Sorry for the delay in replying to you. I had to be offline the whole day.
I checked up the side effects of secnidazole again. In all cases, the CNS effects of secnidazole are not detailed. It is simply mentioned that there may be some CNS effects.
It was only by looking up the side effects of metonidazole (which is also an imidazole like secnidazole ) that I managed to come across some neurotoxic effects of this group of drugs.
The commonest neurotoxic side-effect is peripheral neuropathy. Beside these, there may also be convulsive seizures, peripheral neuropathy, dizziness, vertigo, ataxia, incoordination, confusion, irritability, depression, weakness, and insomnia. These effects are all listed under metronidazole but I assume they should not be very different for secnidazole.
Since depression is mentioned as one of the side effects, perhaps it will be better for you not to take any of the drugs of the imidazole family.
And yes, secnidazole as well as all the other medicines of this group (metronidazole, fluconazole, tinidazole, ornidazole etc) potentiates the action of all anti-coagulants like Coumarin and heparin and decreases the effects of birth control pills.
Laroxyl does not cross-react with secnidazole , even when in the injectible form. So these two drugs can safely be used together.