The Official Website of the Office of His Eminence Al-Sayyid Ali Al-Husseini Al-Sistani

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21 Question: Pharmaceutical companies in the West run tests on the drugs they manufacture before selling them in the market. Is it permissible for a doctor to use a drug on his patient —without the knowledge of the patient— before its testing period is over thinking that that particular drug would cure the disease?
Answer: It is necessary to inform the patient about the situation and seek his consent on using the drug on him, except when he is sure that the drug would not cause side effects and that the doubt is only about its benefit [or otherwise].
Medical Issues
22 Question: What is the ruling of sexual intercourse with ones wife during her menstrual period?
Answer: Vaginal sexual intercourse is unlawful for the man and the woman during her state of Haydh (menstruation), and anal sexual intercourse based on obligatory precaution with a woman without her consent is not permitted.
Haydh - Menstruation / Monthly Period
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