Medical Marijuana – How to Use It – A Doctor’s View (Part Two)

Medical Marijuana - How to Use It - A Doctor’s View (Part Two)

Dr Gary Witman

Dr. Gary Witman

Dr. Gary Witman is a New England physician who believes that medical marijuana has a place—an important place in the practice of medicine.  Dr. Witman, who is a quadriplegic from an injury that occurred while swimming in the ocean, works with Fall River Canna Care Docs in Massachusetts, one of many practices that specialize in the use of medical marijuana in several states in the Northeast.

In part one of the interview with the National Pain Report, Dr. Witman emphasized the need for real research into the use of medical marijuana. Research has been hamstrung because the DEA still labels marijuana as an illegal drug. What makes it confusing is that marijuana used for medicinal purposes (including chronic pain) is legal in half the states and the District of Columbia.

Dr. Witman also believes that marijuana is a worthy substitute for opioids and much of his practice is devoted to helping patients taper off opioids and use marijuana to treat their chronic pain.

Here’s part two of the interview where Dr. Witman talks about the best ways to use medical marijuana including vaporizing, edibles, and smoking (with some interesting thoughts on how to smoke it).

National Pain Report: Do you encounter patients that suffer from hyperalgesia?

Dr. Witman: In my current work, where I work with patients who are looking for medical marijuana, I do experience and encounter that. What I am actively doing is I am taking those patients who use opioids off of them through a gradual tapering over a period of a month. And we’re having them transition to the administration of medical marijuana with significant clinical benefits. By blocking the immune receptors and enhancing the endocannabinoid receptors, we’re demonstrating significant clinical benefits.

National Pain Report: People are finding more relief from medical marijuana than they are with opioids correct?

Dr. Witman: Absolutely.

National Pain Report: Do you think that any of that has to do with hyperalgesia with the fact that people become hypersensitive to pain stimuli?

Dr. Witman: I think so.

National Pain Report: Do you actively pursue people/patients to try medical marijuana and to switch from opioids to medical marijuana?

Dr. Witman: Those individuals who come and see me, if they demonstrate the necessary criteria, absolutely.

National Pain Report: And what are the benefits that you express to them [advocating] to switch?

Dr. Witman: A reduction in anxiety, improve concentration, improved focus, improved performance status.

National Pain Report: And the criteria are what exactly? Is it [general] lack of relief?

Dr. Witman: They are things like glaucoma, nausea (which is intractable), migraines (which are intractable to other forms of treatment), post-traumatic pain, post-traumatic stress disorder, ADHA, anxiety, restless leg syndrome, HIV.

National Pain Report: In the article that you were interviewed for, the Boston Herald, there were…I think two doctors who were interviewed said that the only safeguard is to just follow up with their patients…

Dr. Witman: Carefully monitoring the patients…

National Pain Report: What does that entail, carefully monitoring?

Dr. Witman: Well, we strongly encourage them to return in six months tops. We carefully go through their physical signs, we go through their experience with the use of cannabinoids…whether they’re using it vaporized, smoking, or some other method. We go over their strains; we go over the regular frequency of usage because it’s most critical. We feel that those individuals who would most benefit from medical cannabinoids, would most benefit from it being delivered in a vaporized fashion and with regular usage. We find it’s critical for regular usage in order to provide the greatest therapeutic benefits. Remember, we only want them to use auxiliary drugs such as Tramadol, or Neurontin, or Lyrica or low doses opioid only with the greatest of breakthrough pain. Because we want to go carefully with them through their clinical experience.

National Pain Report: And frequency is key, and obviously the method and route of delivery is key too. What about Vaporizing is preferred?

Dr. Witman: Well first of all in terms of the reason we don’t like smoking is that smoking the temperature goes up to 1200 degrees [Fahrenheit] with a significant amount of ash residue. Plus it delivers to your lungs aryl hydrocarbon hydroxylase which increases your risk for lung cancer and chronic obstructive pulmonary disease. For those reasons alone, we recommend that no individuals smoke marijuana.

National Pain Report: That’s interesting, so with smoking it, you’re increasing your risk of lung problems in the future.

Dr. Witman: Yeah so we don’t recommend smoking to any of the individuals.

National Pain Report: You do recommend vaporizing it. There are a few different types of vaporizers: the oil based vaporizers and oven type vaporizers that provide the decarboxylate [process]. That, I was told and read about is the most beneficial.

Dr. Witman: Absolutely most correct

National Pain Report: And that method of heating it up, in a sense, what about that is beneficial other than the fact it’s not a carcinogen and cause future lung problems?

Dr. Witman: What’s most beneficial is the onset and is within 30-60 seconds after the initiation of treatment with the duration lasting from 4-5 hours. There’s no residue, t’s clean, and it can be done with discretion.

National Pain Report: Do you feel that with smoking it, which is a tried and true method, is it the fact that that’s the only way there could be a potential for future lung problems or even with vaporizing is there a potential for injury to the lung?

Dr. Witman: No it’s something that can be done easily using a tube, using a pipe. For those individuals who wish to have the greatest experience, we encourage them to acquire a device called The Volcano; it costs around six hundred dollars.

National Pain Report: Other than vaporizing do you recommend any other method of consuming such as eating edibles.

Dr. Witman: Yes, the other recommendation is for the usage in edibles. Cookies, brownies, gummies, any of the edible products.

National Pain Report: Do you feel there are pros in cons to the edibles?

Dr. Witman: The only downside with the edible is that it requires about one hour to absorb. The other problem is there’s such a prolonged duration of therapy; it can last up to 15 hours. For those individuals who are gainfully employed — it may have an impact on their work performance, the subsequent morning, as well as their driving abilities.

National Pain Report: It also kind of gives a hangover effect which I thought was very unique. If the edibles aren’t cooked properly they won’t have any effect which for people who live in areas without any kind of regulation at all and in an illegal environment — you kind of are getting whatever comes to you. And in those instances it is hard to know whether edibles actually work or if it is that particular edible that wasn’t made properly. For oils and tinctures do you recommend those? They’re very popular in Georgia — do you feel it’s an effective method?

Dr. Witman: As well they should be. They’re very popular here too. They’re extremely well tolerated; I have found no side effects from them whatsoever.

National Pain Report: Is it better to use a tincture/oil than it is to have an edible or to vaporize? What would be the top recommended?

Dr. Witman: Vaporizing by far. I like the duration; I like the immediate onset of treatment and consistent therapeutic benefit.


The most controversial comment made during the interview is that smoking medical marijuana via a joint (paper wrapper) or blunt (cigar wrapper) and lighting it on fire is harmful to the lungs — increasing risk of lung injury including lung cancer and COPD. This is a contentiously debated claim within the marijuana community and in direct contradiction to the community’s no harm done mantra. Dr. Witman’s comments certainly add to a commonly heard complaint among many in the medical marijuana community, and particularly among chronic pain providers: the lack scientific study is hurting our understanding and as a result potentially the treatment of potential patients.

Click here for a previous NationalPainReport article: Vaporized Cannibis Reduces Neuropathy Pain.

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Authored by: Allie Haroutunian

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A. Nonymous

Great article. I have watched my husband slowly transition from 50 mg. methadone to zero. Took about 3 months. That last 5 mg. was terrible. All the withdrawal symptoms. Diarrhea, shakes, anxiety. All of it. He has begun using medical cannabis (marijuana). As residents of a state where both medical and recreational cannabis is legal, I am grateful for this choice. As the “war on opiates” continues, it became very clear to us that his usage of methadone was bound to create medical issues soon. He consumes cannabis by oral capsules and also vaporizing. He finds more relief from the marijuana that he found in 10 years of methadone treatment for chronic pain. He has endured 5 back surgeries, a MRSA from nerve stimulator battery replacement that required a month in the hospital, and every form of pain intervention imaginable. I quit counting the spinal injections at 23 a few years ago. While I know these are anecdotal stories, I cannot ignore the significant changes in his physical pain level. That being said, we have been ostracized by our family for his usage due to their ignorance of the facts and science that DOES exist in other areas of the world. He is a former police officer and it is so difficult to educate people on alternative therapies. However, it is worth it to have no more concern about his ability to obtain opiates. This is a plant, and we are fully capable of producing it ourselves. No big pharma needed. Lastly, in his search for pain relief, we have seen many doctors. So far, three have been encouraging of his usage, including our present pain management specialist. We were quite certain we would be fired as patients when we revealed no more methadone was needed, but his attitude was open and reasonable. Don’t give up. Over these past years of dealing with chronic pain, we have learned this: You must be an advocate for yourself. It is shameful to see so many people being denied pain relief in this day and age, but this has been our solution to it.

Mona Twocats-Romero

Two articles showing how cannabis does not cause lung cancer or COPD, even though this doctor does not seem to be aware of the new studies which show no lung cancer, even somewhat of a protective effect, and COPD from smoking cannabis.

Mark Ibsen

Dr Whitman is doing just what I did here:
Move people off opioids towards Mmj

He may be right about the smoking part. I had that point of view.
But one only figures that out if they listen to the patients.

I have 2,000 recommends for Mmj

I was carrying 150 pain patients, tops.
His experience and mine are quite close.

Like Dr Anderson said:
They should be asking me how I got such good results.