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Cannabis as medicine: interactions

The active substances in hemp have a variety of effects. We listed the medical possibilities in the last issue. If other active ingredients are consumed in addition to cannabinoids, interactions may occur.

Cannabis and THC can either increase or decrease the effects of other medications. Conversely, other medications can also modulate cannabis effects. Interactions often happen because the drugs and cannabis target the same receptors. The degradation process of the substances also plays an important role. The most important interactions with other medications known today are listed below.

Antidepressants

The sedative effect of tricyclic antidepressants may be enhanced. The antidepressant effect may also be enhanced.

Benzodiazepines

The antiepileptic effect of benzodiazepines may be enhanced.

Beta blocker

The increase in heart rate caused by cannabis can be reduced by beta blockers.

Anti-nausea agents

The antiemetic properties of cannabis and phenothiazines may reinforce each other. In the case of serotonin antagonists, which are frequently used in cancer chemotherapy, the same applies.

Glaucoma medication

The intraocular pressure-lowering effects of cannabis and corresponding medications reinforce each other.

Insulin

In humans, no relevant influences of cannabis on sugar metabolism are shown.

Neuroleptics

The antipsychotic effect of neuroleptics can be reduced. Conversely, cannabis can contribute to the reduction of movement disorders triggered by neuroleptics.

Opiates

The pain-relieving effects of the two substances can reinforce each other. In addition, cannabis counteracts the nausea that opiates sometimes cause.

Sleeping pills

The sedative and sleep-inducing effects can be enhanced by cannabis.

Theophylline

This is a substance used to treat asthma. Cannabis accelerates the breakdown of theophylline, which can lead to an increase in the dose of the same.

Alcohol

Cannabis and alcohol mutually reinforce each other's effects. Caution is advised when driving a vehicle or handling heavy machinery (reactivity, concentration).

Heart rate increasing substances

The heart rate increasing property of cannabis can be enhanced by such substances (e.g. amphetamine, cocaine, atropine). Caution with higher doses. Serious complications may occur with existing heart disease.

Non-steroidal anti-inflammatory drugs

These include aspirin, for example. These inhibit the psychological effects, heart rate acceleration, lowering of intraocular pressure and probably many other positive properties of THC. However, a combination is not harmful.

Contraindications and precautions

Absolute contraindication means that drugs must not be taken under any circumstances; relative contraindication means that they may only be used under certain conditions.

Absolute contraindication

There are people who are allergic to THC or other cannabis components. Under these circumstances, consumption should be refrained from.

Relative contraindications

Relative contraindications include severe psychiatric disorders such as schizophrenia. Conversely, however, cannabis can also have a positive effect on individual people with psychiatric disorders.

Pregnancy and nursing mothers should also be cautious because of possible transmission to the (unborn) child.

In heart diseases (coronary sclerosis, time after myocardial infarction, arrhythmia, cardiac insufficiency) overdoses should be avoided.

Older people in principle react differently to drugs than younger people. In their case, cannabis may cause unpleasant psychological side effects.

Caution is also advised when using heavy machinery or driving a vehicle, as the ability to concentrate and psychomotor skills may be affected.

Patients suffering from Huntington's disease may experience a temporary worsening of symptoms.

Cannabis is well tolerated

Cannabis products are very well tolerated and also well proven for thousands of years. The side effects are low and there are few interactions. Nevertheless, the use of THC is still completely prohibited!

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Last modified: 2022/03/26 16:23

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Legal overview

Shit happens 15 (Summer 2023)

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