Marijuana (cannabis) has a long history of use for various medical purposes, including support during convalescence—the period of recovery following illness or medical treatment. Scientifically, cannabis is known to have properties that may help alleviate symptoms often experienced during convalescence, such as pain, nausea, loss of appetite, and insomnia. Several studies and systematic reviews have found that cannabinoids, particularly THC and CBD, can reduce chronic pain and stimulate appetite, which may indirectly support recovery and nutritional rehabilitation. Additionally, cannabis has been shown to improve mood and reduce anxiety in some patients, potentially enhancing overall well-being during recovery.

However, direct evidence specifically evaluating marijuana's efficacy for the broad process of convalescence is limited. Most of the research focuses on symptom management rather than holistic recovery outcomes. Clinical guidelines for conditions like cancer or AIDS sometimes support cannabis-based medications for managing nausea, vomiting, and cachexia, which are relevant to convalescent care. Nonetheless, there is a lack of robust, high-quality randomized controlled trials that assess marijuana's overall impact on the process of convalescence from a wide range of illnesses.

Therefore, while there is scientific rationale and some evidence for the use of marijuana to alleviate specific symptoms that may hinder recovery, the overall evidence supporting its use for convalescence as a whole is limited and rated as low to moderate (2/5).