podcast 
Episode #1200: “Could an Addiction Block My Christian Growth?” 
Learning to identify and manage compulsive and addictive behavior
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CQ Rewind Show Notes

Episode #1336: “How Do We Cope With Feeling Shame?”
Understanding the role shame should and should not play in our lives
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CQ Rewind Show Notes