Heat/ice. For acute sciatic pain, heat and/or ice packs are readily available and can help alleviate the leg pain, especially in the initial phase. ...
Pain medications. Over-the-counter or prescription medications are often effective in reducing or relieving sciatica pain
Reference: Koes, B. W., Van Tulder, M. W., & Peul, W. C. (2007). Diagnosis and treatment of sciatica. Bmj, 334(7607), 1313-1317.
From the above paper
"In general the clinical course of acute sciatica is favourable and most pain and related disability resolves within two weeks. For example, in a randomised trial that compared non-steroidal anti-inflammatory drugs with placebo for acute sciatica in primary care 60% of the patients recovered within three months and 70% within 12 months. About 50% of patients with acute sciatica included in placebo groups in randomised trials of non-surgical interventions reported improvement within 10 days and about 75% reported improvement after four weeks. In most patients therefore the prognosis is good, but at the same time a substantial proportion (up to 30%) continues to have pain for one year or longer."
I've had great success in helping my patients gain relief from sciatic pain with shiatsu, working throughout the lumbar and gluteal regions and down the posterior leg. There is not as yet any evidence-based research to support the use of shiatsu specifically for sciatica, but it has been shown to be beneficial for pain, particularly low back pain. Self-care including heat and stretching is also very helpful, along with addressing any postural/occupational issues that may be contributing to it.
Patience. 80-90% will settle spontaneously within 4 weeks. Don't rush to drugs - generally side - effects > benefit, other than for simple analgesics. Need to know MUCH more Hx & Ex findings to comment further. That should be with your own practitioner. Stay mobile, and at work on light duties if possible. Take all other "internet" advice very circumspectly.
there is a positive case of one 80 year old man with sciatic pain for 3 months, treated by a mixture of special cream mixed with lidocaine and diclofenac, in a mixture of green clay . appllied on his back as a cataplasme,.
One way not to aggravate the pain is to use proper lifting techniques. If it is moderate pain sciatica may go away in a few months. Colleagues above have suggested various medications and excellent recommendations. I may add that one home remedy that seemed to help was using camphor vapor. The origin of this is from Chinese and Ayurvedic medicine.