Is it permissible for someone who takes Senna Mecca ( العشرق ) to combine prayers by jama‘ taqdim? And is the Hajj of one who performed Hajj al-Ifrad valid?

If drinking senna often leads to uncontrollable diarrhea that does not stop by the time of the second prayer, then it is permissible to combine the prayers in this situation. This is evident from the statements of the Hanbali jurists. The Maliki jurists explicitly state that a person suffering from severe diarrhea should perform a "pictorial" combination of prayers, which involves delaying the first prayer until the end of its time and performing the second prayer at the beginning of its time. As for someone who performed Hajj Mufrid (isolated Hajj), their Hajj is valid. Ifrad (definition) is one of the three types of Hajj rituals, and it is considered superior by the Shafi'is and Malikis, while Tamattu' is considered superior by the Hanbalis.