Can Astragalus and Cistanche be taken together?
Generally speaking, Astragalus (Huangqi) and Cistanche (Roucongrong) can be consumed together, but should be taken under medical supervision. Detailed explanation is as follows:

Astragalus has functions of replenishing qi and uplifting yang, consolidating the exterior to arrest perspiration, promoting diuresis and reducing edema, as well as nourishing body fluids and blood. It can enhance immune function and improve symptoms of qi deficiency such as fatigue. It is suitable for various types of qi deficiency syndromes. Additionally, Astragalus also has auxiliary effects such as antibacterial, anti-inflammatory, blood pressure-lowering, blood glucose-lowering, and antitumor properties. Cistanche has functions of tonifying kidney yang, enriching essence and blood, moistening the intestines, and relieving constipation. It is commonly used for conditions such as soreness and weakness of the waist and knees, weak muscles and bones, and constipation due to intestinal dryness. The phenylethanoid glycosides in Cistanche can promote intestinal motility and help alleviate constipation.
The qi-replenishing effect of Astragalus combined with the liver and kidney nourishing and bowel-moistening effects of Cistanche can effectively improve qi and blood deficiency, and is often used for symptoms such as physical weakness and fatigue. Astragalus contains rich polysaccharides, and various effective components in Cistanche also help enhance the body's resistance. Combining the two can improve immune function.
Attention should be paid to moderate consumption, as long-term excessive intake may lead to excessive accumulation of heat energy in the body, thereby causing heatiness symptoms. In addition, Astragalus and Cistanche can be used together to make herbal soup or boiled in water for drinking, to fully exert their effects.
References:
1. Gao Xuemin. Chinese Materia Medica [M]. 2nd Edition. Beijing: China Press of Traditional Chinese Medicine, 2012: 316-319, 358-360.
2. Li Shizhen. Compendium of Materia Medica [M]. Reprint Edition of the Jinling Version. Beijing: People's Health Publishing House, 2013: