Legality
Australia
Necrophilia is not explicitly mentioned in Australian law; however, under the Crimes Act 1900 – Sect 81C, penalised for misconduct with regard to corpses is any person who:(a) indecently interferes with any dead human body, or
(b) improperly interferes with, or offers any indignity to, any dead human body or human remains (whether buried or not), and

shall be liable to imprisonment for two years. Brazil
Article 212 of the Brazilian Penal Code (federal Decree-Law No 2.848) states as follows:
Art. 212 – To abuse a cadaver or its ashes:Penalty: detention, from 1 to 3 years, plus fine. Although sex with a corpse is not explicitly mentioned, a person who has sex with a corpse may be convicted of a crime under the above Article. The legal asset protected by such Article is not the corpses objective honour, but the feeling of good memories, respect, and veneration that living people keep about the deceased person: these persons are considered passive subjects of the corpses violation. India
Section 297 of the Indian Penal Code entitled "Trespassing on burial places, etc.
Treatment-resistant depression
The combination medicine dextromethorphan/bupropion is approved for treatment-resistant major depressive disorder due to its action on the NMDA receptor. Available forms
Dextromethorphan is available alone in the form of cough syrup and pills as well as in combination with other agents. As a pharmaceutical drug, it is available as dextromethorphan/quinidine (Nuedexta) for the treatment of pseudobulbar affect and as dextromethorphan/bupropion (Auvelity) for treatment-resistant major depressive disorder. Contraindications
Because dextromethorphan can trigger a histamine release (allergic reaction), atopic children, who are especially susceptible to allergic reactions, should be administered dextromethorphan only if absolutely necessary, and only under the strict supervision of a healthcare professional. Adverse effects
Side effects of dextromethorphan at normal therapeutic doses can include:

A rare side effect is respiratory depression. Neurotoxicity
Dextromethorphan was once thought to cause Olneys lesions when administered intravenously; however, this was later proven inconclusive, due to lack of research on humans. Tests were performed on rats, giving them 50 mg or more every day for as long as a month. Neurotoxic changes, including vacuolation, have been observed in posterior cingulate and retrosplenial cortices of rats administered other NMDA receptor antagonists such as PCP, but not with dextromethorphan. Dependence and withdrawal
In many documented cases, dextromethorphan has produced psychological dependence in people who used it recreationally. It is considered less addictive than other common cough suppressants, such as the weak opiate codeine. Since dextromethorphan also acts as a serotonin reuptake inhibitor, users report that regular recreational use over a long period of time can cause withdrawal symptoms similar to those of antidepressant discontinuation syndrome.